Compilare: main.cpp: In function 'int dfs(int)': main.cpp:12:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<M[k].size();i++) ~^~~~~~~~~~~~ main.cpp:20:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int dfsT(int)': main.cpp:26:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<MT[k].size();i++) ~^~~~~~~~~~~~~ main.cpp:33:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:64:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<afis[i].size();j++) fout<<afis[i][j]<<' '; ~^~~~~~~~~~~~~~~ main.cpp:36:13: warning: unused variable 'k' [-Wunused-variable] int i,j,k; ^