/in/foo.cc: In function 'int main()':
/in/foo.cc:12:16: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
     int t=(1<<n+1)-1;
               ~^~
/in/foo.cc:44:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0; i<point2.size(); i++) {
                  ~^~~~~~~~~~~~~~
/in/foo.cc:45:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=i+1; j<point2.size(); j++) {
                        ~^~~~~~~~~~~~~~
/in/foo.cc:66:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=1; i<point2.size(); i++) {
                  ~^~~~~~~~~~~~~~
/in/foo.cc:72:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=1; i<point2.size(); i++) {
                  ~^~~~~~~~~~~~~~
/in/foo.cc:73:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=0; j<a[x].size(); j++) {
                      ~^~~~~~~~~~~~
/in/foo.cc:79:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=0; j<point2.size(); j++) {
                      ~^~~~~~~~~~~~~~
/in/foo.cc:42:9: warning: unused variable 's' [-Wunused-variable]
     int s=0;
         ^