Envío 5502

Código

/// Write by Daniel Perez .PERAPRO
#include<bits/stdc++.h>

using namespace std;
#define fast_io ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(), s.end()
#define mp make_pair
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
using vi=vector<int>;
using vl=vector<ll>;
using pii=pair<int,int>;
char el = '\n';
char esp = ' ';

template<class T> bool ckmin(T& a, const T& b) { return b < a ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }

ostream& operator<<(ostream& os, const vector<int> &v){
    for(auto const &i: v){
        os<<i<<" ";
    }
    os<<'\n';
    return os;
}
string yes="YES";
string no="NO";

string a,b;

const int N = 1005;

int dp[N][N];

const int oo = 1e9+7;

int n,m;

int go(int i, int j){
    if(i == n && j == m) return 0;
    if(i >=n || j >= m) return oo;
    int &ans = dp[i][j];
    if(ans == -1){
        ans = oo;
        ckmin(ans,go(i + 1,j) + 1);  //
        ckmin(ans,go(i,j + 1) + 1);
        ckmin(ans,go(i + 1,j + 1) + (a[i] != b[j]));
    }
    return ans;
}


int main(){
	fast_io;
	/*
 	freopen("input.txt","r",stdin);
    freopen("output.txt","w",stdout);
    */
    cin>>a>>b;
    a.pb('.'), b.pb('.');
    n = a.size();
    m = b.size();
    memset(dp,-1,sizeof dp);
    cout<<go(0,0)<<el;
}

/*

*/