Compilare: main.cpp: In function 'int main()': main.cpp:132:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (myList.size() > max_surrounded) { ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~ main.cpp:74:58: warning: unused variable 'first' [-Wunused-variable] int N, M, max_surrounded = 0, store_i = 0, store_j = 0, first = 0; ^~~~~ main.cpp:76:6: warning: unused variable 'noPiecesSurrounded' [-Wunused-variable] int noPiecesSurrounded = 0; ^~~~~~~~~~~~~~~~~~