Yet Another Array Queries Problem CodeForces - 863D (暴力/思维)
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 alibecomes 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.
Example
6 3 5
1 2 3 4 5 6
2 1 3
2 3 6
1 1 6
2 2 1 5 3
3 3 1 5 2
题意:
对一个数组,有两种操作,1:翻转 2 左移
问所有操作完成后,位置p的数是多大.
思路:
对于当前操作,之后的操作与之无关,所以直接暴力反推,p由哪个位置转移来即可
#include<iostream> #include<algorithm> #include<vector> #include<stack> #include<queue> #include<map> #include<set> #include<cstdio> #include<cstring> #include<cmath> #include<ctime> #define fuck(x) cerr<<#x<<" = "<<x<<endl; #define debug(a, x) cerr<<#a<<"["<<x<<"] = "<<a[x]<<endl; #define ls (t<<1) #define rs ((t<<1)|1) using namespace std; typedef long long ll; typedef unsigned long long ull; const int loveisblue = 486; const int maxn = 200086; const int maxm = 100086; const int inf = 0x3f3f3f3f; const ll Inf = 999999999999999999; const int mod = 1000000007; const double eps = 1e-6; const double pi = acos(-1); int num[maxn]; struct node{ int l,r,type; }a[maxn]; int main() { // ios::sync_with_stdio(false); // freopen("in.txt", "r", stdin); int n,q,m; scanf("%d%d%d",&n,&q,&m); for(int i=1;i<=n;i++){ scanf("%d",&num[i]); } for(int i=1;i<=q;i++){ scanf("%d%d%d",&a[i].type,&a[i].l,&a[i].r); } while (m--){ int x; scanf("%d",&x); for(int i=q;i>=1;i--){ if(a[i].l>x||a[i].r<x){ continue;} if(a[i].type==1){ if(a[i].l==x){ x=a[i].r; }else { x--; } }else{ int y = a[i].r - x; x = a[i].l+y; } } printf("%d ",num[x]); } return 0; }
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