Compilare: main.cpp: In function 'void error()': main.cpp:12:9: warning: unused variable 'a' [-Wunused-variable] 12 | int a = 3; | ^ main.cpp: In function 'void dfs(int)': main.cpp:34:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<muchie>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for(int i=0; i < v[nr].size(); i++) | ~~^~~~~~~~~~~~~~