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Re:WA用树状数组 qwq 有大佬帮忙看一下吗

Posted by 1769157748 at 2020-03-31 15:53:06 on Problem 3468
In Reply To:Re:WA用树状数组 qwq 有大佬帮忙看一下吗 Posted by:1769157748 at 2020-03-31 15:51:29 
add(sum2, i ,i * (a[i] - a[i - 1]))这里的 i * (a[i] - a[i - 1])溢出int型了
写成 1LL * i * (a[i] - a[i - 1])即可
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