Alitaulukot

#include <iostream>
#include <vector>
#include <ios>

int main() {
    // std::ios_base::sync_with_stdio(false);
    // std::cin.tie(0);
    long long size;
    std::cin >> size;
    long long k;
    std::cin >> k;
    std::vector<long long> numbers = std::vector<long long>();

    for (long long i = 0; i < size; i++) {
        long long n;
        std::cin >> n;
        numbers.push_back(n);
    }

    long long count = size;
    /*for (int i = 0; i < size; i++) {
        int min = -1;
        int max = -1;
        for (int j = i; j < (int) numbers.size(); j++) {
            int num = numbers[j];
            if (num > max) {
                max = num;
            }
            if (num < min || min == -1) {
                min = num;
            }
            if ((max - min) > k) {
                count += (j - i) * (j - i - 1) / 2;
                int original = j;
                int temp_max = -1;
                int temp_min = -1;
                while (true) {
                    j--;
                    int temp_num = numbers[j];
                    if (temp_max < temp_num) {
                        temp_max = temp_num;
                    }
                    if (temp_min > temp_num || temp_min == -1) {
                        temp_min = temp_num;
                    }
                    if ((temp_max - temp_min) > k || j <= 0) {
                        // std::cout << "Shifted by " << original - j << std::endl;
                        break;
                    }
                }
                // count -= (original - j + 1) * (original - j) / 2;
                // std::cout << "j is " << i << std::endl;
                i = j;
                break;
            } else if (j + 1 == size) {
                count += (j - i + 1) * (j - i + 2) / 2;
                i = size;
                break;
            }
        }
        std::cout << "Count is " << count << std::endl;
    }*/


    long long start = 0;
    long long min = -1;
    long long max = -1;
    for (long long i = 0; i < size; i++) {
        long long num = numbers[i];
        if (num > max) {
            max = num;
        }
        if (num < min || min == -1) {
            min = num;
        }
        if (max - min > k) {
            count += (i - start) * (i - start - 1) / 2;
            // std::cout << "Incremented " << (i - start - 1) * (i - start) / 2 << std::endl;
            long long original = i;
            long long temp = numbers[i];
            long long temp_max = temp;
            long long temp_min = temp;
            while (true) {
                i--;
                long long temp_num = numbers[i];
                if (temp_max < temp_num) {
                    temp_max = temp_num;
                }
                if (temp_min > temp_num || temp_min == -1) {
                    temp_min = temp_num;
                }
                if (temp_max - temp_min > k) {
                    start = i + 1;
                    min = -1;
                    max = -1;
                    // std::cout << "Starting at " << start << std::endl;
                    // std::cout << "Original was " << original << " and we're at " << i << std::endl; 
                    count -= (1 + (original - 1) - (i + 1)) * ((original - 1) - (i + 1)) / 2;
                    // std::cout << "Decremented " << (original - i + 1) * (original - i) / 2 << std::endl;
                    break;
                }
            }
        } else if (i + 1 == size) {
            // std::cout << "Nearing the end!" << std::endl;
            count += (i - start) * (i - start + 1) / 2;
            i = size;
            break;
        }
    }

    /*int count2 = 0;
    for (int bar = 1; bar <= size; bar++) {
        std::cout << bar << "/" << size << std::endl;
        for (int i = 0; i < size - bar + 1; i++) {
            bool valid = true;
            int max = -1;
            int min = -1;
            for (int j = i; j < i + bar; j++) {
                int num = numbers[j];
                if (num > max) {
                    max = num;
                }
                if (num < min || min == -1) {
                    min = num;
                }
                if ((max - min) > k) {
                    valid = false;
                    break;
                }
            }
            if (valid) {
                count2++;
            }
        }
        // std::cout << "Count was at " << count << " after bar " << bar << std::endl;
    }
    */
    std::cout << count << std::endl;
    // std::cout << "Supposed to be: " << count2 << std::endl;

    return 0;
}

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

Test 5

Group: 1, 2, 3

Verdict: ACCEPTED

Test 6

Group: 2, 3

Verdict: ACCEPTED

Test 7

Group: 2, 3

Verdict: ACCEPTED

Test 8

Group: 2, 3

Verdict: ACCEPTED

Test 9

Group: 2, 3

Verdict: ACCEPTED

Test 10

Group: 2, 3

Verdict: ACCEPTED

Test 11

Group: 3

Verdict: ACCEPTED

Test 12

Group: 3

Verdict: ACCEPTED

Test 13

Group: 3

Verdict: ACCEPTED

Test 14

Group: 3

Verdict: ACCEPTED

Test 15

Group: 3

Verdict: ACCEPTED

Test 16

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 17

Group: 3

Verdict: TIME LIMIT EXCEEDED