运行 ID: 127079

Main.cc:75:10: warning: multi-character character constant [-Wmultichar]
   printf('%d\n',(X==x&&Y==y)?count:-1);
          ^~~~~~
Main.cc: In function ‘int main()’:
Main.cc:51:6: warning: operation on ‘m’ may be undefined [-Wsequence-point]
     m=(++m)%4;
     ~^~~~~~~~
Main.cc:75:38: error: invalid conversion from ‘int’ to ‘const char*’ [-fpermissive]
   printf('%d\n',(X==x&&Y==y)?count:-1);
                                      ^
In file included from /usr/include/stdio.h:862:0,
                 from /usr/include/c++/7/cstdio:42,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:46,
                 from Main.cc:1:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:102:1: note:   initializing argument 1 of ‘int printf(const char*, ...)’
 printf (const char *__restrict __fmt, ...)
 ^~~~~~