Submission #385864

#	Time	Username	Problem	Language	Result	Execution time	Memory
385864		mehrdad_sohrabi	Gondola (IOI14_gondola)	C++14	45 / 100	25 ms	1768 KiB

gondola

// Black lives matter
#include <bits/stdc++.h>
#include "gondola.h"
using namespace std;
typedef long long int ll;
typedef complex<double> point;
typedef long double ld;
#define pb push_back
#define pii pair < ll , ll >
#define F first
#define S second
//#define endl '\n'
#define int long long
#define sync ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math")
#define kill(x) return cout<<x<<'\n', 0;
const int N=25e4+10;
ll mod=1e9+9;
int32_t valid(int32_t n, int32_t input[]){
    ll id=-1;
    for (int i=0;i<n;i++){
        if (input[i]<=n){
            id=i;
        }
    }
    ll z=input[id]-id+n;
    z%=n;
    for (int i=0;i<n;i++){
        if (input[i]<=n){
            ll f=input[i]-i+n;
            f%=n;
            if (f!=z) return 0;
        }
    }
    vector <int> a;
    for (int i=0;i<n;i++){
        a.pb(input[i]);
    }
    sort(a.begin(),a.end());
    for (int i=1;i<a.size();i++){
        if (a[i]==a[i-1]) return 0;
    }
    return 1;
}
ll ja[N];
int32_t WW[N];
ll val[N];
int32_t replacement(int32_t n, int32_t input[], int32_t replacementSeq[]){
    vector <int> a;
    ll id=-1;

    for (int i=0;i<n;i++){
        val[i+1]=i+1;
        if (input[i]<=n) id=i;
    }
    if (id!=-1){
        val[id+1]=input[id];
        ll z=input[id];
     //   cout << z << endl;
        for (int i=(id+1)%n;i!=id;i=(i+1)%n){
            z++;
            if (z==n+1) z=1;
            val[i+1]=z;
        }
    //    for (int i=1;i<=n;i++) cout << val[i] << " ";
      //  cout << endl;
    }
    for (int i=0;i<n;i++){
        ja[input[i]]=val[i+1];
        a.pb(input[i]);
    }
    sort(a.begin(),a.end());
    vector <int> ans;
    deque <int> b;
    ll z=a.back();
    while(z>n){
        if (z==a.back()){
            a.pop_back();
            b.pb(z);
        //    cout << z << endl;
        }
        else{
            ans.pb(z);
            ja[z]=ja[b.front()];
            b.pop_front();
            b.pb(z);
        }
        z--;
    }
    sort(b.begin(),b.end());
    reverse(b.begin(),b.end());
    for (auto u : b){
        ans.pb(ja[u]);
    }
    reverse(ans.begin(),ans.end());
    for (int i=0;i<ans.size();i++){
        replacementSeq[i]=ans[i];
    }
    return ans.size();
}

int32_t countReplacement(int32_t n, int32_t input[]){
    ll id=-1;
    for (int i=0;i<n;i++){
        if (input[i]<=n){
            id=i;
        }
    }
    ll z=input[id]-id+n;
    z%=n;
    for (int i=0;i<n;i++){
        if (input[i]<=n){
            ll f=input[i]-i+n;
            f%=n;
            if (f!=z) return 0;
        }
    }
    vector <int> a;
    for (int i=0;i<n;i++){
        a.pb(input[i]);
    }
    sort(a.begin(),a.end());
    for (int i=1;i<a.size();i++){
        if (a[i]==a[i-1]) return 0;
    }
    ll ans=1;
    z=a.back();
    ll cnt=0;
    while(z>n){
        if (a.back()==z){
            a.pop_back();
            cnt++;
        }
        else{
            ans*=cnt;
            ans%=mod;
        }
        z--;
    }
    if (id==-1){
        for (int i=1;i<=n;i++){
            ans*=i;
            ans%=mod;
        }
    }
    return ans;
}
/*
int32_t in[N];
int32_t main(){
    ll n;
    cin >> n;
    for (int i=1;i<=n;i++){
        cin >> in[i-1];
    }
    ll z=replacement(n,in,WW);
    cout << z << endl;
    for (int i=0;i<z;i++) cout << WW[i] << " ";
}
*/
/*

int gondolaSequence[100001];
int replacementSequence[250001];

int32_t main()
{
  int i, n, tag;
  int nr;
  assert(scanf("%d", &tag)==1);
  assert(scanf("%d", &n)==1);
  for(i=0;i< n;i++)
    assert( scanf("%d", &gondolaSequence[i]) ==1);

  switch (tag){
  case 1: case 2: case 3:
    printf("%d\n", valid(n, gondolaSequence));
    break;

  case 4: case 5: case 6:
    nr = replacement(n, gondolaSequence, replacementSequence);
    printf("%d ", nr);
    if (nr > 0)
      {
	for (i=0; i<nr-1; i++)
	  printf("%d ", replacementSequence[i]);
	printf("%d\n", replacementSequence[nr-1]);
      }
    else printf("\n");
    break;

  case 7: case 8: case 9: case 10:
    printf("%d\n",  countReplacement(n, gondolaSequence));
    break;
  }

  return 0;
}
*/

Compilation message (stderr)

gondola.cpp: In function 'int32_t valid(int32_t, int32_t*)':
gondola.cpp:40:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |     for (int i=1;i<a.size();i++){
      |                  ~^~~~~~~~~
gondola.cpp: In function 'int32_t replacement(int32_t, int32_t*, int32_t*)':
gondola.cpp:96:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   96 |     for (int i=0;i<ans.size();i++){
      |                  ~^~~~~~~~~~~
gondola.cpp: In function 'int32_t countReplacement(int32_t, int32_t*)':
gondola.cpp:123:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  123 |     for (int i=1;i<a.size();i++){
      |                  ~^~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 10 / 10
• Subtask 4: 5 / 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