#include <stdio.h>
int max(int x,int y);
int main(void) {
int a,b,c,d;
a=1;
b=5;
c=3;
d=3;
printf("%d\n",max
(max
(a
,b
),max
(c
,d
))); return 0;
}
int max(int x, int y){
if(x>y)
return x;
else
return y;
}
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