Submission

Score: 100

User: nemuchannnUwU

Problemset: กองส้ม

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-17 10:24:04

#include<bits/stdc++.h>
#define ll long long
using namespace std;
int main(){
	cin.tie(nullptr)->sync_with_stdio(0);
	cout.tie(nullptr)->sync_with_stdio(0);
	ll n,m; cin >> n >> m;
	vector<ll> v(n+1);
	v[0]=0;
	for (ll i=1;i<=n;i++) v[i]=i*i;
	ll x=n+1;
	ll sum=0;
	for (ll i=1;i<=n;i++){
		sum+=v[i];
		if (sum>m){
			x=i;
			break;
		}
	}
	cout << n-x+1;
}