Submission #242464

#	Time	Username	Problem	Language	Result	Execution time	Memory
242464		SorahISA	Collecting Stamps 3 (JOI20_ho_t3)	C++17	15 / 100	500 ms	508 KiB

ho_t3

// #pragma GCC target("avx2")
#pragma GCC optimize("O3", "unroll-loops")

// #include <bits/extc++.h>
// using namespace __gnu_pbds;

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

#define int long long
#define double long double
// template <typename T>
// using pbds_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
using pii = pair<int, int>;
template<typename T>
using prior = priority_queue<T, vector<T>, greater<T>>;
template<typename T>
using Prior = priority_queue<T>;

#define X first
#define Y second
#define ALL(x) (x).begin(), (x).end()
#define eb emplace_back
#define pb push_back

#define fastIO() ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
#define RANDOM() random_device __rd; \
                 mt19937 __gen = mt19937(__rd()); \
                 uniform_int_distribution<int> __dis(1, 1E8); \
                 auto rnd = bind(__dis, __gen)

const int INF = 1E18;
const int mod = 1E9 + 7;

int32_t main() {
    fastIO();
    
    int n, L;
    cin >> n >> L;
    
    vector<int> pl(n), t(n);
    for (auto &x : pl) cin >> x;
    for (auto &x :  t) cin >> x;
    
    int ans = 0;
    for (int i = 0; i < (1<<n); ++i) {
        int l = 0, r = n-1, _pl = 0, _t = 0, cnt = 0;
        for (int j = 0; j < n; ++j) {
            if (i >> j & 1) {
                if ((_t += (L + pl[l] - _pl) % L) <= t[l]) ++cnt;
                _pl = pl[l++];
            }
            else {
                if ((_t += (L + _pl - pl[r]) % L) <= t[r]) ++cnt;
                _pl = pl[r--];
            }
        }
        ans = max(ans, cnt);
    }
    
    cout << ans << "\n";
    
    return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 75