/in/foo.cc: In function 'int main()':
/in/foo.cc:69:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<V.size();i++) mp2[V[i]%Mod].clear();
                 ~^~~~~~~~~
/in/foo.cc:77:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(unsigned int j=1;j<=M;j++) SumB[j]=SumB[j-1]*27+(B[j]-'a'+1);
                          ~^~~