[Codeforces 863D]Yet Another Array Queries Problem
Description
You are given an array a of size n, and q queries to it. There are queries of two types:
- 1 li ri — perform a cyclic shift of the segment [li, ri] to the right. That is, for every x such that li ≤ x < ri new value of ax + 1 becomes equal to old value of ax, and new value of ali becomes equal to old value of ari;
- 2 li ri — reverse the segment [li, ri].
There are m important indices in the array b1, b2, ..., bm. For each i such that 1 ≤ i ≤ m you have to output the number that will have index bi in the array after all queries are performed.
Input
The first line contains three integer numbers n, q and m (1 ≤ n, q ≤ 2·105, 1 ≤ m ≤ 100).
The second line contains n integer numbers a1, a2, ..., an (1 ≤ ai ≤ 109).
Then q lines follow. i-th of them contains three integer numbers ti, li, ri, where ti is the type of i-th query, and [li, ri] is the segment where this query is performed (1 ≤ ti ≤ 2, 1 ≤ li ≤ ri ≤ n).
The last line contains m integer numbers b1, b2, ..., bm (1 ≤ bi ≤ n) — important indices of the array.
Output
Print m numbers, i-th of which is equal to the number at index bi after all queries are done.
Sample Input
6 3 5
1 2 3 4 5 6
2 1 3
2 3 6
1 1 6
2 2 1 5 3
Sample Output
3 3 1 5 2
题解
官方给出的标签是数据结构...确实可以打个链表,但你发现$m<=100$,我们甚至暴力模拟都不会超时。
我们离线所有的操作,我们每读入一个询问,倒序操作模拟一遍就好了。
//It is made by Awson on 2017.9.30
#include <set>
#include <map>
#include <cmath>
#include <ctime>
#include <queue>
#include <stack>
#include <vector>
#include <cstdio>
#include <string>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <algorithm>
#define LL long long
#define Min(a, b) ((a) < (b) ? (a) : (b))
#define Max(a, b) ((a) > (b) ? (a) : (b))
using namespace std;
const int N = 2e5;
void read(int &x) {
char ch; bool flag = ;
for (ch = getchar(); !isdigit(ch) && ((flag |= (ch == '-')) || ); ch = getchar());
for (x = ; isdigit(ch); x = (x<<)+(x<<)+ch-, ch = getchar());
x *= -*flag;
} struct Query {
int id, l, r;
}query[N+];
int n, q, m, p;
int a[N+]; void work() {
read(n), read(q), read(m);
for (int i = ; i <= n; i++) read(a[i]);
for (int i = ; i <= q; i++)
read(query[i].id), read(query[i].l), read(query[i].r);
while (m--) {
scanf("%d", &p);
for (int i = q; i >= ; i--) {
if (query[i].l <= p && query[i].r >= p) {
if (query[i].id == ) {
if (query[i].l == p) p = query[i].r;
else p--;
}
else {
p = query[i].r-(p-query[i].l);
}
}
}
printf("%d ", a[p]);
}
printf("\n");
}
int main() {
work();
return ;
}
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