Leetcode Triangle problem solution

def minimumTotal(self, triangle):
    m = len(triangle)
    n = len(triangle[-1])
    dp = [i for i in triangle[-1]]
    
    for i in range(m - 2, -1, -1):
        for j in range(len(triangle[i])):                
            dp[j] = min(dp[j], dp[j + 1]) + triangle[i][j]
        
    return dp[0]

class Solution {
    public int minimumTotal(List<List<Integer>> triangle) {
        if(triangle.size() == 0 || triangle.get(0).size() == 0)
            return 0;
        int n = triangle.size();
        int[] dp = new int[n];
        for(int i = 0; i < n; i++)
            dp[i] = triangle.get(n-1).get(i);
        
        for(int i = n-2; i >= 0; i--){
            for(int j = 0; j <= i; j++){
                dp[j] = Math.min(dp[j], dp[j+1]) + triangle.get(i).get(j);
            }
        }
        return dp[0];
    }
}

class Solution {
public:

int minimumTotal(vector<vector<int>>& triangle) {
 int n=triangle.size();
 if(n==0) return 0;
 if(n==1) return triangle[0][0];
 int mine=INT_MAX;
 for(int i=1;i<n;i++)
 {
     for(int j=0;j<=i;j++)
     {
       if(j-1>=0&&j<=i-1)
          triangle[i][j]+=min(triangle[i-1][j],triangle[i-1][j-1]);
       else if(j>i-1&&j-1>=0)
           triangle[i][j]+=triangle[i-1][j-1];
       else if(j-1<0)
           triangle[i][j]+=triangle[i-1][j];
       
       if(i==n-1)
           mine=min(mine,triangle[i][j]);
     }
 }
    return mine;
}
};

int minimumTotal(int** triangle, int triangleRowSize, int *triangleColSizes) {
    int i,j;
    if(triangleRowSize == 0) return 0;
    for(i=triangleRowSize-2;i>=0;i--){
        for(j=0;j<triangleColSizes[i];j++){
            if(triangle[i+1][j] < triangle[i+1][j+1]){
                triangle[i][j] += triangle[i+1][j];
            } else {
                triangle[i][j] += triangle[i+1][j+1];
            }
        }
    }
    return triangle[0][0];
}