Compilare: main.cpp: In function 'int main()': main.cpp:83:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses] cin >> mat[i] + 1; ~~~~~~~^~~ main.cpp:78:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("barbar.in","r",stdin); ^ main.cpp:79:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("barbar.out","w",stdout); ^ main.cpp: In function 'int OK(int)': main.cpp:56:20: warning: 'sy' may be used uninitialized in this function [-Wmaybe-uninitialized] if (mat2[sx][sy] || mat2[fx][fy]) return 0; ~~~~~~~~~~~^ main.cpp:56:20: warning: 'sx' may be used uninitialized in this function [-Wmaybe-uninitialized] main.cpp:56:36: warning: 'fx' may be used uninitialized in this function [-Wmaybe-uninitialized] if (mat2[sx][sy] || mat2[fx][fy]) return 0; ~~~~~~~~~~~^ main.cpp:56:36: warning: 'fy' may be used uninitialized in this function [-Wmaybe-uninitialized]