/in/foo.cc: In function 'int main()':
/in/foo.cc:148:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   for(int i = 0;i < (int)G1.size();++i) printf("%d ",G1[i]);printf("\n");
   ^~~
/in/foo.cc:148:61: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   for(int i = 0;i < (int)G1.size();++i) printf("%d ",G1[i]);printf("\n");
                                                             ^~~~~~
/in/foo.cc:150:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   for(int i = 0;i < (int)G2.size();++i) printf("%d ",G2[i]);printf("\n");
   ^~~
/in/foo.cc:150:61: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   for(int i = 0;i < (int)G2.size();++i) printf("%d ",G2[i]);printf("\n");
                                                             ^~~~~~
/in/foo.cc:132:19: warning: variable 'ans' set but not used [-Wunused-but-set-variable]
   int l = 1,r = n,ans = 1;
                   ^~~