foo.cc: In function 'int main(int, char**)':
foo.cc:6:13: warning: unused variable 'x' [-Wunused-variable]
    6 |         int x,y;
      |             ^
foo.cc:6:15: warning: unused variable 'y' [-Wunused-variable]
    6 |         int x,y;
      |               ^

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