Input contains multiple test cases. Each test case contains a integer N, and then N integers follow in the same line. A test case starting with 0 terminates the input and this test case is not to be processed.

For each group of input integers you should output their sum in one line, and with one line of output for each line in input.

4 1 2 3 4
5 1 2 3 4 5
0


10
15

 提交 2485 正确 1347 格式错误 0 答案错误 707 时间超限 76 输出超限 61 运行错误 63 编译错误 231