Matrix Time Limit: 3000MS Memory Limit: 65536K Total Submissions: 17880 Accepted: 6709 Description Given an N*N matrix A, whose elements are either 0 or 1. A[i, j] means the number in the i-th row and j-th column. Initially we have A[i, j] = 0 (1…
Matrix Time Limit: 3000MS Memory Limit: 65536K Total Submissions: 17226 Accepted: 6461 Description Given an N*N matrix A, whose elements are either 0 or 1. A[i, j] means the number in the i-th row and j-th column. Initially we have A[i, j] = 0 (1…
http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=1859 Matrix Searching Time Limit: 10 Seconds Memory Limit: 32768 KB Given an n*n matrix A, whose entries Ai,j are integer numbers ( 1 <= i <= n, 1 <= j <= n ). An operation FIND t…
题目传送门 题意:训练指南P207 分析:因为矩阵不超过20行,所以可以建20条线段的线段树,支持两个区间更新以及区间查询. #include <bits/stdc++.h> using namespace std; #define lson l, mid, o << 1 #define rson mid + 1, r, o << 1 | 1 typedef long long ll; const int INF = 0x3f3f3f3f; const int N =…