Compilare: main.cpp: In function 'int main()': main.cpp:46:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("joc.in", "r", stdin); ^ main.cpp:47:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("joc.out", "w", stdout); ^ main.cpp: In function 'void solve()': main.cpp:41:44: warning: 'optj' may be used uninitialized in this function [-Wmaybe-uninitialized] cout << opt << ' ' << opti << ' ' << optj; ^ main.cpp:41:33: warning: 'opti' may be used uninitialized in this function [-Wmaybe-uninitialized] cout << opt << ' ' << opti << ' ' << optj; ^~~