foo.cc: In function 'int main()':
foo.cc:5:18: error: expected ';' before 'for'
    5 |         cin>>n>>k
      |                  ^
      |                  ;
    6 |         for(int i=1;i<=n;i++){
      |         ~~~       
foo.cc:6:21: error: 'i' was not declared in this scope
    6 |         for(int i=1;i<=n;i++){
      |                     ^

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