Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:16:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(auto it: v[node]) ^~~ main.cpp:59:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' itnow = upper_bound(lo[node].begin(), lo[node].end(), val[node]) - lo[node].begin() - 1; ^~~~~ main.cpp:61:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(itnow == lo[node].size() - 1) ~~~~~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:68:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(itnow == hi[node].size() - 1) ~~~~~~^~~~~~~~~~~~~~~~~~~~~~