/in/foo.cc: In function 'int main()':
/in/foo.cc:84:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(rint i=1;i<=n;i++)
     ^~~
/in/foo.cc:85:17: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
     a[i]=Read();Build(1,1,n);
                 ^~~~~