pat1011-1020

一开始几道题写到吐血，真的自己现在好弱
1011 水题不说了

#include<bits/stdc++.h>
using namespace std;
const int N = 105;
typedef unsigned long long ll;
const int MOD = 1e9+7;

int c[5];
int main() {
  double ans = 1;
  for(int i = 1; i <= 3; ++i) {
    double mx = -1;
    for(int j = 1; j <= 3; ++j) {
      double a; scanf("%lf", &a);
      if(mx < a) {
        mx = a; c[i] = j;
      }
    }
    ans *= mx;
  }
  ans = (ans*0.65-1)*2;
  for(int i = 1; i <= 3; ++i) {
    printf("%s ", c[i]==1? "W": (c[i]==2?"T":"L") );
  }
  printf("%.2f\n", ans);
}

1012 比较麻烦，一开始处理一下

#include<bits/stdc++.h>
using namespace std;
const int N = 105;
typedef unsigned long long ll;
const int MOD = 1e9+7;
const int INF = 0x3f3f3f3f;

int n, m;
char s[2005][8];
int C[5][2005];
int cc[5][105];
map<string, int> cmp;
map<int,int> mp;
map<int,int> ::iterator it;

int main() {
  while(~scanf("%d %d",&n,&m)) {
    memset(cc, 0, sizeof(cc));
    cmp.clear();

    for(int i = 1; i <= n; ++i) {
      scanf("%s %d %d %d", s[i], &C[0][i], &C[1][i], &C[2][i]);
      cmp[s[i]] = i;

      C[3][i] = (C[0][i]+C[1][i]+C[2][i]) / 3;
      //iprintf(" %d", C[3][i]);
    }
    int cnt = 1;

    for(int j = 0; j < 4; ++j) {
      mp.clear();
      for(int i = 1; i <= n; ++i) {
        mp[C[j][i]] ++;
      }
      cnt = 1;
      for(it = mp.end(), --it; ; --it) {
        cc[j][it->first] = cnt;
        cnt += it->second;
        if(it == mp.begin()) break;
      }
      for(int i = 1; i <= n; ++i) {
        C[j][i] = cc[j][C[j][i]];
      }
    }

  //  for(int i = 1; i <= n; ++i) {
//      for(int j = 0; j < 4; ++j) printf("%d ", C[j][i]); printf("\n");
//    }

    for(int i = 1; i <= m; ++i) {
      char tmp[15]; scanf("%s", tmp);
      if( cmp.find(tmp) == cmp.end() ) printf("N/A\n");
      else {
        int tt = cmp[tmp];
        int po, mi = INF;
      //  for(int j = 0; j < 4; ++j) printf("%d ",C[j][tt]); printf("\n");

        if(mi > C[3][tt]) {
          mi = C[3][tt]; po = 3;
        }
        for(int j = 0; j < 3; ++j) {
          if(mi > C[j][tt]) {
            mi = C[j][tt]; po = j;
          }
        }

        printf("%d ", mi);
        if(po == 0) printf("C\n");
        else if(po == 1) printf("M\n");
        else if(po == 2) printf("E\n");
        else printf("A\n");
      }
    }
  }
  return 0;
}

1013 dfs一下

#include<bits/stdc++.h>
using namespace std;
typedef unsigned long long ll;
const int MOD = 1e9+7;
const int INF = 0x3f3f3f3f;
const int N = 1e3+5;

int n, m, k;
struct Node{
  int nx, to;
}E[N*N*2];
int head[N], tot;

void add(int fr,int to) {
  E[tot].to = to; E[tot].nx = head[fr]; head[fr] = tot++;
}
int ans[N];
int cnt; int nop;
int vis[N];
void dfs(int x) {
  for(int i = head[x]; ~i; i = E[i].nx) {
    int to = E[i].to;
    if(!vis[to] && to != nop) {
      vis[to] = 1;
      dfs(to);
    }
  }
}
void solve(int x) {
  cnt = 0;
  memset(vis, 0, sizeof(vis));
  nop = x;
  for(int i = 1; i <= n; ++i) {
    if(i != nop && !vis[i]) {
      dfs(i); cnt ++;
    }
  }
  ans[x] = cnt-1;
}

int main() {
  while(~scanf("%d %d %d", &n, &m, &k)) {
    memset(head, -1, sizeof(head)); tot = 0;
    memset(ans, -1, sizeof(ans));

    for(int i = 0; i < m; ++i) {
      int a, b; scanf("%d %d", &a, &b);
      add(a, b); add(b, a);
    }

    for(int i = 1; i <= k; ++i) {
      int a; scanf("%d",&a);
      if(ans[a] == -1) solve(a);
      printf("%d\n", ans[a]);
    }

