POJ2352——树状数组——Stars

http://poj.org/problem?id=2352

模板

/************************************************
* Author        :Powatr
* Created Time  :2015-8-13 16:18:10
* File Name     :POJ2352stars.cpp
 ************************************************/

#include <cstdio>
#include <algorithm>
#include <iostream>
#include <sstream>
#include <cstring>
#include <cmath>
#include <string>
#include <vector>
#include <queue>
#include <deque>
#include <stack>
#include <list>
#include <map>
#include <set>
#include <bitset>
#include <cstdlib>
#include <ctime>
using namespace std;

#define lson l, mid, rt << 1
#define rson mid + 1, r, rt << 1 | 1
typedef long long ll;
const int MAXN = 1e5 + 10;
const int INF = 0x3f3f3f3f;
const int MOD = 1e9 + 7;
const int m = 32000 + 10;

int level[MAXN];
int C[MAXN];

int query(int x)
{   
    int ret = 0;
    while( x > 0){
        ret += C[x];
        x -= x&-x;
    }
    return ret;
}

void update(int x)
{
    while( x <= m){
        C[x]++;
        x += x&-x;
    }
}

int main(){
    int n;
    while(~scanf("%d", &n)){
        memset(level, 0, sizeof(level));
        memset(C, 0, sizeof(C));
    int x, y;
    for(int i = 1; i <= n; i++){
        scanf("%d%d", &x, &y);
        level[query(x+1)]++;
        update(x+1);
    }
    for(int i = 0; i < n; i++)
        printf("%d
",level[i]);
    } 
   return 0;
}