Compilare: main.cpp: In function 'void dfs(int)': main.cpp:15:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for(int i=0;i<Mad1[nodS].size();++i) | ~^~~~~~~~~~~~~~~~~~ main.cpp:19:14: warning: pointer to a function used in arithmetic [-Wpointer-arith] 19 | dfs[j]; | ^ main.cpp:19:14: warning: value computed is not used [-Wunused-value] 19 | dfs[j]; | ~~~~~^ main.cpp:19:14: warning: statement has no effect [-Wunused-value] main.cpp: In function 'void dfst(int)': main.cpp:27:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(int i=0;i<Mad2[nodS].size();++i) | ~^~~~~~~~~~~~~~~~~~ main.cpp:31:19: warning: pointer to a function used in arithmetic [-Wpointer-arith] 31 | dfst[i]; | ^ main.cpp:31:19: warning: value computed is not used [-Wunused-value] 31 | dfst[i]; | ~~~~~~^ main.cpp:31:19: warning: statement has no effect [-Wunused-value] main.cpp: In function 'int main()': main.cpp:47:18: warning: pointer to a function used in arithmetic [-Wpointer-arith] 47 | dfs[i]; | ^ main.cpp:47:18: warning: value computed is not used [-Wunused-value] 47 | dfs[i]; | ~~~~~^ main.cpp:47:18: warning: statement has no effect [-Wunused-value] main.cpp:55:19: warning: pointer to a function used in arithmetic [-Wpointer-arith] 55 | dfst[p]; | ^ main.cpp:55:19: warning: value computed is not used [-Wunused-value] 55 | dfst[p]; | ~~~~~~^ main.cpp:55:19: warning: statement has no effect [-Wunused-value] main.cpp:62:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for(int j=0;j<cc[i].size();++j) | ~^~~~~~~~~~~~~