Submission #1966273

---

Source Code Expand

/*  ***  In The Name of God ... ***  */ 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;


#define int long long
#define all(v) v.begin() , v.end()
#define pb push_back
#define endl '\n' 
template<typename T> inline bool smin(T &a, const T &b){ return b < a ? a = b,1:0;}
template<typename T> inline bool smax(T &a, const T &b){ return a < b ? a = b,1:0;}

int n ; 

int32_t main()
{
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	cin >> n ;
	for ( int i = 1 ; i <= 100 * 1000 + 10 ; i++ ) {
		if ( i * ( i + 1 ) / 2 >= n )
			return cout << i , 0 ;
	}
}

Submission Info

Judge Result