Submission #583625

#	Time	Username	Problem	Language	Result	Execution time	Memory
583625		AGE	Političari (COCI20_politicari)	C++14	40 / 70	72 ms	8372 KiB

politicari

#include<bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define int long long
using namespace std;
const int N=1e6,M=2e3,mod=1e9+7;
int a[1000][1000];
map<pair<int,int>,int>viss;
vector<pair<int,int>>v;
pair<int,int>anss;
main()
{
    v.clear();
    anss={0,0};
    viss.clear();

    int n,m;
    cin>>n>>m;

    for(int i=0;i<n;i++)
        for(int j=0;j<n;j++)
            cin>>a[i][j];

    v.pb({0,1});
    v.pb({1,2});

    viss[{0,1}]=1;
    viss[{1,2}]=1;

    while(1){

        int x=v.size()-1;

        if(viss[{v[x].S,a[v[x].S-1][v[x].F-1]}]==1){
            anss.F=v[x].S;
            anss.S=a[v[x].S-1][v[x].F-1];
            break;
        }


        viss[{v[x].S,a[v[x].S-1][v[x].F-1]}]=1;
        v.pb({v[x].S,a[v[x].S-1][v[x].F-1]});

    }

    assert(v.size()>20);
    reverse(v.begin(),v.end());
    while((v.size())&&((*v.rbegin()).F!=anss.F||(*v.rbegin()).S!=anss.S)&&m>0)
        v.pop_back(),m--;


    int ok=0;
    
    for(int i=0;i<v.size();i++)
        if(v[i].S==51)
            ok=1;
            
    assert(ok!=1);
    reverse(v.begin(),v.end());

    int xx=m%v.size();

    if(xx==0)
        xx=v.size();

    xx--;

   // assert(v[xx].S>12);
    cout<<v[xx].S<<endl;

    return 0;
}

Compilation message (stderr)

politicari.cpp:12:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   12 | main()
      | ^~~~
politicari.cpp: In function 'int main()':
politicari.cpp:55:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |     for(int i=0;i<v.size();i++)
      |                 ~^~~~~~~~~

• Subtask 1: 40 / 70