Submission #1307640

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Source Code Expand

#include "bits/stdc++.h"
#include <regex>
#define _USE_MATH_DEFINES
#include <math.h>

using namespace std;

#ifndef _DEBUG
#define main_ main
#endif
#define FOR(i,s,e) for (int i = int(s); i != int(e); i++)
#define INF (INT_MAX/2)
#define EPS (1.0e-8)
#define LINF (LONG_MAX/2)

typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<bool> vb;
typedef vector<string> vs;

template <typename T>
using keyVal = pair<string, T>;
template<typename T>
bool val_greater(const keyVal<T>& left, const keyVal<T>& right) {
	return left.second > right.second;
}

void init_global() {}

int main_() {
	cin.tie(0);
	ios::sync_with_stdio(false);

	int N; cin >> N;

	const int R = sqrt(N);

	int ans = INF;
	int w = R, h = R;
	while (w <= N) {
		while (w*h > N) h--;
		if (h < 1) break;

		int d = w - h;
		int m = N - (w*h);
		ans = min(ans, d + m);
		w++;
	}

	cout << ans << endl;
	return 0;
}

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