Submission #1247438

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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 vector<int> vi;
typedef vector<vi> vvi;

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_() {
	int N;
	cin >> N;
	vi a(N);
	int sum = 0;
	FOR(i, 0, N) {
		cin >> a[i];
		sum += a[i];
	}

	if (sum%N != 0) {
		cout << -1 << endl;
		return 0;
	}
	int av = sum / N;

	vector<bool> bg(N-1, false);
	FOR(i, 0, N-1) {
		int left = 0;
		FOR(j, 0, i+1) {
			left += a[j];
		}
		if (av*(i + 1) != left) bg[i] = true;
	}

	int ans = 0;
	for(auto e : bg) {
		if (e) ans++;
	}
	cout << ans << endl;
	return 0;
}

Submission Info

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