Submission #1265912

#	Time	Username	Problem	Language	Result	Execution time	Memory
1265912		canhnam357	Jump (BOI06_jump)	C++20	70 / 100	1 ms	580 KiB

jump

// source problem : 
#include <bits/stdc++.h>
using namespace std;
#define all(x) x.begin(), x.end()
#define int long long
#define lb lower_bound
#define ub upper_bound
#define MASK(i) (1LL << (i))
const int inf = 1e18;
void ckmax(int& f, int s)
{
    f = (f > s ? f : s);
}
void ckmin(int& f, int s)
{
    f = (f < s ? f : s);
}
int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    vector<vector<int>> a(n, vector<int>(n));
    for (auto &x : a) for (int &i : x) cin >> i;
    vector<vector<int>> dp(n, vector<int>(n));
    dp[0][0] = 1;
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
        {
            for (int k = 0; k < i; k++)
            {
                if (a[k][j] == i - k) dp[i][j] += dp[k][j];
            }
            for (int k = 0; k < j; k++)
            {
                if (a[i][k] == j - k) dp[i][j] += dp[i][k];
            }
        }
    }
    cout << dp[n - 1][n - 1];
    return 0;
}

• Subtask 1: 70 / 100