/in/foo.cc: In function 'void build(int, int, int)':
/in/foo.cc:81:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(dep_vex[dep[mp[l]]].size() > limit)
      ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:121:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if (dep_vex[u].size() > limit) {
        ~~~~~~~~~~~~~~~~~~^~~~~~~