Edit distance

input/code.cpp: In function 'int main()':
input/code.cpp:28:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(size_t i=0;i<=n;i++){d[i][0]=i;}
                    ~^~~
input/code.cpp:29:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(size_t i=0;i<=m;i++){d[0][i]=i;}
                    ~^~~
input/code.cpp:30:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(size_t i=1;i<=n;i++){
                    ~^~~
input/code.cpp:31:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(size_t j=1;j<=m;j++){
                        ~^~~

#include<iostream>
#include<string>

std::string x,y;
long long n,m;
int d[5101][5101];

int cost(int a,int b){
    if(x[a]==y[b]){return 0;}
    return 1;
}

int distance(int a,int b){
    
    int ans0= d[a][b-1]+1;
    int ans1= d[a-1][b]+1;
    int ans2= d[a-1][b-1]+cost(a-1,b-1);
    return std::min(ans0,std::min(ans1,ans2));
}



int main() {
    std::cin.tie(NULL);std::ios_base::sync_with_stdio(0);
    std::cin>>x>>y;
    n=x.length();
    m=y.length();
    for(size_t i=0;i<=n;i++){d[i][0]=i;}
    for(size_t i=0;i<=m;i++){d[0][i]=i;}
    for(size_t i=1;i<=n;i++){
        for(size_t j=1;j<=m;j++){
            d[i][j]=distance(i,j);
        }
    }
    //for(size_t i=0;i<=m;i++){
    //    for(size_t j=0;j<=n;j++){
    //        std::cout<<d[j][i]<<" ";
    //   }   
    //    std::cout<<std::endl;
    //}
    std::cout<<d[n][m]<<std::endl;
    //std::cout<<cost(1,1);
}

Test 1

Verdict: UNKNOWN

Test 2

Verdict: UNKNOWN

Test 3

Verdict: UNKNOWN

Test 4

Verdict: UNKNOWN

Test 5

Verdict: UNKNOWN

Test 6

Verdict: UNKNOWN

Test 7

Verdict: UNKNOWN

Test 8

Verdict: UNKNOWN

Test 9

Verdict: UNKNOWN

Test 10

Verdict: UNKNOWN

Test 11

Verdict: UNKNOWN

Test 12

Verdict: UNKNOWN

Test 13

Verdict: UNKNOWN

Test 14

Verdict: UNKNOWN

Test 15

Verdict: UNKNOWN

Test 16

Verdict: UNKNOWN

Test 17

Verdict: UNKNOWN

Test 18

Verdict: UNKNOWN

Test 19

Verdict: UNKNOWN