Submission #953577

#	Time	Username	Problem	Language	Result	Execution time	Memory
953577		irmuun	Gondola (IOI14_gondola)	C++17	75 / 100	32 ms	4804 KiB

gondola

#include<bits/stdc++.h>
#include "gondola.h"

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

int valid(int n, int in[]){
    int mn=n+1,pos=-1;
    map<int,bool>used;
    for(int i=0;i<n;i++){
        if(used[in[i]]){
            return 0;
        }
        used[in[i]]=true;
        if(in[i]<=n){
            if(in[i]<mn){
                mn=in[i];
                pos=i;
            }
        }
    }
    if(pos==-1) return 0;
    for(int i=0;i<n;i++){
        int p=(pos+i)%n;
        if(in[p]<=n){
            if(in[p]!=mn+i) return 0;
        }
    }
    return 1;
}
int replacement(int n, int gon[], int rep[]){
    int mx=0;
    vector<pair<int,int>>v;
    int a[n];
    iota(a,a+n,1);
    int mn=n+1,pos=-1;
    for(int i=0;i<n;i++){
        if(gon[i]<=n){
            if(gon[i]<mn){
                mn=gon[i];
                pos=i;
            }
        }
    }
    if(pos>-1){
        for(int i=0;i<n;i++){
            a[(i+pos)%n]=mn;
            mn=mn+1;
            if(mn>n) mn=1;
        }
    }
    for(int i=0;i<n;i++){
        if(gon[i]>n){
            v.pb({gon[i],i});
        }
    }
    sort(all(v));
    for(int i=0;i<v.size();i++){
    }
    int l=n+1,cur=0;
    for(int i=0;i<v.size();i++){
        int bef=a[v[i].ss];
        for(;l<=v[i].ff;l++){
            rep[cur++]=bef;
            bef=l;
        }
    }
    return cur;
}
const int mod=1e9+9;
int binpow(int a,int b){
    int res=1;
    while(b){
        if(b&1){
            res=1ll*res*a%mod;
        }
        a=1ll*a*a%mod;
        b=b>>1;
    }
    return res;
}
int countReplacement(int n, int in[]){
    int ans=valid(n,in);
    if(ans==0) return 0;
    bool flag=false;
    for(int i=0;i<n;i++){
        if(in[i]<=n){
            flag=true;
        }
    }
    if(!flag){
        ans=n;
    }
    vector<int>v;
    for(int i=0;i<n;i++){
        if(in[i]>n){
            v.pb(in[i]);
        }
    }
    int left=v.size(),last=n;
    sort(all(v));
    for(int i=0;i<v.size();i++){
        ans=1ll*ans*binpow(left,v[i]-last-1)%mod;
        last=v[i];
        left--;
    }
    return ans;
}

Compilation message (stderr)

gondola.cpp: In function 'int replacement(int, int*, int*)':
gondola.cpp:64:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |     for(int i=0;i<v.size();i++){
      |                 ~^~~~~~~~~
gondola.cpp:67:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |     for(int i=0;i<v.size();i++){
      |                 ~^~~~~~~~~
gondola.cpp:38:9: warning: unused variable 'mx' [-Wunused-variable]
   38 |     int mx=0;
      |         ^~
gondola.cpp: In function 'int countReplacement(int, int*)':
gondola.cpp:108:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  108 |     for(int i=0;i<v.size();i++){
      |                 ~^~~~~~~~~

• 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