棋子等级

解题说明:

AC代码:

#include<iostream>
#include<algorithm>
#include<string.h>
using namespace std;
const int MAXN=1e5+10;
int c[MAXN],ans[MAXN],n;
int get(int x){
	int res=0;
	for(;x;x-=(x&-x)){
		res+=c[x];
	}
	return res;
}
void modify(int x,int num){
     if(x==0){
         c[x]+=num;
         x++;
     }
	for(;x<=MAXN;x+=(x&-x)){
		c[x]+=num; 
	}
}
int main(){
	ios::sync_with_stdio(false);
	cin>>n;
	memset(c,0,sizeof(c));
	memset(ans,0,sizeof(ans)); 
	int x,y;
	for(int i=1;i<=n;i++){
		cin>>x>>y;
	    int temp=get(x);
		ans[temp]++;
		modify(x,1);		
	}
	for(int i=0;i<n;i++){
		cout<<ans[i]<<endl;
	}
	return 0;
}

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转载自blog.csdn.net/zxk_hi/article/details/80251395