/in/foo.cc: In function 'void solve2()':
/in/foo.cc:22:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j=0;j<e[i].size();j++)bo[i][e[i][j]]=true;
               ~^~~~~~~~~~~~
/in/foo.cc: In function 'void solve3()':
/in/foo.cc:28:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j=0;j<e[i].size();j++)
               ~^~~~~~~~~~~~
/in/foo.cc:29:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int k=j+1;k<e[i].size();k++)
                  ~^~~~~~~~~~~~
/in/foo.cc: In function 'void solve4()':
/in/foo.cc:37:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int k=0;k<e[i].size();k++)
                ~^~~~~~~~~~~~
/in/foo.cc:38:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int l=0;l<e[j].size();l++)
                 ~^~~~~~~~~~~~
/in/foo.cc: In function 'void solve5()':
/in/foo.cc:50:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j=0;j<e[i].size();j++)
               ~^~~~~~~~~~~~
/in/foo.cc:51:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int k=j+1;k<e[i].size();k++)
                  ~^~~~~~~~~~~~
/in/foo.cc:55:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int k=0;k<e[i].size();k++)
                ~^~~~~~~~~~~~
/in/foo.cc:56:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int l=0;l<e[j].size();l++)
                 ~^~~~~~~~~~~~
/in/foo.cc: In function 'void solve6()':
/in/foo.cc:73:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int k=0;k<e[i].size();k++)
                ~^~~~~~~~~~~~
/in/foo.cc:74:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int l=0;l<e[j].size();l++)
                 ~^~~~~~~~~~~~
/in/foo.cc:83:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int k=0;k<e[i].size();k++)
               ~^~~~~~~~~~~~
/in/foo.cc:84:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int l=0;l<e[j].size();l++)
                ~^~~~~~~~~~~~
/in/foo.cc: In function 'void solve7()':
/in/foo.cc:146:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j=0;j<=e[i].size();j++)
               ~^~~~~~~~~~~~~
/in/foo.cc:147:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int k=j+1;k<e[i].size();k++)
                  ~^~~~~~~~~~~~
/in/foo.cc:157:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int k=0;k<e[i].size();k++)
                ~^~~~~~~~~~~~
/in/foo.cc:158:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int l=0;l<e[j].size();l++)
                 ~^~~~~~~~~~~~
/in/foo.cc:162:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int r=0;r<id[u][v].size();r++)
                  ~^~~~~~~~~~~~~~~~
/in/foo.cc:175:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int k=0;k<e[i].size();k++)
               ~^~~~~~~~~~~~
/in/foo.cc:176:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int l=0;l<e[j].size();l++)
                ~^~~~~~~~~~~~