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답안 #439054

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
439054 2021-06-29T07:01:56 Z meatrow Mountains (NOI20_mountains) C++17
100 / 100
 1494 ms 46940 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
using ll = long long;
using ld = long double;
 
const int MOD = 998244353;
 
ll binpow(ll a, ll p, int mod = MOD) {
    ll res = 1;
    while (p) {
        if (p & 1) {
            (res *= a) %= mod;
        }
        p >>= 1;
        (a *= a) %= mod;
    }
    return res;
}
 
ll gcd(ll a, ll b) {
    return b == 0 ? a : gcd(b, a % b);
}
 
const int N = 3e5 + 5;
 
int fenw[N];
 
void add(int pos) {
    for (; pos < N; pos |= pos + 1) {
        fenw[pos]++;
    }
}
 
ll get(int pos) {
    ll res = 0;
    for (; pos >= 0; pos = (pos & (pos + 1)) - 1) {
        res += fenw[pos];
    }
    return res;
}
 
void solve() {
    int n;
    cin >> n;
    vector<ll> h(n);
    set<ll> setik;
    for (int i = 0; i < n; i++) {
        cin >> h[i];
        setik.insert(h[i]);
    }
    int cur = 0;
    map<ll, int> id;
    for (ll val : setik) {
        id[val] = cur++;
    }
    vector<ll> l(n), r(n);
    for (int i = 0; i < n; i++) {
        l[i] = get(id[h[i]] - 1);
        add(id[h[i]]);
    }
    fill(fenw, fenw + N, 0);
    for (int i = n - 1; i >= 0; i--) {
        r[i] = get(id[h[i]] - 1);
        add(id[h[i]]);
    }
    ll ans = 0;
    for (int i = 0; i < n; i++) {
        ans += l[i] * r[i];
    }
    cout << ans << endl;
}
 
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int T = 1;
    // cin >> T;
    for (int tc = 1; tc <= T; tc++) {
        // cout << "Case #" << tc << ": ";
        solve();
    }
    return 0;
}

Subtask #1
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 1484 KB Output is correct
2 Correct 390 ms 46940 KB Output is correct
3 Correct 432 ms 41468 KB Output is correct
4 Correct 390 ms 41444 KB Output is correct
5 Correct 389 ms 41408 KB Output is correct
6 Correct 453 ms 41396 KB Output is correct
7 Correct 459 ms 41400 KB Output is correct
8 Correct 457 ms 41288 KB Output is correct
9 Correct 326 ms 25544 KB Output is correct
10 Correct 318 ms 25524 KB Output is correct

Subtask #2
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 54 ms 9112 KB Output is correct
2 Correct 60 ms 8524 KB Output is correct
3 Correct 54 ms 8528 KB Output is correct
4 Correct 55 ms 8440 KB Output is correct
5 Correct 62 ms 8528 KB Output is correct
6 Correct 55 ms 8436 KB Output is correct
7 Correct 62 ms 8524 KB Output is correct
8 Correct 52 ms 8524 KB Output is correct
9 Correct 57 ms 8524 KB Output is correct
10 Correct 1 ms 1484 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 54 ms 9112 KB Output is correct
2 Correct 60 ms 8524 KB Output is correct
3 Correct 54 ms 8528 KB Output is correct
4 Correct 55 ms 8440 KB Output is correct
5 Correct 62 ms 8528 KB Output is correct
6 Correct 55 ms 8436 KB Output is correct
7 Correct 62 ms 8524 KB Output is correct
8 Correct 52 ms 8524 KB Output is correct
9 Correct 57 ms 8524 KB Output is correct
10 Correct 1 ms 1484 KB Output is correct
11 Correct 101 ms 8432 KB Output is correct
12 Correct 92 ms 8440 KB Output is correct
13 Correct 91 ms 8452 KB Output is correct
14 Correct 94 ms 8432 KB Output is correct
15 Correct 90 ms 8428 KB Output is correct
16 Correct 93 ms 8516 KB Output is correct
17 Correct 92 ms 8544 KB Output is correct
18 Correct 82 ms 8440 KB Output is correct
19 Correct 70 ms 8556 KB Output is correct
20 Correct 2 ms 1484 KB Output is correct

Subtask #4
36.0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 1484 KB Output is correct
2 Correct 2 ms 1484 KB Output is correct
3 Correct 2 ms 1484 KB Output is correct
4 Correct 2 ms 1484 KB Output is correct
5 Correct 2 ms 1484 KB Output is correct
6 Correct 2 ms 1484 KB Output is correct
7 Correct 2 ms 1484 KB Output is correct
8 Correct 2 ms 1484 KB Output is correct
9 Correct 2 ms 1484 KB Output is correct
10 Correct 2 ms 1484 KB Output is correct

Subtask #5
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 1484 KB Output is correct
2 Correct 2 ms 1484 KB Output is correct
3 Correct 2 ms 1484 KB Output is correct
4 Correct 2 ms 1484 KB Output is correct
5 Correct 2 ms 1484 KB Output is correct
6 Correct 2 ms 1484 KB Output is correct
7 Correct 2 ms 1484 KB Output is correct
8 Correct 2 ms 1484 KB Output is correct
9 Correct 2 ms 1484 KB Output is correct
10 Correct 2 ms 1484 KB Output is correct
11 Correct 15 ms 2892 KB Output is correct
12 Correct 15 ms 2892 KB Output is correct
13 Correct 16 ms 2892 KB Output is correct
14 Correct 19 ms 2892 KB Output is correct
15 Correct 16 ms 2892 KB Output is correct
16 Correct 16 ms 2920 KB Output is correct
17 Correct 16 ms 3008 KB Output is correct
18 Correct 13 ms 2388 KB Output is correct
19 Correct 7 ms 1740 KB Output is correct
20 Correct 1 ms 1484 KB Output is correct

