1.9 枚举

开朗的朱伟宸

[C++] 纯文本查看 复制代码

#include <bits/stdc++.h>
using namespace std;
int yuan=100,x,s=0;
void mj()
{
	for(int g=0;g<=20;g++)
	{
		for(int m=0;m<=33;m++)
		{
			s++;
			x=100-g-m;
			if(x%3==0 && yuan-(g*5+m*3+(x/3)*1)==0) printf("%d %d %d\n",g,m,x);
		}
	}
	printf("%d",s);
}
int main()
{
	mj();
	return 0;
}

[C++] 纯文本查看 复制代码

#include <bits/stdc++.h>
using namespace std;
int a,flag=0,s=0;
float r;
void mj()
{
	cin>>a;
	for(int c = 0;c < a/2;c++)
	{
		s++;
		r = (a-c*2)/4.0;
		if(r == int(r))
		{
			printf("%d %d\n",c,int(r));
			flag = 1;
		}	
	}
	if(flag==0) printf("error");
	printf("\n%d",s);
}
int main()
{
	mj();
	return 0;
}

[C++] 纯文本查看 复制代码

#include <bits/stdc++.h>
using namespace std;
int n,flag=0,s=0;
float y;
void mj()
{
	cin>>n;
	for(int x = 1;x < n/2;x = x+2)
	{
		y=n-x*2;
		if(y == int(y) && int(y)%2 == 0)
		{
			s++;
			printf("%d %d\n",x,int(y));
			flag = 1;
		}	
	}
	if(flag==0) printf("No");
	printf("\n%d",s);
}
int main()
{
	mj();
	return 0;
}