Submission #440433

#	Time	Username	Problem	Language	Result	Execution time	Memory
440433		Abrar_Al_Samit	Emacs (COCI20_emacs)	C++17	50 / 50	4 ms	332 KiB

emacs

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;


#define debug(x) cerr << '[' << (#x) << "] = " << x << '\n';

template<class T> using ordered_set = tree<T, null_type , less<T> , rb_tree_tag , tree_order_statistics_node_update> ;

void PlayGround() {
    int n, m; cin >> n >> m;
    vector<string>g(n);
    for(string& row : g) cin >> row;
    int ans = 0;

    auto BFS = [&] (int i, int j) {
        queue<pair<int,int>>q;
        q.push({i, j});

        auto valid = [=] (int x, int y) {
            return x>-1 && y>-1 && x<n && y<m && g[x][y]=='*';
        };
        while(!q.empty()) {
            pair<int,int>cur = q.front(); q.pop();
            if(g[cur.first][cur.second]!='*') continue;
            g[cur.first][cur.second] = '.';
            int dx[] {1, -1, 0, 0};
            int dy[] {0, 0, 1, -1};
            for(int k=0; k<4; ++k) {
                int new_i = cur.first + dx[k], new_j = cur.second + dy[k];
                if(valid(new_i, new_j)) 
                    q.push({new_i, new_j});
            }
        }
    };


    for(int i=0; i<n; ++i) {
        for(int j=0; j<m; ++j) {
            if(g[i][j]=='*') {
                BFS(i, j), ++ans;
            }
        }
    }
    cout << ans << '\n';

    #ifndef ONLINE_JUDGE
        cerr << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
    #endif
} 
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    // #ifndef ONLINE_JUDGE
    //     freopen("input.txt", "r", stdin);
    // #endif
    PlayGround();

    return 0;
}

• Subtask 1: 50 / 50