Submission #515693

#	Time	Username	Problem	Language	Result	Execution time	Memory
515693		Hacv16	Patkice (COCI20_patkice)	C++17	0 / 50	1083 ms	332 KiB

patkice

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

typedef long long ll;
typedef pair<int, int> pii;

const int MAX = 115;
const int INF = 0x3f3f3f3f;
const int MOD = 1e9 + 7;
const int VAR[4] = {-1, 1, 0, 0};

#define pb push_back
#define sz(x) (int) x.size()
#define fr first
#define sc second
#define mp make_pair
#define all(x) x.begin(), x.end()

int n, m, dx, dy, ix, iy;
bool seen[MAX][MAX];
char s[MAX][MAX];

void setIO(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); 

    #ifndef ONLINE_JUDGE
        freopen("input.txt", "r", stdin); 
        freopen("output.txt", "w", stdout);
    #endif
}

char conv(int x, int y, int nx, int ny){
    if(nx == x + 1 && ny == y) return 'S';
    if(nx == x - 1 && ny == y) return 'N';
    if(nx == x && ny == y + 1) return 'E';
    return 'W';
}

pii pos(char c, int x, int y){
    if(c == '^') return {x - 1, y};
    if(c == 'v') return {x + 1, y};
    if(c == '>') return {x, y + 1};
    return {x, y - 1};
}

void dfs(int x, int y){
    seen[x][y]= true;
    pii nw = pos(s[x][y], x, y);

    if(s[nw.fr][nw.sc] != '.' && s[x][y] != 'x'){
        dfs(nw.fr, nw.sc);
    }
}

int main(){
    setIO();

    memset(s, '.', sizeof(s));

    cin >> n >> m;

    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= m; j++){
            cin >> s[i][j];

            if(s[i][j] == 'o') dx = i, dy = j;
            else if(s[i][j] == 'x') ix = i, iy = j;
        }
    }

    for(int i = 0, j = 3; i < 4; i++, j--){
        int nx = dx + VAR[i], ny = dy + VAR[j];

        if(s[nx][ny] == '.') continue;

        dfs(nx, ny);

        if(seen[ix][iy]){
            cout << ":)" << '\n' << conv(dx, dy, nx, ny) << '\n';
            return 0;
        }
    } 

    cout << ":(" << '\n';

    return 0;
}

Compilation message (stderr)

patkice.cpp: In function 'void setIO()':
patkice.cpp:28:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |         freopen("input.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
patkice.cpp:29:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |         freopen("output.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 30
• Subtask 2: 0 / 20