Submission #339762

#	Time	Username	Problem	Language	Result	Execution time	Memory
339762		tengiz05	Crazy old lady (IZhO13_crazy)	C++17	100 / 100	31 ms	444 KiB

crazy

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define FASTIO ios_base::sync_with_stdio(false); cin.tie(NULL);
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define pii pair<int, int>
#define ff first
#define ss second
#define PI acos(-1)
#define ld long double
template<class T> bool chmin(T& a, const T& b) {return a>b? a=b, true:false;}
template<class T> bool chmax(T& a, const T& b) {return a<b? a=b, true:false;}
const int mod = 1e9+7, N = 2e5+5;
int msb(int val){return sizeof(int)*8-__builtin_clzll(val)-1;}
int a[N], n, m, k;

void solve(int test_case){
	int i, j;
	cin >> n;
	for(i=1;i<=n;i++){
		cin >> a[i];
	}
	vector<int> ans;
	for(int place_of_lady = 1; place_of_lady <= n; place_of_lady++){
		vector<int> num(n+1);
		num[1] = place_of_lady;
		int cnt=1;
		for(i=2;i<=n;i++){
			if(cnt == place_of_lady)cnt++;
			num[i] = cnt;cnt++;
		}
		vector<bool> used(n+1, 0);
		used[a[1]] = true;
		bool bolot = true;
		for(i=2;i<=n;i++){
			if(!used[num[i]] && a[i] != num[i]){
				bolot = false;
				break;
			}else if(!used[a[i]]){
				used[a[i]] = true;
			}
		}
		if(bolot)ans.pb(place_of_lady);
	}
	assert(ans.size() > 0);
	if(ans.size() > 1){
		cout << 0 << '\n';
	}else {
		cout << ans[0] << '\n';
	}
	return;
}

signed main(){
	FASTIO;
#define MULTITEST 1
#if MULTITEST
	int _T;
	cin >> _T;
	for(int T_CASE = 1; T_CASE <= _T; T_CASE++)
		solve(T_CASE);
#else
	solve(1);
#endif
	return 0;
}

Compilation message (stderr)

crazy.cpp: In function 'void solve(long long int)':
crazy.cpp:19:9: warning: unused variable 'j' [-Wunused-variable]
   19 |  int i, j;
      |         ^

• Subtask 1: 100 / 100