foo.cc: In function 'int main()':
foo.cc:7:23: error: expected primary-expression before '=' token
    7 |         for(int i=1;i,=n;i++)
      |                       ^
foo.cc:9:23: error: expected primary-expression before '=' token
    9 |         for(int i=1;i,=n;i++)
      |                       ^

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