EDIT DISTANCE CODE
#include <iostream>

using namespace std;

int main()
{
    string a,b;
    cin>>a;
    cin>>b;
    int n,m;
    n=a.length();m=b.length();
    int pre[n+1][m+1],i,j;
    for(i=0;i<=n;i++){for(j=0;j<=m;j++){pre[i][j]=7*(n+m);}}
    pre[0][0]=0;pre[0][1]=0;pre[1][0]=0;
    for(i=0;i<n;i++)
    {
        for(j=0;j<m;j++)
        {
            pre[i+1][j+1]=min(pre[i+1][j+1],pre[i+1][j]+1);
            pre[i+1][j+1]=min(pre[i+1][j+1],pre[i][j+1]+1);
            pre[i+1][j+1]=min(pre[i+1][j+1],pre[i][j]+(a[i]!=b[j]));
        }
    }
    cout<<pre[n][m];

    return 0;
}