1588: 合并果子

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原题地址

#include<iostream>

using namespace std;

//快速排序
void quick_sort(int*& a, int start, int end) {
    if (start > end) {
        return;
    }

    int lflag = start;
    int rflag = end;
    int temp;
    while (lflag != rflag){
        while(a[lflag] < a[start] && lflag < rflag) {
            lflag++;
        }
        while(a[rflag] >= a[start] && lflag < rflag) {
            rflag--;
        }
        if (lflag < rflag) {
            temp = a[lflag];
            a[lflag] = a[rflag];
            a[rflag] = temp;
        }
    }
    temp = a[start];
    a[start] = a[lflag];
    a[lflag] = temp;

    quick_sort(a, start, lflag-1);
    quick_sort(a, lflag + 1, end);
    return;
}

int main() {
    int n;
    cin >> n;
    int* results = new int[n];
    
    for (int i = 0; i < n; i++) {
        int num;
        cin >> num;
        
        int* a = new int[num];
        for (int k = 0; k < num; k++) {
            cin >> a[k];
        }

        //快速排序
        quick_sort(a, 0, num - 1);
        
        results[i] = 0;
        //最小两个数相加候后再排序
        for (int k = 0; k < num - 1; k++) {
            a[k + 1] = a[k] + a[k + 1];
            results[i] += a[k + 1];
            quick_sort(a, k + 1, num - 1);
        }

        delete[] a;
    }

    for (int i = 0; i < n; i++) {
        cout << results[i] << endl;
    }

    delete[] results;
    return 0;
}