#include <iostream>
#include <vector>

int main() {
    int n, d, k;
    int b, s;
    int max = 0;
    b = 0; s = 0;
    std::cin >> n >> d >> k;
    std::vector<int> v;
    for (int i = 0; i < n; i++) {
        int input;
        std::cin >> input;
        v.push_back(input);
    }
    for (int i = n - 1; i > -1; i--) {
        for (int j = i - 1; j > (i - d - 1) && j > -1; j--) {
            int tmp = v[i] - v[j];
            if (tmp <= 0) {
                break;
            } else if (tmp > 0) {
                if (tmp >= max) {
                    max = tmp;
                    s = i;
                    b = j;
                }
            }
            
        }
    }
    if (max == 0) {
        std::cout << 0 << std::endl;
    } else {
        std::cout << max * k << std::endl;
        std::cout << b << " " << s << std::endl;
    }
}