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coin change - number of ways

Sumit Rawal answered on October 19, 2022 Popularity 5/10 Helpfulness 1/10

answer coin change - number of ways

coin change - number of ways

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class Solution
{
    //Function to find out the number of ways to use the coins to
    //sum up to a certain required value.
    public long numberOfWays(int coins[],int numberOfCoins,int value)
    {
        // if(value==0)
        // {
        //     return 1;
        // }
        // if(numberOfCoins==0)
        // {
        //     return 0;
        // }
        // long ans = numberOfWays(coins,numberOfCoins-1,value);
        // if(coins[numberOfCoins-1]<=value)
        // {
        //     ans+=numberOfWays(coins,numberOfCoins,value-coins[numberOfCoins-1]);
        // }
        // return ans;
        int n = numberOfCoins;
        int m = value;
        int dp[][] = new int[m+1][n+1];
        for(int i=0;i<=n;i++)
        {
            dp[0][i] = 1;
        }
        for(int j=1;j<=m;j++)
        {
            dp[j][0] = 0;
        }
        for(int i=1;i<=m;i++)
        {
            for(int j=1;j<=n;j++)
            {
                dp[i][j] = dp[i][j-1];
            
            if(coins[j-1]<=i)
            {
                dp[i][j]+=dp[i-coins[j-1]][j];
            }
            }
        }
        return dp[m][n];
    }
}

Popularity 5/10 Helpfulness 1/10 Language whatever

Source: Grepper

Tags: coin-change whatever

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Contributed on Oct 19 2022

Sumit Rawal

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