标签:windows += 数组 oid 进制 hub names ble cout
1代表建一个屏障,2代表去掉一个屏障,3询问是否两点相通。
仿造一维询问是否在同一区间的问题扩展到二维,树状数组维护区间标记即可,标记值可以直接2500进制不会爆LL。
/** @Date : 2017-10-09 21:03:38 * @FileName: 869E 二维树状数组.cpp * @Platform: Windows * @Author : Lweleth (SoungEarlf@gmail.com) * @Link : https://github.com/ * @Version : $Id$ */ #include <bits/stdc++.h> #define LL long long #define PII pair<int ,int> #define MP(x, y) make_pair((x),(y)) #define fi first #define se second #define PB(x) push_back((x)) #define MMG(x) memset((x), -1,sizeof(x)) #define MMF(x) memset((x),0,sizeof(x)) #define MMI(x) memset((x), INF, sizeof(x)) using namespace std; const int INF = 0x3f3f3f3f; const int N = 1e5+20; const double eps = 1e-8; LL C[2510][2510]; LL n, m, q; void add(LL x, LL y, LL val) { while(x <= n) { LL ty = y;//别直接用y阿... while(ty <= m) { C[x][ty] += val; ty += ty & (-ty); } x += x & (-x); } } void fill(LL x1, LL y1, LL x2, LL y2, LL v) { add(x1, y1, v); add(x2 + 1, y2 + 1, v); add(x1, y2 + 1, -v); add(x2 + 1, y1, -v); } LL query(LL x, LL y) { LL ans = 0; while(x > 0) { LL ty = y; while(ty > 0) { ans += C[x][ty]; ty -= ty & (-ty); } x -= x & (-x); } return ans; } int main() { MMF(C); cin >> n >> m >> q; LL t, x1, x2, y1, y2; for(int i = 0; i < q; i++) { scanf("%lld%lld%lld%lld%lld", &t, &x1, &y1, &x2, &y2); LL val = x1 + y1*2500LL + x2*2500LL*2500LL + y2*2500LL*2500LL*2500LL; //cout << val << endl; if(t <= 2) fill(x1, y1, x2, y2, val*(t==1?1:-1)); else printf("%s\n", (query(x1, y1)==query(x2, y2)?"Yes":"No") ); } return 0; }
标签:windows += 数组 oid 进制 hub names ble cout
原文地址:http://www.cnblogs.com/Yumesenya/p/7643309.html