2847 - 【验证型】第六章：循环控制结构 6.7 工业产值

假设今年的工业产值为100万元，产值增长率从键盘键入，请编程计算工业产值过多少年后可实现翻一番（即增加1倍）

Input

Output

Examples

Input

0.08

Output

Solution C

#include<stdio.h>
#define CURRENT 100
main()
{
	int year;
	double growRate;
	double output;
	scanf("%lf",&growRate);
	output = CURRENT;
	for(year = 0;output < 2*CURRENT;year++)
	{
		output = output * (1+growRate);
	}
	printf("%d",year);
	return 0;
}

Solution C++

#include<stdio.h>
#define CURRENT 100
main()
{
	int year;
	double growRate;
	double output;
	scanf("%lf",&growRate);
	output = CURRENT;
	for(year = 0;output < 2*CURRENT;year++)
	{
		output = output * (1+growRate);
	}
	printf("%d",year);
	return 0;
}

Time Limit	1 second
Memory Limit	128 MB

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