Submission

[P-SSSSSSSS][-SSSS]

Score: 0

User: Jibhong

Problemset: ขนมของเซ้น143 (v.ยาก)

Language: cpp

Time: 0.002 second

Submitted On: 2024-12-14 10:46:33

#include <bits/stdc++.h>
using namespace std;

#define ull unsigned long long

int main(){
    
    ull n;
    cin>>n;
    ull mx=n*(n+1)/2;
    
    ull half=(sqrt(8*mx/2+1))/2;
    cout<<half;
    
    
    return 0;
}