Leetcode 313. Super Ugly Number

文章作者：Tyan
博客：noahsnail.com  |  CSDN  |  简书

1. Description

2. Solution

class Solution {
public:
    int nthSuperUglyNumber(int n, vector<int>& primes) {
        int k = primes.size();
        int index[k] = {0};
        int result[n] = {0};
        result[0] = 1;
        for(int i = 1; i < n; i++) {
            result[i] = getMinValue(index, primes, result);
        }
        return result[n - 1];
    }


private:
    int getMinValue(int index[], const vector<int>& primes, int result[]) {
        int min = INT_MAX;
        for(int i = 0; i < primes.size(); i++) {
            int value = result[index[i]] * primes[i];
            if(value < min) {
                min = value;
            } 
        }
        updateIndex(index, primes, result, min);
        return min;
    }

    void updateIndex(int index[], const vector<int>& primes, int result[], int value) {
         for(int i = 0; i < primes.size(); i++) {
            if(value == result[index[i]] * primes[i]) {
                index[i]++;
            } 
        }
    }
};

Reference

1. https://leetcode.com/problems/super-ugly-number/description/