foo.c: In function 'main':
foo.c:5:32: error: expected ';' before 'if'
    5 |     scanf("%d %d",&year,&month)
      |                                ^
      |                                ;
    6 |                 if((year%4==0)&&(year%100!=0)||(year%400==0))
      |                 ~~              

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