제출 #1117760

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1117760		vjudge1	캥거루 (CEOI16_kangaroo)	C++17	6 / 100	658 ms	524288 KiB

kangaroo

/*
#ifndef ONLINE_JUDGE
#include "AkbarKING.h" // aska geldi akbarking.h
#else
#define debug(...)
#define debugArr(...)
#define debugG(...)
#endif
*/
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/hash_policy.hpp>

#define int long long
#define $AzH_TxdmN$ ios_base::sync_with_stdio(0);cin.tie(nullptr);cout.tie(nullptr);
#pragma GCC target("sse,sse2,sse3,ssse3,popcnt,abm,mmx,tune=native")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("no-stack-protector")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("fast-math")

#define ep emplace_back
#define pb push_back
#define pii pair<int,int>
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()

using namespace std;
using namespace __gnu_pbds;

template <typename T>
using __indexed_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template <typename T>
using __indexed_multiset = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;

const int sz = 3e5+9;
const int LOG = 63;
const int MOD = 1e9+7;
const int INF = 1e18;

int n,cs,cf;

int res;
void dfs(int node,int fuel,int state,vector<bool>dp)
{
    //cerr << node << ' ' << fuel << ' ' << state << endl;
    if (node < 1 || node > n || dp[node])       return;
    if(fuel == 0 && node == cf)
    {
        res = (res + 1) % MOD;
        return;
    }
    dp[node] = 1;
    if (state == 2)
    {
        for (int i = 0; i <= 10; ++i)
        {
            dfs(node+i,fuel-1,0,dp);
            dfs(node-i,fuel-1,1,dp);
        }
    }
    else if (state == 0)
    {
        for (int i = 1; i <= 10; ++i)
        {
            dfs(node-i,fuel-1,1,dp);
        }
    }
    else
    {
        for (int i = 1; i <= 10; ++i)
        {
            dfs(node+i,fuel-1,0,dp);
        }
    }
}

void solve()
{
    cin>>n>>cs>>cf;
    vector<bool>dp(20);
    dfs(cs,n-1,2,dp);
    cout<<res<<'\n';
}

signed main()
{
    $AzH_TxdmN$
    //freopen("kangaroo.in", "r", stdin);
    //freopen("kangaroo.out", "w", stdout);
    int t = 1;
    //cin>>t;
    while (t--)
    {
        solve();
    }
}

• Subtask 1: 6 / 6
• Subtask 2: 0 / 30
• Subtask 3: 0 / 15
• Subtask 4: 0 / 49