  }
  return 0;
}

1014 这道题我的理解完全不一样，对于5点下班这件事，我真的无语，这种坑就需要猜了

#include<bits/stdc++.h>
using namespace std;
const int N = 1e4+5;
const int INF = 0x3f3f3f3f;
typedef long long ll;

int usetime[1005];
int ans[1005];
queue<pair<int,int> > Q[25];

void solve(int id, int x) {
  int t1 = (x-usetime[id])/60; int t2 = (x-usetime[id])%60;
  if(t1+8 >= 17 ) {
    printf("Sorry\n");
    return;
  }

  t1 = x/60; t2 = x%60;
  printf("%02d:%02d\n", t1+8, t2);
}

int main() {
  int n, m, k, q;
  while(~scanf("%d %d %d %d", &n, &m, &k, &q)) {
    memset(ans, 0, sizeof(ans));
    for(int i = 1; i <= n; ++i) {
      if(!Q[i].empty()) Q[i].pop();
    }

    for(int i = 1; i <= k; ++i) {
      scanf("%d", &usetime[i]);
    }
    for(int i = 1; i <= min(k, n*m); ++i) {
      int tt = (i-1)%n + 1;
      Q[tt].push(make_pair(usetime[i],i));
    }

    int ntime = 0;
    for(int i = min(k,n*m)+1; i <= k; ++i) {
      int mi = INF; int po;
      for(int j = 1; j <= n; ++j) {
        int ti = Q[j].front().first;
        if(mi > ti) {
          mi = ti; po = j;
        }
      }

      int t2 = Q[po].front().second; Q[po].pop();
      ans[t2] = ntime+mi;
      ntime += mi;
      Q[po].push(make_pair(usetime[i],i));

      for(int j = 1; j <= n; ++j) {
        if(j != po) {
          Q[j].front().first -= mi;
        }
      }
    }

    for(int j = 1; j <= n; ++j) {
      int wtime = ntime;
      while(!Q[j].empty()) {
        int t1 = Q[j].front().first; int t2 = Q[j].front().second; Q[j].pop();
        ans[t2] = wtime+t1;
        wtime += t1;
      }
    }

    for(int i = 1; i <= q; ++i) {
      int a; scanf("%d", &a);
      if(ans[a] == 0) while(1);
      solve(a, ans[a]);
    }
  }
  return 0;
}

/*

2 2 7 5
1 2 6 4 3 534 2
3 4 5 6 7

*/

1015深坑， 1000翻转0001不合法的

#include <bits/stdc++.h>
using namespace std;
const int N = 1e5+5;

int prime(int x) {
//  printf("%d\n", x);
  for(int i = 2; i < x; ++i) {
    if(x % i == 0) {
      return 0;
    }
  }
  return 1;
}
int main() {
  int n, d;
  while(~scanf("%d", &n)) {
    if(n < 0) break;
    scanf("%d",&d);

    int tt = n;
    vector<int> vc;
    while(tt) {
      vc.push_back(tt%d);
      tt /= d;
    }

    int _n = 0;
    if(vc[0] == 0) {
      printf("No\n"); continue;
    }
    for(int i = 0; i < vc.size(); ++i) {
  //    printf("%d\n",vc[i]);
      _n = _n*d + vc[i];
    }

    if(prime(n) && prime(_n)) printf("Yes\n");
    else printf("No\n");
  }
  return 0;
}

