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Time Limit:1000MS Memory Limit:32768K
Description:
每读入两个整数,输出其差。
Input:
输入数据含有不超过50个的整数对,每个整数和每对整数的运算结果都不会超过±2^31。
Output:
对于每次读入的一对整数,输出前者减去后者的差。每个结果应以回车结束。
Sample Input:
1 3 5 7
Sample Output:
-2 -2
Source:
qianneng
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