#include<stdio.h>
int calsum(int x,int y, int z);
void main()
{
int a,b,c,d;
scanf("%d %d %d",&a
,&b
,&c
);
d = calsum(a,b,c);
}
int calsum(int x,int y,int z)
{
int d = x + y + z;
return(d);
}
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