Compilare: main.cpp: In function 'void solve()': main.cpp:68:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(val > mods[y + 1][x]) ~~~~^~~~~~~~~~~~~~~~ main.cpp:64:20: warning: unused variable 'y' [-Wunused-variable] int x = 1, y = 1, val = i; ^ main.cpp: In function 'void Read(int&)': main.cpp:26:42: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(f, MAX, 1, IN), pos = 0; ^ main.cpp:31:42: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(f, MAX, 1, IN), pos = 0; ^