Compilare: main.cpp: In function 'void dfs(int)': main.cpp:17:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | for(int i = 0; i < a[x].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp: In function 'void dfst(int)': main.cpp:26:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for(int i = 0; i < t[x].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:40:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] 40 | for(int i = 1; i <= n; i++) | ^~~ main.cpp:43:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for' 43 | vis.reset(); | ^~~ main.cpp:50:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for(int j = 0; j < cn[i].size(); j++) | ~~^~~~~~~~~~~~~~ main.cpp:32:20: warning: unused variable 's' [-Wunused-variable] 32 | ll n, m, x, y, s; | ^