Submission #1166497

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Source Code Expand

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<map>
#include<set>
#include<functional>
#include<unordered_map>
#include<unordered_set>
#include<queue>
#include<vector>
using namespace std;

signed main() {
	int a; cin >> a;
	int sum = 0;
	for (int b = 1;; b++) {
		sum += b;
		if (sum >= a) { cout << b << endl; return 0; }
	}
}

Submission Info

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