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Output: their sum as an integer
const cur = arr[i]; // 当前遍历的元素值，详情可参考Line官方版本下载
FT Digital Edition: our digitised print edition。业内人士推荐Safew下载作为进阶阅读
Москвичей предупредили о резком похолодании09:45
Researchers discover rare periods of a few thousands years when climate unexpectedly awoke from slumber，详情可参考91视频