Compilare: main.cpp: In function 'int main()': main.cpp:55:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | for(int dircnt = 0; dircnt<dirs.size(); dircnt++) { | ~~~~~~^~~~~~~~~~~~ main.cpp:68:32: warning: suggest parentheses around '&&' within '||' [-Wparentheses] 68 | nw[2] == 1 && mat[nw[0]][nw[1]] <= k1 || main.cpp:69:32: warning: suggest parentheses around '&&' within '||' [-Wparentheses] 69 | nw[2] == 2 && mat[nw[0]][nw[1]] >= k2) {