Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:19:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i<v[r].size(); i++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:38:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for (i = 1; t[i]; i++); ^~~ main.cpp:39:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' dfs(i, 0); ^~~