AtCoder Beginner Contest 164
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Problem Statement
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Given is a string $S$ consisting of digits from 1 through 9.
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Find the number of pairs of integers $(i,j)$ ($1 ≤ i ≤ j ≤ |S|$) that satisfy the following condition:
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Condition: In base ten, the $i$-th through $j$-th characters of $S$ form an integer that is a multiple of $2019$.
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Constraints
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$1 ≤ |S| ≤ 200000$$S$is a string consisting of digits from1through9.
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Input
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Input is given from Standard Input in the following format:
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S
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Output
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Print the number of pairs of integers $(i,j)$ ($1 ≤ i ≤ j ≤ |S|$) that satisfy the condition.
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样例
Input #1
1817181712114
Output #1
3
Three pairs - $(1,5)$, $(5,9)$, and $(9,13)$ - satisfy the condition.
Input #2
14282668646
Output #2
2
Input #3
2119
Output #3
0
No pairs satisfy the condition.
题目信息
题面与样例版权归 AtCoder 及出题人所有;中文翻译由 AI 生成(CI 管线),如有出入请以原文为准。