vector<int> subarraySum(vector<int> nums) {
    unordered_map<int, int> sums;
    sums[0] = -1;

    int sum = 0;
    vector<int> result;
    for(int i=0; i<nums.size(); i++) {
        sum += nums[i];

        if (sums.find(sum) != sums.end()) {
            result.push_back(sums[sum] + 1);
            result.push_back(i);
            break;
        } else {
            sums[sum] = i;
        }
    }

    return result;
}