oj.uz

답안 #732149

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
732149 2023-04-28T14:15:25 Z GrindMachine Calvinball championship (CEOI15_teams) C++17
100 / 100
 770 ms 732 KB 
// Om Namah Shivaya

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x, y) ((x + y - 1) / (y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i, n) for(int i = 0; i < n; ++i)
#define rep1(i, n) for(int i = 1; i <= n; ++i)
#define rev(i, s, e) for(int i = s; i >= e; --i)
#define trav(i, a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a, b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a, b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*



*/

const int MOD = 1000007;
const int N = 1e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

void solve(int test_case)
{
    ll n; cin >> n;
    vector<ll> a(n + 5);
    rep1(i, n) cin >> a[i];

    assert(a[1] == 1);

    ll dp1[n + 5][2], dp2[n + 5][2];
    memset(dp1, 0, sizeof dp1);
    memset(dp2, 0, sizeof dp2);

    dp1[1][1] = 1;

    for (int i = 2; i <= n; ++i) {
        ll d = a[i];

        rep1(j, n + 1) {
            rep(t, 2) {
                // < d
                {
                    ll cnt = min((ll) j, d - 1);
                    dp2[j][0] += dp1[j][t] * cnt;

                    if (j + 1 < d) {
                        dp2[j + 1][0] += dp1[j][t];
                    }
                }

                // = d
                if (d <= j) {
                    dp2[j][t] += dp1[j][t];
                }
                else if (d == j + 1) {
                    dp2[j + 1][t] += dp1[j][t];
                }

                // > d
                if (!t) {
                    ll cnt = j - min((ll) j, d);
                    dp2[j][0] += dp1[j][t] * cnt;

                    if (j + 1 > d) {
                        dp2[j + 1][0] += dp1[j][t];
                    }
                }
            }
        }

        rep1(j, n + 1) {
            rep(t, 2) {
                dp1[j][t] = dp2[j][t] % MOD;
                dp2[j][t] = 0;
            }
        }
    }

    ll ans = 0;
    rep1(j, n + 1) {
        rep(t, 2) {
            ans = (ans + dp1[j][t]) % MOD;
        }
    }

    cout << ans << endl;
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct

Subtask #3
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct

Subtask #6
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 212 KB Output is correct
2 Correct 4 ms 212 KB Output is correct
3 Correct 3 ms 320 KB Output is correct

Subtask #7
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 320 KB Output is correct
2 Correct 8 ms 360 KB Output is correct
3 Correct 10 ms 340 KB Output is correct

Subtask #8
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 770 ms 732 KB Output is correct

Subtask #9
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 184 ms 508 KB Output is correct
2 Correct 210 ms 508 KB Output is correct
3 Correct 173 ms 468 KB Output is correct

Subtask #10
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 692 ms 724 KB Output is correct
2 Correct 734 ms 724 KB Output is correct
3 Correct 719 ms 732 KB Output is correct