Compilare: main.cpp: In function 'void solve(int)': main.cpp:26:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(cnt > v[lin - 1][col] && v[n - lin + 1][n - col - 1] == v[n - lin + 1][n - col]) { ~~~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:61:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(mx == v[i + 1][j]) { ~~~^~~~~~~~~~~~~~ main.cpp:64:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(mx == v[i + 1][j + 1]) { ~~~^~~~~~~~~~~~~~~~~~