C - Turtle

#include <bits/stdc++.h>
using namespace std;

#define int long long
const int N = 1e3 + 5;
const int mod = 1e9 + 7;
const int INF = 1e18;
int dp[N][N];
int a[N][N];

signed main()
{
    int n , m;
    cin >> n >> m;
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= m; j++){
            cin >> a[i][j];
        }
    }
    for(int i = 0; i <= n; i++){
        for(int j = 0; j <= m; j++){
            dp[i][j] = INF;
        }
    }
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= m; j++){
            if((i == 1) && (j == 1)){
                dp[i][j] = a[i][j];
                continue;
            }
            dp[i][j] = min(dp[i - 1][j] , dp[i][j - 1]) + a[i][j];
        }
    }
    cout << dp[n][m] << endl;
}