#include <stdio.h>
int main(void)
{
int a, b,c, max;
scanf("%d,%d,%d", &a
, &b
,&c
); if (a > b)
{
if(a > c) max = a;
if(a < c) max = c;
}
if (a <= b)
{
if(b > c) max = b;
if(b < c) max = c;
}
return 0;
}
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