/in/foo.cc: In function 'int dp1(int)':
/in/foo.cc:21:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int k=0;k<g[i].size();k++){
              ~^~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:40:8: error: 'dp2' was not declared in this scope
   dp2(i);
        ^