Olinfo/lake.cpp at main · Nataso08/Olinfo · GitHub

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// NOTE: it is recommended to use this even if you don't understand the following code.

#include <fstream>
#include <iostream>
#include <string>
#include <vector>

using namespace std;

int main() {
    // uncomment the two following lines if you want to read/write from files
    // ifstream cin("input.txt");
    // ofstream cout("output.txt");

    int N, M;
    cin >> N >> M;

    vector<string> city(N);
    for (int i = 0; i < N; ++i)
        cin >> city[i];

    int P = 0;


    // INSERT YOUR CODE HERE
    for (int i=0; i<N; i++) {
        for (int j=0; j<M; j++) {
            if (city[i][j] == '#') {
                if (i != 0) {
                    if (city[i-1][j] == '.') P++;
                }
                if (i != N-1) {
                    if (city[i+1][j] == '.') P++;
                }
                if (j != 0) {
                    if (city[i][j-1] == '.') P++;
                }
                if (j != M-1) {
                    if (city[i][j+1] == '.') P++;
                }
            }
        }
    }

    cout << P << endl;

    return 0;
}