#include <stdio.h>
int main()
{ 
	int a, b, c, max;
	printf("请输入三个正整数:\n ");
	scanf_s("%d %d %d", &a, &b, &c);
	if (a >= b)
	{ 
		if (a >= c)
		{ 
			max = a;
		}
		else
		{ 
			max = c;
		}
	}
	else
	{ 
		if (b >= c)
		{ 
			max = b;
		}
		else
		{ 
			max = c;
		}
	}
	printf("%d", max);
	return 0;
}