Submission #194159

#	Time	Username	Problem	Language	Result	Execution time	Memory
194159		oscarsierra12	Gondola (IOI14_gondola)	C++14	60 / 100	68 ms	5104 KiB

gondola

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

typedef pair<int,int>          pii ;
int arr[300000] ;
const int MOD = 1e9+7 ;

int valid(int n, int inputSeq[])
{
  int x = min_element ( inputSeq, inputSeq+n ) - inputSeq ;
  vector <int> nwSeq ;
  set <int> rep ;
  for ( int i = x ; i < n ; ++i ) nwSeq.push_back ( inputSeq[i] ), rep.insert ( inputSeq[i] ) ;
  for ( int i = 0 ; i < x ; ++i ) nwSeq.push_back ( inputSeq[i] ), rep.insert ( inputSeq[i] ) ;
  int expected = inputSeq[x] ;
  int posible = ( (int)rep.size()==n ) ;
  for ( int i = 0 ; i < n ; ++i ) {
    if ( nwSeq[i] <= n ) {
        if ( nwSeq[i] != expected ) posible = 0 ;
        expected = nwSeq[i]+1 ;
    }
    else expected++ ;
  }
  return posible;
}

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

int replacement(int n, int gondolaSeq[], int replacementSeq[])
{
  int x = min_element ( gondolaSeq, gondolaSeq+n ) - gondolaSeq ;
  int beg = 1 ;
  if ( gondolaSeq[x] <= n ) beg = gondolaSeq[x] ;
  vector <int> nwSeq ;
  for ( int i = x ; i < n ; ++i ) nwSeq.push_back ( gondolaSeq[i] ) ;
  for ( int i = 0 ; i < x ; ++i ) nwSeq.push_back ( gondolaSeq[i] ) ;
//  cout << beg << '\n' ;
  vector <pii> posib ;
  for ( int i = 0 ; i < n ; ++i ) {
    if ( nwSeq[i] != beg ) posib.push_back ( {nwSeq[i], beg} ) ;
    beg++ ;
    if ( beg > n ) beg = 1;
  }
  sort ( posib.begin(), posib.end() ) ;
  int ans = 0, id = 0;
  for ( auto i:posib ) {
//    cout << i.first << ' ' << i.second << '\n' ;
    replacementSeq[id] = i.second ;
    n++ ;
    ++ans ;
    while ( n < i.first ) {
        ++id ;
        replacementSeq[id] = n ;
        ++n ;
        ++ans ;
    }
    ++id ;
  }
  return ans;
}

long long fpow( long long q, long long cur ) {
    if ( cur == 1 ) return q ;
    if ( cur == 0 ) return 1 ;
    long long izq = fpow(q, cur/2) ;
    long long ot = (cur%2)*q ;
    return (((izq*izq)%MOD)*ot)%MOD ;
}
//----------------------

int countReplacement(int n, int inputSeq[])
{
    if ( valid(n, inputSeq) == 0 ) return 0 ;
    if ( replacement (n,inputSeq,arr) == 0 ) return 1 ;
    sort ( inputSeq, inputSeq + n ) ;
    long long ans = 1 ;
    if ( inputSeq[0] > n ) ans = n ;
    int nRep = n ;
    for ( int i = 0 ; i < nRep ; ++i ) {
        long long cur = inputSeq[i] - n ;
        if ( cur <= 0 ) continue ;
        cur-- ;
        long long q = nRep-i ;
        n = inputSeq[i] ;
        ans *= (fpow(q,cur)%MOD) ;
        ans %= MOD;
    }
    return ans ;
}

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