Submission #23581807

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef long double ld;
#define endl "\n"
#define rep(i, n) for (int i = 0; i < n; i++)
//#define sort(v) sort(v.begin(), v.end());
//#define rsort(v) sort(v.rbegin(), v.rend());

void solve()
{
    ll n;
    cin >> n;
    ll sum = 0;
    for (int i = 0;; i++)
    {
        sum += i + 1;
        if (sum >= n)
        {
            cout << i + 1 << endl;
            return;
        }
    }
}

int main()
{

#ifndef ONLINE_JUDGE
    freopen("input.in", "r", stdin);
    freopen("output.in", "w", stdout);
#endif
    int t;
    t = 1;
    while (t--)
    {
        solve();
    }
}

Submission Info

Judge Result