Submission #993421

#	Time	Username	Problem	Language	Result	Execution time	Memory
993421		alexander707070	Magic Show (APIO24_show)	C++17	0 / 100	2 ms	1076 KiB

Alice

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

#define MAXN 5007
using namespace std;

int perm[MAXN],to[MAXN],ot[MAXN];
vector< pair<int,int> > edges;

vector< pair<int,int> > Alice(){
    
    long long x = setN(5000);
    int n=5000;

    for(int i=1;i<=n;i++)perm[i]=i;
    for(int i=1;i<=n;i++){
        swap(perm[i],perm[(i*23+76)%n+1]);
    }

    for(int i=2;i<=n;i++){
        to[i]=(i*12+72)%(i-1)+1;

        if(to[i]>1)ot[i]=to[i]-1;
        else ot[i]=2;
    }

    for(long long i=60;i>=0;i--){
        if(((1LL<<i)&x)>0){
            for(int f=2;f<=n;f++){
                if(f%61==i)edges.push_back({perm[to[f]],perm[f]});
            }
        }else{
            for(int f=2;f<=n;f++){
                if(f%61==i)edges.push_back({perm[ot[f]],perm[f]});
            }
        }
    }

    return edges;
}

Bob

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

#define MAXN 5007
using namespace std;

int permm[MAXN],tot[MAXN];
int rev[MAXN];
long long ans;

long long Bob(vector< pair<int,int> > e){
	
    int n=5000;

    for(int i=1;i<=n;i++)permm[i]=i;
    for(int i=1;i<=n;i++){
        swap(permm[i],permm[(i*23+76)%n+1]);
    }

    for(int i=1;i<=n;i++)rev[permm[i]]=i;
    for(int i=2;i<=n;i++)tot[i]=(i*12+72)%(i-1)+1;

    for(int i=0;i<e.size();i++){
        e[i].first=rev[e[i].first];
        e[i].second=rev[e[i].second];

        if(e[i].first>e[i].second)swap(e[i].first,e[i].second);

        if(tot[e[i].second]==e[i].first){
            ans|=(1LL<<(e[i].second%61));
        }
    }
	
    return ans;
}

Compilation message (stderr)

Bob.cpp: In function 'long long int Bob(std::vector<std::pair<int, int> >)':
Bob.cpp:23:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |     for(int i=0;i<e.size();i++){
      |                 ~^~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 30
• Subtask 3: 0 / 65