Submission #204653

#	Time	Username	Problem	Language	Result	Execution time	Memory
204653		a_player	Gondola (IOI14_gondola)	C++14	75 / 100	26 ms	2420 KiB

gondola

#include <bits/stdc++.h>
#include "gondola.h"
#define f first
#define s second
#define mp make_pair
#define rep replacementSeq
#define MOD 1000000009

using namespace std;

typedef long long ll;
const int MAXN = 250e3+5;

bitset<MAXN> v;

int valid(int n, int inputSeq[])
{
    for(int i=0;i<n;i++){
        if(v[inputSeq[i]])return 0;
        v[inputSeq[i]]=1;
    }
    int mini=min_element(inputSeq,inputSeq+n)-inputSeq;
    int ans=1;
    if(inputSeq[mini]>n)return 1;
    int i=(mini-inputSeq[mini]+1+n)%n;
    for(int j=0;j<n-1;j++){
        if(inputSeq[(i+j)%n]>n||inputSeq[(i+j+1)%n]>n)continue;
        ans*=(inputSeq[(i+j)%n]+1==inputSeq[(i+j+1)%n]);
    }
    
    return ans;
}

//----------------------
vector<pair<int,int> > a;
int replacement(int n, int gondolaSeq[], int replacementSeq[])
{
  int ind=-1;
  for(int i=0;i<n;i++)if(gondolaSeq[i]<=n)ind=i;
  if(ind==-1){
    for(int j=0;j<n;j++)a.push_back(mp(gondolaSeq[j],j+1));
  }else{
  ind=(ind-gondolaSeq[ind]+1+n)%n;
  for(int j=0;j<n;j++)a.push_back(mp(gondolaSeq[(ind+j)%n],j+1));
  }
  sort(a.begin(),a.end());
  int id=0;
  int k=n;
  for(pair<int,int> x:a){
    if(x.f==x.s)continue;
      rep[id++]=x.s;
      for(k+=1;k<x.f;k++)rep[id++]=k;
  }
  return id;
}

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

ll pot(int n, int a){
  if(n==0)return 1;
  ll h=pot(n/2,a)%MOD;
  h=(h*h)%MOD;
  if(n%2)h=(h*(ll)a)%MOD;
  return h;
}

int countReplacement(int n, int inputSeq[])
{
  if(!valid(n,inputSeq))return 0;
  ll ans=1;
  sort(inputSeq,inputSeq+n);
  int k=n;
  for(int i=0;i<n;i++){
      if(inputSeq[i]<=k)continue;
      ans=(ans*pot(inputSeq[i]-k-1,n-i))%MOD;
      k=inputSeq[i];
  }
  return ans%MOD;
}

• 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: 15 / 15
• Subtask 9: 0 / 15
• Subtask 10: 0 / 10