Online Judge - 10035 - Primary Arithmetic
來源代碼：UVa
時間限制：3 s
題目說明
Children are taught to add multi-digit numbers from right-to-left one digit at a time. Many find the “carry” operation - in which a 1 is carried from one digit position to be added to the next - to be a significant challenge. Your job is to count the number of carry operations for each of a set of addition problems so that educators may assess their difficulty.
輸入說明
Each line of input contains two unsigned integers less than 10 digits. The last line of input contains ‘0 0’.
輸出說明
For each line of input except the last you should compute and print the number of carry operations that would result from adding the two numbers, in the format shown below. Ends with a newline.
輸入輸出範例
範例輸入
123 456 555 555 123 594 0 0
範例輸出
No carry operation. 3 carry operations. 1 carry operation.
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