/in/foo.cc: In function 'int main()':
/in/foo.cc:8:10: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for(int a;a<=n;a++){
          ^
/in/foo.cc:11:10: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for(int b;b<=m;b++){
          ^
/in/foo.cc:14:10: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized]
  for(int c;c<=m;c++){
          ^
/in/foo.cc:6:27: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized]
  int k[n+1],l[m+1],q[m+1],p,g=1;
                           ^