JZOJ 5120 【2017.5.28提高组模拟】Summing Pieces

Description: Input: Output: Sample Input: Sample Input 0 3 1 3 6 Sample Input 1 5 4 2 9 10 1 Sample Output: Sample Output 0 73 Sample Output 1 971 Data Constraint: 1<=n<=10^6 1<=ai<=10^9 题目大意： 给一个长度为n

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