Submission #959146

#	Time	Username	Problem	Language	Result	Execution time	Memory
959146		berr	Cop and Robber (BOI14_coprobber)	C++17	0 / 100	1 ms	2392 KiB

coprobber

#include <cstdio>
#include <utility>
#include <bits/stdc++.h>

#include "coprobber.h"

using namespace std;

int pos;
map<array<int, 2>, int> mp;
int state[500][500][2];
vector<vector<int>> g(500);

int calc(int x, int y, int player){
    if(x==y&&player==0) return state[x][y][player]=x;
    else if(x==y)return state[x][y][player]=-1;
    if(state[x][y][player]!=-2)return state[x][y][player];
  

    if(player==0){
        int c=0;
        state[x][y][player]=-1; //-1 means holding 

        for(auto i: g[x]){
            if(calc(i, y, 1)==-1){
                state[x][y][0]=i;
                c++;
            }
        }

        if(calc(x, y, 1)==-1){
            state[x][y][0]=x;
            c++;
        }

        if(!c) state[x][y][player]=-1;

    }
    else{
        int c=0;    
        state[x][y][player]=-1;

        for(auto i: g[y]){
            if(calc(x, i, 0)==-1){
                state[x][y][1]=i;
                c++;
            }
        }

        if(!c){
            for(auto l: g[y])
                state[x][l][0]=x;
        }

    }

    return state[x][y][player];
};

int start(int n, bool a[MAX_N][MAX_N]) {


    for(int i=0; i<n; i++){
        for(int l=0; l<n; l++){
            state[i][l][0]=-2; 
            state[i][l][1]=-2;
            if(a[i][l]){
                g[i].push_back(l);
            }
        }
    }

    for(int i=0; i<n; i++){
        int flag=1;
        for(int l=0; l<n; l++){
            if(calc(i, l, 1)!=-1){
                flag=0;
            }
        }
        if(flag) return pos=i;
    }

    return -1;
}

int nextMove(int R) {
    return pos = calc(pos, R, 0);
} 

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