Compilare: user.cpp: In function ‘void calc_dist(int)’: user.cpp:16:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<g[dad].size(); i++) ^ user.cpp: In function ‘void dfs(int)’: user.cpp:31:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<g[dad].size(); i++) ^ user.cpp: In function ‘void calc_late(int)’: user.cpp:49:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<gt[dad].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:65:18: warning: unused variable ‘minn’ [-Wunused-variable] int i, x, y, minn=oo, j; ^ user.cpp:65:27: warning: unused variable ‘j’ [-Wunused-variable] int i, x, y, minn=oo, j; ^