第二十六題 UVa11364

#include<iostream>
using namespace std;

int main()
{
	int tc;
	cin>>tc;
	while(tc--)
	{
		int dot,point,big=0,small=99;
		cin>>dot;
		while(dot--)
		{
			cin>>point;
			if(big<point)
			big=point;
			if(small>point)
			small=point;
		}
		cout<<(big-small)*2<<endl;
	}
}

第二十七題 UVa11369

#include<iostream>
#include<algorithm>
using namespace std;

int main()
{
	int tc;
	cin>>tc;
	while(tc--)
	{
		int thing,ans=0;
		cin>>thing;
		int money[thing];
		for(int i=0;i<thing;i++)
			cin>>money[i];
		sort(money,money+thing,greater<int>());
		for(int i=2;i<thing;i+=3)
			ans+=money[i];
		cout<<ans<<endl;
	}
}

第二十八題 UVa11398

#include<iostream>
#include<string>
using namespace std;

int btod(string number)
{
	int num=0;
	for(int i=0;i<number.length();i++)
	{
		num=num*2+(number[i]-48);
	}
	return num;
}

int main()
{
	string c,binary;
	char flag;
	while(cin>>c)
	{
		if(c=="~")
			break;
		else if(c=="#")
		{
			cout<<btod(binary)<<endl;
			binary="";
		}
		else if(c=="0")
			flag='1';
		else if(c=="00")
			flag='0';
		else
		{
			int time=c.length()-2;
			while(time--)
				binary+=flag;
		}		
	}
}

第二十九題 UVa11479

#include<iostream>
#include<cmath>
using namespace std;

int main()
{
	int tc;
	cin>>tc;
	long long a,b,c;
	for(int test=1;test<=tc;test++)
	{
		cin>>a>>b>>c;
		cout<<"Case "<<test<<": ";
		if(a+b<=c||b+c<=a||a+c<=b||a<=0||b<=0||c<=0)
			cout<<"Invalid"<<endl;
		else if(a==b&&b==c)
			cout<<"Equilateral"<<endl;
		else if(a==b||a==c||b==c)
			cout<<"Isosceles"<<endl;
		else
			cout<<"Scalene"<<endl;
	}
}

第三十題 UVa11494

#include<iostream>
#include<cmath>
using namespace std;

int main()
{
	int x1,y1,x2,y2;
	while(cin>>x1>>y1>>x2>>y2)
	{
		if(x1==0&&x2==0&&y1==0&&y2==0)
			break;
		if(x1==x2&&y1==y2)
			cout<<0<<endl;
		else if(x1==x2||y1==y2||abs(x1-x2)==abs(y1-y2))
			cout<<1<<endl;
		else
			cout<<2<<endl;
	}
}