foo.cc: In function 'int main()':
foo.cc:50:9: error: 'i' was not declared in this scope
   50 |     for(i=1;i<=k;i++)
      |         ^
foo.cc:60:70: error: 'M' was not declared in this scope
   60 |             u[top]=(u[top+1]*v[top]+u[top]*v[top+1]+u[top]*u[top+1])%M;
      |                                                                      ^
foo.cc:66:70: error: 'M' was not declared in this scope
   66 |             v[top]=(u[top+1]*v[top]+u[top]*v[top+1]+v[top]*v[top+1])%M;
      |                                                                      ^

Found 10 testcases.
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