/in/foo.cc: In function 'int main()':
/in/foo.cc:27:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<c.size();i++){
               ~^~~~~~~~~
/in/foo.cc:54:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<a.size();i++){
                 ~^~~~~~~~~
/in/foo.cc:57:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<b.size();i++){
                 ~^~~~~~~~~
/in/foo.cc:63:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int i=0;i<a.size();i++){
                  ~^~~~~~~~~
/in/foo.cc:69:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int i=0;i<b.size();i++){
                  ~^~~~~~~~~
/in/foo.cc:76:24: warning: comparison of constant '100' with boolean expression is always true [-Wbool-compare]
     else if(!an&&bn&&bn<=100) {temp=-1; temp1[level]=-1;}
                      ~~^~~~~
/in/foo.cc:45:8: warning: unused variable 'ans' [-Wunused-variable]
    int ans=0;
        ^~~