/in/foo.cc: In function 'int main()':
/in/foo.cc:34:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int p = 0;p<v2[i].size();p++){
~^~~~~~~~~~~~~
/in/foo.cc:38:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if(ii>=v.size()||zz>=v2[i].size()) continue;
~~^~~~~~~~~~
/in/foo.cc:38:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if(ii>=v.size()||zz>=v2[i].size()) continue;
~~^~~~~~~~~~~~~~
/in/foo.cc:35:17: warning: unused variable 'st' [-Wunused-variable]
int st = v2[i][p].index;
^~