Compilare: main.cpp: In function 'int dfs(int, int)': main.cpp:44:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < graf[node].size(); i++) ~~^~~~~~~~~~~~~~~~~~~ main.cpp:52:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'void gen_sparse_table()': main.cpp:56:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= euler.size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:62:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < euler.size() - ((int)pow(2, i) - 1); j++) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int query(int, int)': main.cpp:77:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < euler.size() && (!found1 || !found2); i++) ~~^~~~~~~~~~~~~~ main.cpp:90:5: warning: 'n2i' may be used uninitialized in this function [-Wmaybe-uninitialized] if(n1i > n2i) swap(n1i, n2i); ^~ main.cpp:90:5: warning: 'n1i' may be used uninitialized in this function [-Wmaybe-uninitialized]