Compilare: main.cpp: In function 'void DF(int, int)': main.cpp:17:9: warning: unused variable 'vec' [-Wunused-variable] int vec, sz = v[nod].size(), i; ^~~ main.cpp: In function 'int main()': main.cpp:59:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i <= e.size(); ++i) //RMQ init ~~^~~~~~~~~~~ main.cpp:61:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1; (1<<j) <= e.size(); ++j) ~~~~~~~^~~~~~~~~~~ main.cpp:62:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i <= e.size() - (1<<j) + 1; ++i) ~~^~~~~~~~~~~~~~~~~~~~~~~~