Submission #1119026

#	Time	Username	Problem	Language	Result	Execution time	Memory
1119026		Tsagana	Crazy old lady (IZhO13_crazy)	C++14	100 / 100	10 ms	596 KiB

crazy

#include<bits/stdc++.h>

#define IOS ios_base::sync_with_stdio(false);cin.tie();cout.tie();

using namespace std;


void solve () {
	int a[1001];
	int s[1001];
	int r = 0;
	int n; cin >> n;

	for (int i = 0; i < n; i++) cin >> a[i];
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= n; j++) s[j] = 0;
		s[a[0]] = 1;
		
		int j; for (j = 1; j < n; j++) {
			int k = j + (j >= i ? 1 : 0);
			if (!s[k] && a[j] != k) break;
			s[a[j]] = 1;
		}
		if (j == n) r = (r ? -1 : i);
	}
	cout << max(r, 0) << '\n';
}
int main() {IOS int t; cin >> t; while (t--) solve(); return 0;}

• Subtask 1: 100 / 100