题目链接:点击打开链接 题意:给定n*m的二维平面 w个操作 int mp[n][m] = { 0 }; 1.0 (x1,y1) (x2,y2) value for i : x1 to x2 for j : y1 to y2 mp[i][j] += value; 2.1 (x1, y1) (x2 y2) ans1 = 纵坐标在 y1,y2间的总数 ans2 = 横坐标不在x1,x2间的总数 puts(ans1-ans2); more format: for i : 1 to n for j :…
题目描述 You have N integers, A1, A2, ... , AN. You need to deal with two kinds of operations. One type of operation is to add some given number to each number in a given interval. The other is to ask for the sum of numbers in a given interval. Input The…
Color the ball Time Limit: 9000/3000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 15145 Accepted Submission(s): 7540 Problem Description N个气球排成一排,从左到右依次编号为1,2,3....N.每次给定2个整数a b(a <= b),lele便为骑上他的“小飞鸽"牌电动车从气…
水题,练习一下树状数组实现区间更新. 对于每个区间,区间左端点+1,右端点的后一位-1,查询每个位置的覆盖次数 #include <cstdio> #include <cstring> ; int N, C[MAXN]; int lowbit( int x ) { return (-x)&x; } void update(int x, int add) { for(int i = x; i <= N; i += lowbit(i)) C[i] += add; retu…