Submission #90180

#	Time	Username	Problem	Language	Result	Execution time	Memory
90180		nikolapesic2802	Cop and Robber (BOI14_coprobber)	C++14	0 / 100	66 ms	63324 KiB

coprobber

#include <bits/stdc++.h>
#include "coprobber.h"
using namespace std;
#define pb push_back

int lim=MAX_N*MAX_N*2;
vector<vector<int> > graf(2*lim);
vector<vector<int> > graph(MAX_N);
int convert(int i,int j,int k)
{
    int br=i+j*MAX_N+k*lim;
    return br;
}
vector<int> winlose(2*lim);
vector<int> visited(2*lim);
int dfs(int tr)
{
    visited[tr]=1;
    if(winlose[tr]==1)
        return 1;
    int way=-1;
    if(tr>=lim)
    {
        for(auto p:graf[tr])
        {
            if(visited[p])
                return -1;
            int val=dfs(p);
            if(val==-1)
                return -1;
        }
        return 1;
    }
    else
    {
        for(auto p:graf[tr])
        {
            if(visited[p])
                continue;
            int val=dfs(p);
            if(val!=-1)
                return p;
        }
        return -1;
    }
}
int pozicija=0;
int start(int N, bool A[MAX_N][MAX_N])
{
    for(int i=0;i<N;i++)
        for(int j=0;j<N;j++)
            if(A[i][j])
                graph[i].pb(j);
    for(int i=0;i<N;i++)
    {
        for(int j=0;j<N;j++)
        {
            if(i==j)
            {
                winlose[convert(i,j,0)]=1;
                winlose[convert(i,j,1)]=1;
                continue;
            }
            graf[convert(i,j,0)].pb(convert(i,j,1));
            for(auto p:graph[i])
            {
                graf[convert(i,j,0)].pb(convert(p,j,1));
            }
            for(auto p:graph[j])
            {
                graf[convert(i,j,1)].pb(convert(i,p,0));
            }
        }
    }
    for(int i=0;i<N;i++)
    {
        fill(visited.begin(),visited.end(),0);
        dfs(convert(0,i,0));
        if(winlose[convert(0,i,0)]==1)
            return 0;
    }
    return -1;
}
int convert_back(int tr)
{
    tr%=lim;
    tr%=MAX_N;
  	assert(tr>=0&&tr<=MAX_N);
    return tr;
}
int nextMove(int R)
{
    fill(visited.begin(),visited.end(),0);
    return pozicija=convert_back(dfs(convert(pozicija,R,0)));
}

Compilation message (stderr)

coprobber.cpp: In function 'int dfs(int)':
coprobber.cpp:21:9: warning: unused variable 'way' [-Wunused-variable]
     int way=-1;
         ^~~

• Subtask 1: 0 / 16
• Subtask 2: 0 / 14
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40