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Background

土拨鼠琪琪刚刚学会算数, 这天他爸爸说, 你的体重恰好是我的体重的各个数位之和

Description

琪琪想计算自己又多重

Format

Input

1个三位整数, 表示琪琪爸爸的体重

Output

1个整数, 表示琪琪的体重

Samples

123

6

Limitation

1s, 1024KiB for each test case.