Submission #285640

#	Time	Username	Problem	Language	Result	Execution time	Memory
285640		amoo_safar	Gondola (IOI14_gondola)	C++17	40 / 100	29 ms	1808 KiB

gondola

#include "gondola.h"

#include <bits/stdc++.h>
#define pb push_back

using namespace std;

int valid(int n, int a[]){
	vector<int> A, S;
	for(int i = 0; i < n; i++) A.pb(a[i]);
	sort(A.begin(), A.end());
	for(int i = 0; i + 1 < n; i++) if(A[i] == A[i + 1]) return 0;
	for(int i = 0; i < n; i++) if(a[i] <= n) S.pb((i - a[i] + n) % n);
	sort(S.begin(), S.end());
	for(int i = 0; i + 1 < (int) S.size(); i++) if(S[i] != S[i + 1]) return 0;
	return 1;
}

//----------------------

const int MX = 250010;
int replacement(int n, int a[], int ans[]){
	int L = (*max_element(a, a + n)) - n;
	vector<int> mk(MX, 0);
	for(int i = 0; i < n; i++)
		mk[a[i]] = 1;
	int idx = 0;
	return L;
}

//----------------------

const int Mod = 1e9 + 9;
int countReplacement(int n, int a[]){
	if(!valid(n, a)) return 0;
	vector<int> A, S;
	for(int i = 0; i < n; i++) A.pb(a[i]);
	sort(A.begin(), A.end());
	int mx = A.back();
	int res = 1;
	for(int i = n + 1; i < mx; i++){
		int idx = lower_bound(A.begin(), A.end(), i) - A.begin();
		if(A[idx] == i) continue;
		res = (1ll * res * (n - idx)) % Mod;
	}
	return res;
}

Compilation message (stderr)

gondola.cpp: In function 'int replacement(int, int*, int*)':
gondola.cpp:27:6: warning: unused variable 'idx' [-Wunused-variable]
   27 |  int idx = 0;
      |      ^~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 10 / 10
• Subtask 4: 0 / 5
• Subtask 5: 0 / 10
• Subtask 6: 0 / 20
• Subtask 7: 5 / 5
• Subtask 8: 15 / 15
• Subtask 9: 0 / 15
• Subtask 10: 0 / 10