/in/foo.cc: In function 'int main()':
/in/foo.cc:16:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int m=0;m<T;m++){
                 ~^~
/in/foo.cc:22:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for(int j=1;j<=n;j++){
                   ~^~~
/in/foo.cc:29:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for(int i=1;i<=n;i++){
                   ~^~~
/in/foo.cc:42:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=i+1;j<=n;j++){
                       ~^~~
/in/foo.cc:64:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i=1;i<=b[t][0];i++){
                     ~^~~~~~~~~