oj.uz

Submission #690488

# Submission time Handle Problem Language Result Execution time Memory
690488 2023-01-30T08:27:54 Z Kalashnikov Crazy old lady (IZhO13_crazy) C++17
100 / 100
 23 ms 380 KB 
#include <bits/stdc++.h>
 
#define ios ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
#define all(a) a.begin() , a.end()
#define F first
#define S second
 
using namespace std;
using ll = long long;
 
const int N = 2e5+5 , inf = 2e9 + 7;
const ll INF = 1e18 ,   mod = 1e9+7 , P = 6547;

int p[N];
int p1[N];

void solve(int tc) {
	int n;
	cin >> n;
	for(int i = 1; i <= n; i ++) {
		cin >> p[i];
	}
	vector<int> vec;
	for(int i = 1; i <= n; i ++) {
		p1[1] = i;
		int cur = 1;
		for(int j = 2; j <= n; j ++) {
			if(cur == i) cur ++;
			p1[j] = cur;
			cur ++;
		}
		vector<int> u(n+1 , 0);
		u[p[1]] = 1;
		int ok = 1;
		for(int j = 2; j <= n; j ++) {
			if(u[p1[j]] == 0) {
				if(p[j] != p1[j]) {
					ok = 0;
					break;
				}
				u[p[j]] = 1;
			}
			else {
				if(u[p[j]] == 1) {
					ok = 0;
					break;
				}
				u[p[j]] = 1;
			}
		}
		if(ok) vec.push_back(i);
	}
	if(vec.size() == 1) {
		cout << vec[0] << '\n';
	}
	else cout << "0\n";
	
}
/*
*/
main() {
	file("crazy");
    ios;
    int tt = 1 , tc = 0;
    cin >> tt;
    while(tt --) {
        solve(++tc);
    }
    return 0;
}

Compilation message

crazy.cpp:62:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   62 | main() {
      | ^~~~
crazy.cpp: In function 'int main()':
crazy.cpp:4:48: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    4 | #define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
      |                                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~
crazy.cpp:63:2: note: in expansion of macro 'file'
   63 |  file("crazy");
      |  ^~~~
crazy.cpp:4:77: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    4 | #define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
      |                                                                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
crazy.cpp:63:2: note: in expansion of macro 'file'
   63 |  file("crazy");
      |  ^~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 328 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 2 ms 344 KB Output is correct
9 Correct 3 ms 340 KB Output is correct
10 Correct 3 ms 340 KB Output is correct
11 Correct 4 ms 340 KB Output is correct
12 Correct 4 ms 340 KB Output is correct
13 Correct 6 ms 340 KB Output is correct
14 Correct 7 ms 344 KB Output is correct
15 Correct 10 ms 340 KB Output is correct
16 Correct 12 ms 380 KB Output is correct
17 Correct 12 ms 340 KB Output is correct
18 Correct 19 ms 340 KB Output is correct
19 Correct 16 ms 340 KB Output is correct
20 Correct 23 ms 340 KB Output is correct