/in/foo.cc: In function 'void un(int, int)':
/in/foo.cc:81:10: warning: unused variable 'a' [-Wunused-variable]
  int p,q,a,b;
          ^
/in/foo.cc:81:12: warning: unused variable 'b' [-Wunused-variable]
  int p,q,a,b;
            ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:134:10: warning: unused variable 'c' [-Wunused-variable]
  int x,y,c,d;
          ^
/in/foo.cc:134:12: warning: unused variable 'd' [-Wunused-variable]
  int x,y,c,d;
            ^

VJ4Error('ProblemDataNotFoundError', '题目 590c9949d3d8a13210993ad1 的数据未找到。', 'newbzoj', '590c9949d3d8a13210993ad1')