【HDOJ 4970】 Killing Monsters

#include <iostream>
#include <cstdlib>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <queue>
#include <vector>
#include <cmath>
#define LL long long
#define INF 0x3f3f3f3f

using namespace std;

int st[233333],en[233333];
LL atc[233333];

int main()
{
    int i,j,n,l,r,x,k,cnt,m;
    LL h,mm;

    while(~scanf("%d",&n) && n)
    {
        memset(st,0,sizeof(st));
        memset(en,0,sizeof(en));
        scanf("%d",&m);
        while(m--)
        {
            scanf("%d %d %d",&l,&r,&x);
            st[l] += x;
            en[r] += x;
        }
        mm = 0;
        atc[0] = 0;
        for(i = 1; i <= n; ++i)
        {
            mm += st[i];
            mm -= en[i-1];

                atc[i] = atc[i-1] + mm;
        }
        cnt = 0;
        scanf("%d",&m);
        while(m--)
        {
            scanf("%I64d %d",&h,&x);

            if(h - (atc
 - atc[x-1]) > 0)
            {
                cnt++;
            }
        }
        printf("%d\n",cnt);
    }
    return 0;