Submission

Score: 100

User: lingusso

Problemset: กองส้ม

Language: cpp

Time: 0.003 second

Submitted On: 2026-03-25 13:58:03

#include<iostream>
#include<string>
using namespace std;

int main(){
	int n,a;
	cin>>n>>a;
	int l[n];
	for(int i=0;i<n;i++){
		l[i] = (i+1)*(i+1);
	}
	int b=a;
	for(int i=1;i<=n;i++){
		b -= i*i;
	}
	if(b == 0){
		cout<<0;
	}
	for(int i=0;i<n;i++){
		if(a<l[i]){
			cout<<n-i;
			return 0;
		}
		a = a-l[i];
	}
	return 0;
}