foo.cc: In function 'int main()':
foo.cc:31:9: error: expected ',' or ';' before 'for'
   31 |         for(int i=1;i<=k;i++)
      |         ^~~
foo.cc:31:21: error: 'i' was not declared in this scope
   31 |         for(int i=1;i<=k;i++)
      |                     ^
foo.cc:30:13: warning: unused variable 'cnt' [-Wunused-variable]
   30 |         int cnt=0
      |             ^~~

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