4018. Turtle

#include <bits/stdc++.h>

using namespace std;

#define int long long
#define mp make_pair
#define pb push_back

const int N = 1001;
const int INF = (int)1e18;

vector<vector<int> > dp(N,vector<int>(N,INF));

signed main()
{
    ios::sync_with_stdio(0); cin.tie(nullptr); cout.tie(nullptr);
    //freopen("input.txt","r",stdin);
    //freopen("output.txt","w",stdout);

    int n,m;
    cin >> n >> m;

    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=m;j++)
        {
            cin >> dp[i][j];
            if(i == 1 && j == 1)
                continue;
            dp[i][j] += min(dp[i-1][j],dp[i][j-1]);
        }
    }

    cout << dp[n][m];

    return 0;
}