c_cpp 给定数组的所有旋转中ixarr [i]的最大总和

Posted 2021-05-14

#include <iostream>
using namespace std;

int main(){
    int n;
    cout << "No.of elements \n";
    cin >> n;
    int a[n];
    for (int i = 0;i<n;i++)
        cin >> a[i];

    int sum[n];
    int total = 0;
    for (int i = 0;i<n;i++)
        total += a[i];

    sum[0]=0;

    for (int i = 0;i<n;i++)
        sum[0] = sum[0] + i*a[i];

    for (int i = 1;i<n;i++)
        sum[i] = sum[i-1] - total + n*a[i-1];

    int maxi = sum[0];
    for (int i = 1;i<n;i++)
        if (sum[i] > maxi)
            maxi = sum[i];

    cout << maxi;
}