Submission #448125

#	Time	Username	Problem	Language	Result	Execution time	Memory
448125		jk410	Patkice (COCI20_patkice)	C++17	50 / 50	1 ms	332 KiB

patkice

#include <bits/stdc++.h>
using namespace std;
const int INF=1e9;
int N,M,sx,sy;
int dx[4]={0,-1,1,0},dy[4]={1,0,0,-1},Time[4];
bool Visited[100][100];
string A[100];
int dfs(int x,int y){
    if (x<0||x>=N||y<0||y>=M||Visited[x][y]||A[x][y]=='.')
        return INF;
    if (A[x][y]=='x')
        return 0;
    Visited[x][y]=true;
    for (int i=0; i<4; i++){
        if (A[x][y]==">^v<"[i]){
            int tmp=dfs(x+dx[i],y+dy[i]);
            if (tmp==INF)
                return INF;
            return tmp+1;
        }
    }
}
int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>N>>M;
    for (int i=0; i<N; i++){
        cin>>A[i];
        for (int j=0; j<M; j++){
            if (A[i][j]=='o'){
                sx=i;
                sy=j;
            }
        }
    }
    for (int i=0; i<4; i++){
        memset(Visited,false,sizeof(Visited));
        A[sx][sy]=">^v<"[i];
        Time[i]=dfs(sx,sy);
    }
    int Min=INF,idx;
    for (int i=0; i<4; i++){
        if (Time[i]<Min){
            Min=Time[i];
            idx=i;
        }
    }
    if (Min==INF)
        cout<<":(";
    else
        cout<<":)\n"<<"ENSW"[idx];
    return 0;
}

Compilation message (stderr)

patkice.cpp: In function 'int dfs(int, int)':
patkice.cpp:22:1: warning: control reaches end of non-void function [-Wreturn-type]
   22 | }
      | ^

• Subtask 1: 30 / 30
• Subtask 2: 20 / 20