Compilare: main.cpp: In function 'void umple2(const unsigned char&, const unsigned char&, const int&)': main.cpp:53:27: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'const int' [-Wsign-compare] 53 | if(mat_parc[x][y] == val) | ~~~~~~~~~~~~~~~^~~~~~ main.cpp: In function 'int main()': main.cpp:110:32: warning: logical not is only applied to the left hand side of comparison [-Wlogical-not-parentheses] 110 | if(!x1 > n || y1 > m) | ^ main.cpp:110:28: note: add parentheses around left hand side expression to silence this warning 110 | if(!x1 > n || y1 > m) | ^~~ | ( ) main.cpp:114:37: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare] 114 | if (sum > ans.sz) { | ~~~~^~~~~~~~