Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:54:7: warning: unused variable 'lunx' [-Wunused-variable] int lunx = el.second; ^~~~ main.cpp: In function 'void onScreen()': main.cpp:11:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("defrisare.in", "r", stdin); ^ main.cpp:12:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("defrisare.out", "w", stdout); ^