oj.uz

답안 #339950

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
339950 2020-12-26T12:02:50 Z amunduzbaev 성질 급한 지학이 (IZhO13_crazy) C++14
100 / 100
 16 ms 492 KB 
/** made by amunduzbaev **/
 
#include <bits/stdc++.h>
//~ #include <ext/pb_ds/assoc_container.hpp> 
//~ #include <ext/pb_ds/tree_policy.hpp> 
//~ #include <ext/rope>
 
//~ using namespace __gnu_pbds;
//~ using namespace __gnu_cxx;
using namespace std;
 
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define ub upper_bound
#define lb lower_bound
#define ll long long
#define ld long double
#define pii pair<int, int>
#define pll pair<ll, ll>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(),x.rend()
#define fastios ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define vll vector<ll>
#define vii vector<int>
#define vpii vector<pii>
#define vpll vector<pll>
#define cnt(a)__builtin_popcount(a)
template<class T> bool umin(T& a, const T& b) {return a > b? a = b, true:false;}
template<class T> bool umax(T& a, const T& b) {return a < b? a = b, true:false;}
 
//~ typedef tree<pii,null_type,less<pii>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
 
const int N = 1e3+5;
const int mod = 1e9+7;
const ll inf = 1e18;
const ld Pi = acos(-1);
int s, n, m, k, t, a[N], used[N], tt[N];
vii ans; 
void solve(){
	cin>>n;
	
	for(int i=1;i<=n;i++) cin>>a[i]; 
	
	for(int i=1;i<=n;i++){
		tt[1] = i; 
		used[i] = 1;
		for(int j = 1, cnt = 2;j<=n;j++) {
			if(used[j]) continue;
			tt[cnt++] = j;
		}
		
		memset(used, 0, sizeof used);
		used[a[1]] = 1;
		bool ok = 1;
		for(int j=2;j<=n;j++){
			if(a[j] == tt[j]) continue;
			if(used[tt[j]]){
				used[a[j]] = 1;
				continue;
			}else if(tt[j] != a[j]){ ok = 0; break; }
		}
		if(ok) ans.pb(i);
		memset(used, 0, sizeof used);
	}
	if(sz(ans) > 1) cout<<0<<"\n";
	else cout<<ans[0]<<"\n";
	ans.clear();
	return;
}
 
int main(){
	fastios
	int t = 0;
	if(t) solve();
	else {
		cin>>t;
		while (t--) solve();
	}
	return 0;
}

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 2 ms 492 KB Output is correct
8 Correct 2 ms 364 KB Output is correct
9 Correct 3 ms 364 KB Output is correct
10 Correct 3 ms 364 KB Output is correct
11 Correct 4 ms 364 KB Output is correct
12 Correct 5 ms 364 KB Output is correct
13 Correct 7 ms 364 KB Output is correct
14 Correct 7 ms 364 KB Output is correct
15 Correct 8 ms 492 KB Output is correct
16 Correct 12 ms 364 KB Output is correct
17 Correct 12 ms 384 KB Output is correct
18 Correct 16 ms 364 KB Output is correct
19 Correct 12 ms 364 KB Output is correct
20 Correct 15 ms 364 KB Output is correct