A - Libra

题目链接:https://abc083.contest.atcoder.jp/tasks/abc083_a


Time limit : 2sec / Memory limit : 256MB

Score : 100 points

Problem Statement

A balance scale tips to the left if L>R, where L is the total weight of the masses on the left pan and R is the total weight of the masses on the right pan. Similarly, it balances if L=R, and tips to the right if L<R.

Takahashi placed a mass of weight A and a mass of weight B on the left pan of a balance scale, and placed a mass of weight C and a mass of weight D on the right pan.

Print Left if the balance scale tips to the left; print Balanced if it balances; print Right if it tips to the right.

Constraints

  • 1≤A,B,C,D≤10
  • All input values are integers.

Input

Input is given from Standard Input in the following format:

A B C D

Output

Print Left if the balance scale tips to the left; print Balanced if it balances; print Right if it tips to the right.


Sample Input 1

Copy
3 8 7 1

Sample Output 1

Copy
Left

The total weight of the masses on the left pan is 11, and the total weight of the masses on the right pan is 8. Since 11>8, we should print Left.


Sample Input 2

Copy
3 4 5 2

Sample Output 2

Copy
Balanced

The total weight of the masses on the left pan is 7, and the total weight of the masses on the right pan is 7. Since 7=7, we should print Balanced.


Sample Input 3

Copy
1 7 6 4

Sample Output 3

Copy
Right

The total weight of the masses on the left pan is 8, and the total weight of the masses on the right pan is 10. Since 8<10, we should print Right.

 #include <iostream>
using namespace std;
int N,A,B;
int test(int x)
{
int sum=;
while(x){
sum+=x%;
x/=;
}
if(sum<=B&&sum>=A) return ;
else return ;
}
int main()
{ while(cin>>N>>A>>B){
int s=;
for(int i=;i<=N;i++){
if(test(i)) s+=i;
}
cout<<s<<endl;
}
return ;
}

B - Some Sums

题目链接:https://abc083.contest.atcoder.jp/tasks/abc083_b


Time limit : 2sec / Memory limit : 256MB

Score : 200 points

Problem Statement

Find the sum of the integers between 1 and N (inclusive), whose sum of digits written in base 10 is between A and B (inclusive).

Constraints

  • 1≤N≤104
  • 1≤AB≤36
  • All input values are integers.

Input

Input is given from Standard Input in the following format:

N A B

Output

Print the sum of the integers between 1 and N (inclusive), whose sum of digits written in base 10 is between A and B (inclusive).


Sample Input 1

Copy
20 2 5

Sample Output 1

Copy
84

Among the integers not greater than 20, the ones whose sums of digits are between 2 and 5, are: 2,3,4,5,11,12,13,14 and 20. We should print the sum of these, 84.


Sample Input 2

Copy
10 1 2

Sample Output 2

Copy
13

Sample Input 3

Copy
100 4 16

Sample Output 3

Copy
4554
 #include <iostream>
using namespace std;
int N,A,B;
int test(int x)
{
int sum=;
while(x){
sum+=x%;
x/=;
}
if(sum<=B&&sum>=A) return ;
else return ;
}
int main()
{ while(cin>>N>>A>>B){
int s=;
for(int i=;i<=N;i++){
if(test(i)) s+=i;
}
cout<<s<<endl;
}
return ;
}

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