1016 很烦一题，我的世界一开始计算错了

#include<cmath>
#include<map>
#include<iostream>
#include<cstring>
#include<cstdio>
#include<set>
#include<vector>
#include<algorithm>
using namespace std;
typedef long long ll;
const int N = 1e5+5;
#define MP(x, y) make_pair(x, y)

int toll[30];
char s[1005][50];
struct Node{
  int mon, day, hour, mina; int on;
  Node(int a=0, int b=0, int c=0, int d=0, int e=0):mon(a), day(b), hour(c), mina(d), on(e){}
};

map<string, int> mp; int tot;
map<string, int> ::iterator it;
vector<Node> tim[1005];
vector< pair< pair<Node,Node>, pair<int, int> > > ans[1005][15];

int cmp(Node a, Node b) {
  if(a.mon != b.mon) return a.mon < b.mon;
  else if(a.day != b.day) return a.day < b.day;
  else if(a.hour != b.hour) return a.hour < b.hour;
  else return a.mina < b.mina;
}

int main() {
  int allhour = 0;
  for(int i = 0; i <= 23; ++i) {
    scanf("%d", &toll[i]);
    allhour += toll[i];
  }
  tot = 0;

  int n;
  scanf("%d", &n);
  for(int i = 1; i <= n; ++i) {
    char tmp[10];
    scanf("%s", s[i]);
    int a,b,c,d, e=1;
    scanf("%d:%d:%d:%d", &a, &b, &c, &d);

    scanf("%s", tmp);
    if(tmp[1] == 'f') e *= -1;

    if(mp.find(s[i]) == mp.end()) mp[s[i]] = ++tot;
    tim[mp[s[i]]].push_back(Node(a,b,c,d,e));
  }

  for(int i = 1; i <= tot; ++i) {
    sort(tim[i].begin(), tim[i].end(), cmp);
    for(int j = 0; j < tim[i].size(); j += 2) {
      if(tim[i][j].on > 0 && j+1 < tim[i].size() && tim[i][j+1].on < 0) {
        int a1, a2;

        int t1 = toll[tim[i][j].hour]* tim[i][j].mina;
        for(int k = 0; k < tim[i][j].hour; ++k) t1 += toll[k]*60;

        int t2 = toll[tim[i][j+1].hour]* tim[i][j+1].mina;
        for(int k = 0; k < tim[i][j+1].hour; ++k) t2 += toll[k]*60;
        if(tim[i][j].day == tim[i][j+1].day) {
          a1 = t2-t1;
        }else {
          a1 = (allhour*60 - t1) + t2;
          a1 += (tim[i][j+1].day-tim[i][j].day-1) * allhour*60;
        }

        t1 = tim[i][j].mina;
        for(int k = 0; k < tim[i][j].hour; ++k) t1 += 60;

        t2 = tim[i][j+1].mina;
        for(int k = 0; k < tim[i][j+1].hour; ++k) t2 += 60;
        if(tim[i][j].day == tim[i][j+1].day) {
          a2 = t2-t1;
        }else {
          a2 = (24*60 - t1) + t2;
          a2 += (tim[i][j+1].day-tim[i][j].day-1) * 24*60;
        }

        ans[i][tim[i][j].mon].push_back( MP( MP(tim[i][j], tim[i][j+1]), MP(a2,a1) ) );
      }else j--;
    }
  }

  for(it = mp.begin(); it != mp.end(); ++it) {
    int id = it->second;
    for(int j = 1; j <= 12; ++j) {

      if(ans[id][j].size() > 0) {
        int all = 0;
        for(int k = 0; k < it->first.length(); ++k) printf("%c", it->first[k]);
        printf(" %02d\n", j);

        for(int k = 0; k < ans[id][j].size(); ++k) {
          Node t1 = ans[id][j][k].first.first; Node t2 = ans[id][j][k].first.second;
          int t3 = ans[id][j][k].second.first; int t4 = ans[id][j][k].second.second;
          all += t4;
          printf("%02d:%02d:%02d %02d:%02d:%02d %d $%.2f\n",
              t1.day,t1.hour,t1.mina, t2.day,t2.hour,t2.mina ,t3, t4/100.0);
        }
        printf("Total amount: $%.2f\n", all/100.0);
      }
    }
  }
}

