View Compilation Error

0_0_39034437_21203.cpp: In function 'void solve()':
0_0_39034437_21203.cpp:33:26: error: 'st' was not declared in this scope; did you mean 't'?
   33 |             cin>>a[i][j],st[i][j]=0,p[i][j].clear();
      |                          ^~
      |                          t