Compilare: main.cpp: In function 'bool dfs(int)': main.cpp:33:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for (auto v: vx[n]) ^~~ main.cpp:40:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' return false; ^~~~~~ main.cpp: In function 'int main()': main.cpp:48:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("felinare.in", "r", stdin); ^ main.cpp:49:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("felinare.out", "w", stdout); ^