/in/foo.cc: In function 'int main()':
/in/foo.cc:2:19: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
 #define fp(i,a,b) for(register int i=a,I=b+1;i<I;++i)
                   ^
/in/foo.cc:45:5: note: in expansion of macro 'fp'
     fp(i,1,n)G[i][n+1]=-p[m],G[n+1][i]=1;G[n+1][n+2]=1;
     ^~
/in/foo.cc:45:42: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
     fp(i,1,n)G[i][n+1]=-p[m],G[n+1][i]=1;G[n+1][n+2]=1;
                                          ^