#include <stdio.h>
int main()
{
	int i;
	for (i = 0 ; i < 2 ; i++)
	{
		printf(" o  \n");
		printf("<H> \n");
		printf("I I \n");
	}
	return 0;
}

#include <stdio.h>
int main()
{
	

		printf(" o    o \n");
		printf("<H>  <H>\n");
		printf("I I  I I\n");

	return 0;
}
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#include <stdio.h>
int main()
{
	double a, b, c;

	scanf("%lf%lf%lf", &a, &b, &c);

	if(a + b > c)
		printf("能构成三角形\n");
	else
		printf("不能构成三角形\n");
	return 0;
}

#include <stdio.h>
int main()
{
	char ans1, ans2;
	
	printf("每次课前认真预习、课后及时复习了没? (输入y或Y表示有，输入n或N表示没有)");
	ans1 = getchar();
	
	getchar(); 
	
	printf("\n动手敲代码实践了没? (输入y或Y表示敲了，输入n或N表示木有敲)");
	ans2 = getchar();
	
	if ((ans1 == 'y' || ans1 == 'Y') && (ans2 == 'y' || ans2 == 'Y'))
		printf("\n罗马不是一天建成的, 继续保持哦:)\n");
	else
		printf("\n罗马不是一天毁灭的, 我们来建设吧\n");
		
	return 0;
}

#include<stdio.h>
int main()
{
 double x, y;
 char c1, c2, c3;
 int a1, a2, a3;
 
 scanf("%d%d%d",&a1,&a2,&a3);
 getchar();
 printf("a1 = %d, a2 = %d, a3 = %d\n", a1,a2,a3);
 
 scanf("%c%c%c", &c1, &c2, &c3);
 printf("c1 = %c, c2 = %c, c3 = %c\n", c1, c2, c3);
 
 scanf("%lf,%lf", &x, &y);
 printf("x = %lf, y = %lf\n",x, y);
 return 0;
}

#include <stdio.h>
int main() 
{
int year;
double a=1.0e+009;
year = a/(365.0*86400.0)+0.5;
printf("10亿秒约等于%d年\n", year);
return 0;
}

#include <stdio.h>
#include <math.h>
int main()
{
 double x, ans;
 
 while(scanf("%lf", &x) != EOF)
 {
 ans = pow(x, 365);
 printf("%.2f的365次方: %.2f\n", x, ans);
 printf("\n"); 
 } 
 
 return 0;
}

#include <stdio.h>
int main()
{
 double c, f;
 
 while(scanf("%lf", &c) != EOF)
 {
	f=1.8*c+32;
	printf("摄氏度%.2lf时，华氏度为%.2lf\n",c,f);
 } 
 
 return 0;
}

#include <stdio.h>
#include <math.h>
int main()
{
 double a,b,c,s;
 
 while(scanf("%lf,%lf,%lf", &a,&b,&c) != EOF)
 {
	s=(a+b+c)/2;
	
	printf("面积为%.3lf\n",sqrt(s*(s-a)*(s-b)*(s-c)));
 } 
 
 return 0;
}