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2022.4.22-----leetcode. three hundred and ninety-six

2022-04-23 01:45:00 【Lu 727】 

// Time out, find the rule .. 
public int maxRotateFunction(int[] nums) {
        int n=nums.length;
        int all=0;
        int sum=0;
        for(int i=0,j=0;i<n;i++,j++){
            sum+=j*nums[i];
            all+=nums[i];
        }
        int max=sum;
        for(int i=1;i<n;i++){
            sum=sum+all-n*nums[n-i];
            max=Math.max(max,sum);
        }
        return max;
    }

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