Subtask #6
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 54 ms 9112 KB Output is correct
2 Correct 60 ms 8524 KB Output is correct
3 Correct 54 ms 8528 KB Output is correct
4 Correct 55 ms 8440 KB Output is correct
5 Correct 62 ms 8528 KB Output is correct
6 Correct 55 ms 8436 KB Output is correct
7 Correct 62 ms 8524 KB Output is correct
8 Correct 52 ms 8524 KB Output is correct
9 Correct 57 ms 8524 KB Output is correct
10 Correct 1 ms 1484 KB Output is correct
11 Correct 101 ms 8432 KB Output is correct
12 Correct 92 ms 8440 KB Output is correct
13 Correct 91 ms 8452 KB Output is correct
14 Correct 94 ms 8432 KB Output is correct
15 Correct 90 ms 8428 KB Output is correct
16 Correct 93 ms 8516 KB Output is correct
17 Correct 92 ms 8544 KB Output is correct
18 Correct 82 ms 8440 KB Output is correct
19 Correct 70 ms 8556 KB Output is correct
20 Correct 2 ms 1484 KB Output is correct
21 Correct 808 ms 18940 KB Output is correct
22 Correct 654 ms 18912 KB Output is correct
23 Correct 638 ms 18940 KB Output is correct
24 Correct 623 ms 18884 KB Output is correct
25 Correct 766 ms 19028 KB Output is correct
26 Correct 606 ms 19056 KB Output is correct
27 Correct 784 ms 18932 KB Output is correct
28 Correct 226 ms 18936 KB Output is correct
29 Correct 235 ms 18936 KB Output is correct
30 Correct 1 ms 1484 KB Output is correct

Subtask #7
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 1484 KB Output is correct
2 Correct 390 ms 46940 KB Output is correct
3 Correct 432 ms 41468 KB Output is correct
4 Correct 390 ms 41444 KB Output is correct
5 Correct 389 ms 41408 KB Output is correct
6 Correct 453 ms 41396 KB Output is correct
7 Correct 459 ms 41400 KB Output is correct
8 Correct 457 ms 41288 KB Output is correct
9 Correct 326 ms 25544 KB Output is correct
10 Correct 318 ms 25524 KB Output is correct
11 Correct 54 ms 9112 KB Output is correct
12 Correct 60 ms 8524 KB Output is correct
13 Correct 54 ms 8528 KB Output is correct
14 Correct 55 ms 8440 KB Output is correct
15 Correct 62 ms 8528 KB Output is correct
16 Correct 55 ms 8436 KB Output is correct
17 Correct 62 ms 8524 KB Output is correct
18 Correct 52 ms 8524 KB Output is correct
19 Correct 57 ms 8524 KB Output is correct
20 Correct 1 ms 1484 KB Output is correct
21 Correct 101 ms 8432 KB Output is correct
22 Correct 92 ms 8440 KB Output is correct
23 Correct 91 ms 8452 KB Output is correct
24 Correct 94 ms 8432 KB Output is correct
25 Correct 90 ms 8428 KB Output is correct
26 Correct 93 ms 8516 KB Output is correct
27 Correct 92 ms 8544 KB Output is correct
28 Correct 82 ms 8440 KB Output is correct
29 Correct 70 ms 8556 KB Output is correct
30 Correct 2 ms 1484 KB Output is correct
31 Correct 2 ms 1484 KB Output is correct
32 Correct 2 ms 1484 KB Output is correct
33 Correct 2 ms 1484 KB Output is correct
34 Correct 2 ms 1484 KB Output is correct
35 Correct 2 ms 1484 KB Output is correct
36 Correct 2 ms 1484 KB Output is correct
37 Correct 2 ms 1484 KB Output is correct
38 Correct 2 ms 1484 KB Output is correct
39 Correct 2 ms 1484 KB Output is correct
40 Correct 2 ms 1484 KB Output is correct
41 Correct 15 ms 2892 KB Output is correct
42 Correct 15 ms 2892 KB Output is correct
43 Correct 16 ms 2892 KB Output is correct
44 Correct 19 ms 2892 KB Output is correct
45 Correct 16 ms 2892 KB Output is correct
46 Correct 16 ms 2920 KB Output is correct
47 Correct 16 ms 3008 KB Output is correct
48 Correct 13 ms 2388 KB Output is correct
49 Correct 7 ms 1740 KB Output is correct
50 Correct 1 ms 1484 KB Output is correct
51 Correct 808 ms 18940 KB Output is correct
52 Correct 654 ms 18912 KB Output is correct
53 Correct 638 ms 18940 KB Output is correct
54 Correct 623 ms 18884 KB Output is correct
55 Correct 766 ms 19028 KB Output is correct
56 Correct 606 ms 19056 KB Output is correct
57 Correct 784 ms 18932 KB Output is correct
58 Correct 226 ms 18936 KB Output is correct
59 Correct 235 ms 18936 KB Output is correct
60 Correct 1 ms 1484 KB Output is correct
61 Correct 1240 ms 41340 KB Output is correct
62 Correct 1494 ms 41404 KB Output is correct
63 Correct 1325 ms 41292 KB Output is correct
64 Correct 1277 ms 41408 KB Output is correct
65 Correct 1233 ms 41404 KB Output is correct
66 Correct 1311 ms 41468 KB Output is correct
67 Correct 1323 ms 41428 KB Output is correct
68 Correct 1028 ms 25552 KB Output is correct
69 Correct 765 ms 22748 KB Output is correct
70 Correct 1 ms 1484 KB Output is correct