Submission #867639

#	Time	Username	Problem	Language	Result	Execution time	Memory
867639		cheat_when_I_was_young	Tracks in the Snow (BOI13_tracks)	C++17	0 / 100	962 ms	1048576 KiB

tracks

#include "bits/stdc++.h"
using namespace std;
void solve();
bool multitest();
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    clock_t TIME = clock();
    int TEST = 1;
    if (multitest()) cin >> TEST;
    while (TEST--) solve();
    cerr << "\nUsed: " << clock() - TIME << " ms\n\n";
}

bool multitest() {
    return 0;
}

int n, m;
char a[4005][4005];
bool visited[4005][4005], F, R;

void dfs(int x, int y) {
    if (a[x][y] == 'F') F = 1;
    if (a[x][y] == 'R') R = 1;
    visited[x][y] = 1;

    for (int i = max(x-1, 1); i <= min(x+1, n); ++i)
        for (int j = max(y-1, 1); j <= min(y+1, m); ++j)
            if ((i != x || j != y) && a[i][j] != '.' && !visited[i][j])
                dfs(i, j);
}

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

    int ans = 0;

    for (int i = 1; i <= n; ++i)
        for (int j = 1; j <= m; ++j)
            if (a[i][j] != '.' && !visited[i][j]) {
                F = R = 0;
                dfs(i, j);
                ans += F + R;
            }

    cout << ans;
}

• Subtask 1: 0 / 30
• Subtask 2: 0 / 70