uva 10131
DP 先对大象体重排序 然后寻找智力的最长升序子列 输出路径....
#include <iostream>
#include <cstring>
#include <cstdio>
#include <algorithm>
#define inf 0x7fffffff
using namespace std; typedef struct
{
int w,s,num;
} elem; bool cmp(elem a, elem b)
{
return a.w > b.w;
} elem tel[1010];
int q = 0;
int g[1010],d[1010],pre[1010],lu[1010];
void backtrack(int index)
{
if (pre[index] != -1)
backtrack(pre[index]);
lu[q++] = tel[index].num + 1;
}
int dd(int c)
{
d[0] = 1;
int di,m,ans = 0;
for(int i = 1; i < c; i++)
{
m = 0;
for(int j = 0; j < i; j++)
{
if(d[j] > m && tel[j].s < tel[i].s && tel[j].w > tel[i].w)
{
m = d[j];
pre[i] = j;
}
}
d[i] = m + 1;
if(d[i] > ans)
{
ans = d[i];
di = i;
}
}
printf("%d\n",ans);
backtrack(di);
for(int i = q-1; i >= 0; i--)
printf("%d\n",lu[i]);
return ans;
}
int main()
{
int n = 0;
q = 0;
memset(d, 0, sizeof(d));
memset(lu, 0, sizeof(lu));
memset(pre, -1, sizeof(pre));
while(scanf("%d%d",&tel[n].w,&tel[n].s) == 2)
{
tel[n].num = n;
n++;
}
sort(tel, tel+n, cmp);
// for(int i = 1; i <= n; i++)
// g[i] = inf;
// int ans = 0;
// int q = 0;
// for(int i = 0; i < n; i++)
// {
// int k = lower_bound(g+1, g+n+1, tel[i].s-1) - g;
// //printf("%d\n",k);
// d[i] = k;
// g[k] = tel[i].s;
// if(d[i] > ans)
// {
// ans = d[i];
// pre[q++] = i;
// //printf("%d\n",i);
// }
// }
// printf("%d\n",ans);
// for(int i = q-1; i >= 0; i--)
// printf("%d\n",tel[pre[i]].num+1);
dd(n);
return 0;
}
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