HDU1556 color the ball（区间修改，单点查询）

#include <iostream>
#include <algorithm>
#include <cstring>
#include <cmath>
#include <queue>
#include <vector>
#include <cstdio>
#define MAXN 100005
int c[MAXN];
int lowbit(int x)
{
    return x&(-x);
}
void update(int x,int num)
{
    while(x>0)
     {
         c[x]+=num;
         x-=lowbit(x);
     }
}
int getSum(int x)
{
    int s=0;
    while(x<=MAXN)
     {
         s+=c[x];
         x+=lowbit(x);
     }
    return s;
}
int main()
{
    //freopen("in.txt","r",stdin);
    int n,a,b;
    while(~scanf("%d",&n)&&n)
    {
        memset(c,0,sizeof(c));
        for(int j=1; j<=n; j++)
        {
            scanf("%d%d",&a,&b);
            update(b,1);
            update(a-1,-1);
        }
        for(int i=1; i<n; i++) printf("%d ",getSum(i));
        printf("%d
",getSum(n));
    }
    return 0;
}