1017数据无话可说，我对于时间的界限还是不好掌握

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define MP(x, y) make_pair(x, y)
#define FI first
#define SE second

const int N = 1e4+5;
const int INF = 0x3f3f3f3f;

struct Node{
    int tim, spend, id;
    Node(int a=0, int b=0, int c=0):tim(a), spend(b), id(c){}
}E[N];
int comtime[N];
int ans[N];
int cmp(Node a, Node b) {
    return a.tim < b.tim;
}
int windows[105];

int main() {
    int n, k;
    while(~scanf("%d %d", &n, &k)) {
        for(int i = 1; i <= n; ++i) {
            int a, b, c, d;
            scanf("%02d:%02d:%02d %d", &a,&b,&c,&d);
            int tt = a*60*60 + b*60 + c;
            if(d > 60) d = 60;
            E[i] = Node(tt, d, i);
            comtime[i] = tt;
        }
        sort(E+1, E+n+1, cmp);

        for(int i = 1; i <= k; ++i) windows[i] = 8*3600;

        int ntime = 0;
        for(int i = 1; i <= n; ++i) {
       //     printf("%d ", E[i].tim);
            int mx = INF, po;
            for(int j = 1; j <= k; ++j) {
                if(mx > windows[j]) {
                    mx = windows[j]; po = j;
                }
            }
            mx = max(E[i].tim, mx);
            ans[E[i].id] = mx;
         //   printf("%d\n", mx);

            windows[po] = mx + E[i].spend*60;
        }

        int all = 0;
        int cnt = 0;
        for(int i = 1; i <= n; ++i) {
     //       printf("%d %d\n", ans[i], comtime[i]);

            if(comtime[i] > 17*3600) {
                continue;
            }
            cnt ++;
            int tt = ans[i]-comtime[i];
            all += tt;
        }

        if(cnt) printf("%.1f\n", all/60.0/cnt);
        else printf("0.0\n");
    }
    return 0;
}

1018把我写成狗，我真的得掌握dijsktra+dfs这种方法，比我这个好多了
当然别忘了send，back可能同时存在，这很重要

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define MP(x, y) make_pair(x, y)
#define FI first
#define SE second

const int N = 505;
const int INF = 0x3f3f3f3f;

int Cmax;
int n, sp, m;
int C[N];
struct Node{
    int to, nx, dis;
}E[N*N*2];
int head[N], tot;
void add(int a, int b, int c) {
    E[tot].to = b; E[tot].nx = head[a]; E[tot].dis = c;
    head[a] = tot++;
}
struct HeapNode{
    int po, di;
    HeapNode(int a=0, int b=0):po(a), di(b){}
    bool operator <(const HeapNode & T) const{
        return di > T.di;
    }
};
int dis[N]; int vis[N];
struct Pode{
    int send, bak, pre, preid;
    Pode(int a=0, int b=0, int c=0, int d=0):send(a), bak(b), pre(c), preid(d){}
};
vector<Pode> bike[N];
void dijstra(int st) {
    memset(dis, INF, sizeof(dis));
    memset(vis, 0, sizeof(vis));

    for(int i = 0; i <= n; ++i) bike[i].clear();
    dis[st] = 0; bike[st].push_back(Pode(0,0,0,0));

    priority_queue<HeapNode> Q;
    Q.push(HeapNode(st, dis[st]));
    while(!Q.empty()) {
        int x = Q.top().po; Q.pop();
        if(vis[x]) continue;
        vis[x] = 1;

        for(int i = head[x]; ~i; i = E[i].nx) {
            int to = E[i].to;

            if(dis[to] > dis[x]+E[i].dis) {
                dis[to] = dis[x]+E[i].dis;

                bike[to].clear();
                for(int j = 0; j < bike[x].size(); ++j) {
                    int t1 = bike[x][j].send; int t2 = bike[x][j].bak;

                    if(Cmax <= C[to]) t2 += C[to]-Cmax;
                    else {
                        int t3 = Cmax-C[to]; int t4 = min(t2, t3);
                        t2 -= t4; t3 -= t4;
                        if(t3) t1 += t3;

                    }

                    bike[to].push_back(Pode(t1, t2, x, j));

                }
                Q.push(HeapNode(to, dis[to]));
            }
            else if(dis[to] == dis[x]+E[i].dis) {
                map<pair<int,int> , int> mmp; mmp.clear();
                for(int j = 0; j < bike[to].size(); ++j) {
                    mmp[ MP(bike[to][j].send, bike[to][j].bak) ] ++;
                }
                for(int j = 0; j < bike[x].size(); ++j) {
                    int t1 = bike[x][j].send; int t2 = bike[x][j].bak;

                    if(Cmax <= C[to]) t2 += C[to]-Cmax;
                    else {
                        int t3 = Cmax-C[to]; int t4 = min(t2, t3);
                        t2 -= t4; t3 -= t4;
                        if(t3) t1 += t3;
                    }

