Submission #254528

#	Time	Username	Problem	Language	Result	Execution time	Memory
254528		b00n0rp	Gondola (IOI14_gondola)	C++17	65 / 100	61 ms	6008 KiB

gondola

#include "gondola.h"
#include<bits/stdc++.h>
using namespace std;

#define ll long long

int valid(int n, int inputSeq[]){
	set<int> s;
	for(int i = 0; i < n; i ++){
		s.insert(inputSeq[i]);
	}
	if(s.size() != n) return 0;
	for(int i = 0; i < n; i ++){
		if(inputSeq[i] <= n){
			for(int j = i+1; j != i; j = (j+1)%n){
				if(inputSeq[j] > n) continue;
				if(inputSeq[j] != ((inputSeq[i]+(j-i)+n-1)%n)+1) return 0;
			}
			return 1;
		}
	}
	return 1;
}

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

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

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

const ll MOD = 1000000009;

ll power(int x,int y){
	if(y == 0) return 1;
	if(y == 1) return x;
	ll cur = power(x,y/2);
	cur = (cur*cur)%MOD;
	if(y%2) cur = (cur*x)%MOD;
	return cur;
}

int countReplacement(int n, int inputSeq[]){
	if(!valid(n,inputSeq)) return 0;
	ll ans = 1;
	int cur = 0;
	vector<int> v;
	for(int i = 0; i < n; i ++){
		if(inputSeq[i] <= n) continue;
		v.push_back(inputSeq[i]);
	}
	if(v.empty()) return 1;
	sort(v.begin(),v.end());
	if(v.size() == n) ans = n;
	ans = (ans*power(v.size(),v[0]-n-1))%MOD;
	for(int i = 1; i < v.size(); i ++){
		ans = (ans*power(v.size()-i,v[i]-v[i-1]-1))%MOD;
	}
	return ans;
}

Compilation message (stderr)

gondola.cpp: In function 'int valid(int, int*)':
gondola.cpp:12:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(s.size() != n) return 0;
     ~~~~~~~~~^~~~
gondola.cpp: In function 'int countReplacement(int, int*)':
gondola.cpp:56:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(v.size() == n) ans = n;
     ~~~~~~~~~^~~~
gondola.cpp:58:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 1; i < v.size(); i ++){
                 ~~^~~~~~~~~~
gondola.cpp:48:6: warning: unused variable 'cur' [-Wunused-variable]
  int cur = 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: 15 / 15
• Subtask 10: 10 / 10