foo.cc: In function ‘int main()’:
foo.cc:2:19: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation]
    2 | #define fp(i,a,b) for(register int i=a,I=b+1;i<I;++i)
      |                   ^~~
foo.cc:54:5: note: in expansion of macro ‘fp’
   54 |     fp(i,1,n)ins(i);gf();
      |     ^~
foo.cc:54:21: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘for’
   54 |     fp(i,1,n)ins(i);gf();
      |                     ^~
foo.cc:2:19: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation]
    2 | #define fp(i,a,b) for(register int i=a,I=b+1;i<I;++i)
      |                   ^~~
foo.cc:56:9: note: in expansion of macro ‘fp’
   56 |         fp(i,1,n)G[i][n+1]=-p[m],G[n+1][i]=1;G[n+1][n+2]=1;
      |         ^~
foo.cc:56:46: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘for’
   56 |         fp(i,1,n)G[i][n+1]=-p[m],G[n+1][i]=1;G[n+1][n+2]=1;
      |                                              ^