                    if(mmp.find(MP(t1, t2)) == mmp.end())
                        bike[to].push_back(Pode(t1, t2, x, j));
                }
            }
        }
    }
}
void dfs(int x, int id) {
  //  printf("%d %d\n", x, id);
    if(x == 0) {
        printf("0"); return;
    }

    int pre = bike[x][id].pre; int preid = bike[x][id].preid;
    dfs(pre, preid);

    printf("->%d", x);
}
void solve() {
    int a1 = INF, a2 = INF; int id;
    for(int i = 0; i < bike[sp].size(); ++i) {
        if(a1 > bike[sp][i].send) {
            a1 = bike[sp][i].send; a2 = bike[sp][i].bak; id = i;
        }else if(a2 >bike[sp][i].bak && a1 == bike[sp][i].send) {
            a2 = bike[sp][i].bak; id = i;
        }
    }

    printf("%d ", bike[sp][id].send);
    dfs(sp, id);
    printf(" %d\n", bike[sp][id].bak);
  //  if(bike[sp][id].send && bike[sp][id].bak) while(1);
}

int main() {
    C[0] = 0;
    while(~scanf("%d %d %d %d", &Cmax, &n, &sp, &m)) {
        Cmax /= 2;
        memset(head, -1, sizeof(head)); tot = 0;
        for(int i = 1; i <= n; ++i) {
            scanf("%d", &C[i]);
        }
        for(int i = 0; i < m; ++i) {
            int a, b, c; scanf("%d %d %d",&a,&b,&c);
            add(a, b, c); add(b, a, c);
        }

        dijstra(0);
        solve();
    }
    return 0;
}

1019

#include<iostream>
#include<cstdio>
#include<cstring>
#include<vector>
#include<cmath>

using namespace std;
const int INF = 0x3f3f3f3f;
const int N = 1e6+5;
const int M = 3e5+5;

int main() {
  int n, b;
  while(~scanf("%d %d",&n,&b)) {
    int tmp = n;
    vector<int> ans;
    while(tmp) {
      ans.push_back(tmp%b);
      tmp /= b;
    }

    int fl = 1;
    int len = ans.size();
    for(int i = 0; i < len/2; ++i) {
      if(ans[i] != ans[len-i-1]) {
        fl = 0; break;
      }
    }

    if(fl) printf("Yes\n");
    else printf("No\n");

    if(n == 0) {
      printf("0\n");
      continue;
    }
    for(int i = len-1; i >= 0; --i) {
      if(i != len-1) printf(" ");
      printf("%d", ans[i]);
    }
    printf("\n");
  }
  return 0;
}

1020

#include<iostream>
#include<cstdio>
#include<cstring>
#include<vector>
#include<cmath>
#include<queue>

using namespace std;
const int INF = 0x3f3f3f3f;
const int N = 1e6+5;
const int M = 3e5+5;

int a[35];
int b[35];

struct Node{
  int l,r,L,R;
  Node(int a=0, int b=0, int c=0, int d=0):l(a), r(b), L(c), R(d){}
};
int main() {
  int n;
  while(~scanf("%d", &n)) {
//    memset(head, -1, sizeof(head)); tot = 0;

    for(int i = 1; i <= n; ++i) scanf("%d", &a[i]);
    for(int i = 1; i <= n; ++i) scanf("%d", &b[i]);

    queue<Node> Q;
    Q.push(Node(1, n, 1, n));
    int fl = 1;
    int cnt = 0;
    while(!Q.empty()) {
      Node t = Q.front(); Q.pop();
      if(t.l > t.r) continue;
    /*  printf("%d\n", cnt);
      if(cnt < 10) {
        printf("%d\n", t.r);
        cnt ++;
      }*/
      int tag = a[t.r];

      if(fl) {
        fl = 0;
      }else printf(" ");

      printf("%d", tag);

      if(t.l == t.r) continue;

      int M;
      for(int i = t.L; i <= t.R; ++i) {
        if(b[i] == tag) {
          M = i-1; break;
        }
      }

      int m = t.l+(M-t.L);

      Q.push(Node(t.l, m, t.L, M));
      Q.push(Node(m+1, t.r-1, M+2, t.R));
    }
    printf("\n");
  }
  return 0;
}