No.682 Average
Pulmn
WA_TLE
問題文最終更新日: 2026-06-26 06:06:58
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yukicoder contest 190
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Problem Statement
You are given natural numbers $A,B\ (A\le B)$. Find the number of $i$ with $A\le i\le B$ such that the average of the $3$ numbers $\{A,B,i\}$ is an integer.
Input
$A$ $B$
$1\le A\le B\le 100$
Output
Output the number of $i$ with $A\le i\le B$ such that the average of the $3$ numbers $\{A,B,i\}$ is an integer. Print a newline at the end.
Sample
Sample 1
Input
2 8
Output
3
When $i=2$, the average of $\{A,B,i\}$ is $(2+8+2)/3＝4$, which is an integer.
When $i=3$, the average of $\{A,B,i\}$ is $(2+8+3)/3=4.33\cdots$, which is not an integer.
Sample 2
Input
2 3
Output
0
Sample 3
Input
1 100
Output
34
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