Submission #447707

#	Time	Username	Problem	Language	Result	Execution time	Memory
447707		PiejanVDC	Patkice (COCI20_patkice)	C++17	50 / 50	1 ms	332 KiB

patkice

#include <bits/stdc++.h>
using namespace std;

int n,m;
vector<string>v;
int mp[101][101];

bool check(int x, int y) {
    if(x < 0 || x >= n || y < 0 || y >= m) return false;
    return true;
}

int dfs(int i, int j) {
    if(!check(i,j)) return -1;
    if(v[i][j] == 'x') return 0;
    if(v[i][j] == '.' || v[i][j] == 'o') return -1;
    if(mp[i][j]) return mp[i][j];

    if(v[i][j] == 'v') {
        int ans = dfs(i+1,j);
        if(ans != -1) {
            return mp[i][j] = 1 + ans;
        } else return mp[i][j] =-1;
    }
    else if(v[i][j] == '^') {
        int ans = dfs(i-1,j);
        if(ans != -1) {
            return mp[i][j] = 1 + ans;
        } else return mp[i][j] =-1;
    }
    else if(v[i][j] == '>') {
        int ans = dfs(i,j+1);
        if(ans != -1) {
            return mp[i][j] = 1 + ans;
        } else return mp[i][j] =-1;
    }
    else {
        int ans = dfs(i,j-1);
        if(ans != -1) {
            return mp[i][j] = 1 + ans;
        } else return mp[i][j] =-1;
    }
}

signed main() {
    cin>>n>>m;
    v.resize(n);
    for(auto &z : v) cin>>z;

    pair<int,int>s;
    for(int i = 0 ; i < n ; i++) {
        for(int j = 0 ; j < m ; j++) {
            if(v[i][j] == 'o') s.first=i,s.second=j;
        }
    }
    char win;
    int64_t best = INT_MAX, ans;

    ans=dfs(s.first,s.second+1);
    if(ans != -1 && ans < best) {
        win = 'E',best=ans;
    }

    ans=dfs(s.first-1,s.second);
    if(ans != -1 && ans < best) {
        win = 'N',best=ans;
    }

    ans=dfs(s.first+1,s.second);
    if(ans!=-1&&ans < best) {
        win = 'S',best=ans;
    }

    ans=dfs(s.first,s.second-1);
    if(ans != -1 && ans < best) {
        win = 'W',best=ans;
    }

    if(best < INT_MAX) cout << ":)\n" << win;
    else cout << ":(";
}

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