Submission #2121652

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Source Code Expand

#include <math.h>
#include <ctype.h>
#include <bits/stdc++.h>
using namespace std;
#define FOR(i, a, n) for (int i = a; i < n; i++)
#define REP(i, n) for(int i = 0; i < n; i++)

int main(){
    int x;
    cin >> x;

    long long total = 0;
    int i = 1;
    while(1){
        total += i;
        if(x <= total) break;
        else i++;
    }
    cout << i << endl;


    return 0;
}

Submission Info

Judge Result