/in/foo.cc: In function 'int main()':
/in/foo.cc:39:11: warning: 't' may be used uninitialized [-Wmaybe-uninitialized]
   39 |     while(t)
      |           ^
/in/foo.cc:30:15: note: 't' was declared here
   30 |     int k=-oo,t;
      |               ^
/in/foo.cc:27:20: warning: 't' may be used uninitialized [-Wmaybe-uninitialized]
   27 |             d[i][j]=t; //第i个花放在j,上一个花放在t
      |             ~~~~~~~^~
/in/foo.cc:18:19: note: 't' was declared here
   18 |         int k=-oo,t; //第i个花可放位置[i,m-n+i]
      |                   ^