/in/foo.cc:3:30: warning: '-fwhole-program' is not an option that controls warnings [-Wpragmas]
 #pragma GCC diagnostic error "-fwhole-program"
                              ^~~~~~~~~~~~~~~~~
/in/foo.cc:4:30: warning: '-fcse-skip-blocks' is not an option that controls warnings [-Wpragmas]
 #pragma GCC diagnostic error "-fcse-skip-blocks"
                              ^~~~~~~~~~~~~~~~~~~
/in/foo.cc:5:30: warning: '-funsafe-loop-optimizations' is not an option that controls warnings [-Wpragmas]
 #pragma GCC diagnostic error "-funsafe-loop-optimizations"
                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc: In function 'void io::gi(I&)':
/in/foo.cc:36:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   for (x = 0; c <= '9' && c >= '0'; c = gc()) x = x * 10 + (c & 15); x *= f;
   ^~~
/in/foo.cc:36:70: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   for (x = 0; c <= '9' && c >= '0'; c = gc()) x = x * 10 + (c & 15); x *= f;
                                                                      ^
/in/foo.cc: In function 'void io::print(I)':
/in/foo.cc:41:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   if (!x) putc ('0'); if (x < 0) putc ('-'), x = -x;
   ^~
/in/foo.cc:41:23: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
   if (!x) putc ('0'); if (x < 0) putc ('-'), x = -x;
                       ^~
/in/foo.cc: In function 'int main()':
/in/foo.cc:210:33: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
     printf("%d\n",(Pnum+mod)%mod);
                                 ^
/in/foo.cc:191:10: warning: unused variable 'k' [-Wunused-variable]
  int i,j,k,o,p,l;
          ^
/in/foo.cc:191:12: warning: unused variable 'o' [-Wunused-variable]
  int i,j,k,o,p,l;
            ^
/in/foo.cc:191:14: warning: unused variable 'p' [-Wunused-variable]
  int i,j,k,o,p,l;
              ^
/in/foo.cc:191:16: warning: unused variable 'l' [-Wunused-variable]
  int i,j,k,o,p,l;
                ^