Submission #1198405

#	Time	Username	Problem	Language	Result	Execution time	Memory
1198405		TahirAliyev	Gondola (IOI14_gondola)	C++20	40 / 100	35 ms	6212 KiB

gondola

#include "gondola.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int MOD = 1e9 + 9;

int valid(int n, int arr[]){
    set<int> s;
    set<int> s2;
    int cnt = 0;
    for(int i = 0; i < n; i++){
        if(arr[i] <= n) s.insert((arr[i] - i + n) % n);
        else cnt++;
        s2.insert(arr[i]);
    }
    if(!(s2.size() == n && s.size() == 1)) return 0;
    return 1;
}

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

int replacement(int n, int gondolaSeq[], int replacementSeq[])
{
  return -2;
}

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

ll binpow(ll a, ll b){
    ll res = 1;
    while(b){
        if(b & 1) res = res * a % MOD;
        b /= 2; 
        a = a * a % MOD;
    }
    return res;
}

int countReplacement(int n, int arr[]){
    set<int> s;
    set<int> s2;
    vector<int> v;
    for(int i = 0; i < n; i++){
        if(arr[i] <= n) s.insert((arr[i] - i + n) % n);
        else v.push_back(arr[i]);
        s2.insert(arr[i]);
    }
    if(!(s2.size() == n && s.size() == 1)) return 0;
    sort(v.begin(), v.end());
    v.insert(v.begin(), n);
    ll ans = 1;
    for(int i = 1; i < v.size(); i++){
        ans = ans * binpow(v.size() - i, v[i] - v[i - 1] - 1) % MOD;
    }
    if(n == v.size() - 1 && v[1] == n + 1) ans = ans * n % MOD;
    return ans;
}

• 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