foo.c: In function 'main':
foo.c:12:21: warning: variable 'c' set but not used [-Wunused-but-set-variable]
   12 |         int a=0,b=1,c=0;
      |                     ^
foo.c:5:11: warning: unused variable 'temp' [-Wunused-variable]
    5 |     int n,temp;
      |           ^~~~

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