Compilare: main.cpp: In function 'int main()': main.cpp:49:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | for(int dircnt = 0; dircnt<dirs.size(); dircnt++) { | ~~~~~~^~~~~~~~~~~~ main.cpp:55:49: warning: suggest parentheses around '&&' within '||' [-Wparentheses] 55 | if (mat[nw[0]][nw[1]] == 0 || nw[2] && mat[nw[0]][nw[1]] <= k1 || nw[3] && mat[nw[0]][nw[1]] >= k2) { main.cpp:55:85: warning: suggest parentheses around '&&' within '||' [-Wparentheses] 55 | if (mat[nw[0]][nw[1]] == 0 || nw[2] && mat[nw[0]][nw[1]] <= k1 || nw[3] && mat[nw[0]][nw[1]] >= k2) {