前缀和

前缀和

题目连接：http://www.noobdream.com/DreamJudge/Issue/page/1209/#

#include <iostream>
#include <string>
#include <math.h>
#include <algorithm>
#include <vector>
const int N = 200005;

int wall[N];
int b[N],e[N];


using namespace std;

int main() {
    
    int B,E;
    while(scanf("%d%d", &B, &E) && (B || E)) {
        wall[B]++;wall[E+1]--;
    }
    for (int i = 1; i < N; i++) wall[i]+=wall[i-1];
    while(scanf("%d%d", &B, &E) && (B || E)) {
        for (int i = B; i <= E; i++)
            printf("%d
", wall[i]);
    }
            
    
    return 0;
}