Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:18:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<nod[x].size(); i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void init()': main.cpp:33:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<euler.size(); i++) rmq[i][0] = i; ~^~~~~~~~~~~~~ main.cpp:34:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; (1<<i)<=euler.size(); i++) ~~~~~~^~~~~~~~~~~~~~ main.cpp:35:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<=euler.size()-(1<<i); j++) ~^~~~~~~~~~~~~~~~~~~~~ main.cpp:30:21: warning: iteration 500008 invokes undefined behavior [-Waggressive-loop-optimizations] { log2[i] = log2[i-1]; ~~~~~~~~^~~~~~~~~~~ main.cpp:29:19: note: within this loop for(int i=2; i<=5*NMAX+10; i++) ~^~~~~~~~~~~