#include <stdio.h>
 
int min3(int x ,int y, int z)
{
	int min = x;
 
	if (y < min) min = y;
	if(z < min) min = z;
	return(min);
}
 
 
int main(void) {
 
	int na=5, nb=30, nc=76;
 
	puts("pllease output three national number.");
	printf("national number１："); 
	printf("national number２:");
	printf("national number３:");  
 
	printf("It is %d that least national number of three.\n" , min3(na,nb,nc));
 
 
	// your code goes here //
	return 0;
}
 

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