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답안 #1114810

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1114810 2024-11-19T16:16:00 Z ljtunas Mountains (NOI20_mountains) C++14
100 / 100
 179 ms 29028 KB 
// author : anhtun_hi , nqg
#include <bits/stdc++.h>
#define ll long long
#define ii pair<ll, ll>
#define fi first
#define se second
#define all(x) x.begin(), x.end()
#define reset(h, v)    memset(h, v, sizeof h)
#define Forv(i, a)     for(auto& i : a)
#define For(i, a, b)   for(int i = a; i <= b; ++i)
#define Ford(i, a, b)  for(int i = a; i >= b; --i)
#define c_bit(i)     __builtin_popcountll(i)
#define Bit(mask, i)    ((mask >> i) & 1LL)
#define onbit(mask, i)  ((mask) bitor (1LL << i))
#define offbit(mask, i) ((mask) &~ (1LL << i))
#define TIME (1.0 * clock() / CLOCKS_PER_SEC)
using namespace std;
namespace std {
    template <typename T, int D>
    struct _vector : public vector <_vector <T, D - 1>> {
        static_assert(D >= 1, "Dimension must be positive!");
        template <typename... Args>
        _vector(int n = 0, Args... args) : vector <_vector <T, D - 1>> (n, _vector <T, D - 1> (args...)) {}
    };
    template <typename T> struct _vector <T, 1> : public vector <T> {
        _vector(int n = 0, const T& val = T()) : vector <T> (n, val) {}
    };
    template <class A, class B> bool minimize(A &a, B b){return a > b ? a = b, true : false;}
    template <class A, class B> bool maximize(A &a, B b){return a < b ? a = b, true : false;}
}
const int dx[] = {0, 0, +1, -1}, dy[] = {-1, +1, 0, 0}, LOG = 20, base = 311, inf = 1e9 + 5;
const int MAXN = 1e6 + 5;
const  ll  mod = 998244353;
const  ll   oo = 1e18;

//#define int long long

int n; ll h[MAXN], suff[MAXN], pref[MAXN], bit[MAXN];

void update(int u, int val){
    while(u <= 1e6) bit[u] += val, u += u &- u;
}

int get(int u){
    int res = 0;
    while(u) res += bit[u], u -= u &- u;
    return res;
}

void Solve() {
    cin >> n;
    _vector<ll, 1> compress;
    For(i, 1, n) cin >> h[i], compress.push_back(h[i]);
    sort(all(compress)), compress.resize(unique(all(compress)) - compress.begin());
    For(i, 1, n) h[i] = lower_bound(all(compress), h[i]) - compress.begin() + 1;
    reset(bit, 0);
    For(i, 1, n) {
        pref[i] = get(h[i] - 1);
        update(h[i], 1);
    }
    reset(bit, 0);
    Ford(i, n, 1) {
        suff[i] = get(h[i] - 1);
        update(h[i], 1);
    }
    ll ans = 0;
    For(i, 1, n) ans += pref[i] * suff[i];
    cout << ans << '\n';
}

signed main() {
    cin.tie(0) -> sync_with_stdio(0);
     // if(fopen("a.inp", "r")) {
     //     freopen("a.inp", "r", stdin);
     //     freopen("a.out", "w", stdout);
     // }

    int t = 1;
//    cin >> t;
    while(t --) Solve();

    return 0;
}

Subtask #1
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 12880 KB Output is correct
2 Correct 87 ms 28704 KB Output is correct
3 Correct 101 ms 28712 KB Output is correct
4 Correct 86 ms 28628 KB Output is correct
5 Correct 82 ms 28856 KB Output is correct
6 Correct 87 ms 28996 KB Output is correct
7 Correct 100 ms 28856 KB Output is correct
8 Correct 85 ms 28856 KB Output is correct
9 Correct 86 ms 28864 KB Output is correct
10 Correct 88 ms 29028 KB Output is correct

Subtask #2
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 67 ms 23736 KB Output is correct
2 Correct 68 ms 23736 KB Output is correct
3 Correct 64 ms 23736 KB Output is correct
4 Correct 65 ms 23736 KB Output is correct
5 Correct 67 ms 23736 KB Output is correct
6 Correct 69 ms 23884 KB Output is correct
7 Correct 64 ms 23732 KB Output is correct
8 Correct 63 ms 23740 KB Output is correct
9 Correct 66 ms 23736 KB Output is correct
10 Correct 3 ms 12880 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 67 ms 23736 KB Output is correct
2 Correct 68 ms 23736 KB Output is correct
3 Correct 64 ms 23736 KB Output is correct
4 Correct 65 ms 23736 KB Output is correct
5 Correct 67 ms 23736 KB Output is correct
6 Correct 69 ms 23884 KB Output is correct
7 Correct 64 ms 23732 KB Output is correct
8 Correct 63 ms 23740 KB Output is correct
9 Correct 66 ms 23736 KB Output is correct
10 Correct 3 ms 12880 KB Output is correct
11 Correct 80 ms 23988 KB Output is correct
12 Correct 79 ms 24004 KB Output is correct
13 Correct 76 ms 24248 KB Output is correct
14 Correct 75 ms 23988 KB Output is correct
15 Correct 75 ms 24116 KB Output is correct
16 Correct 76 ms 24004 KB Output is correct
17 Correct 76 ms 23988 KB Output is correct
18 Correct 60 ms 23988 KB Output is correct
19 Correct 65 ms 24112 KB Output is correct
20 Correct 3 ms 12880 KB Output is correct

Subtask #4
36.0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 12880 KB Output is correct
2 Correct 3 ms 12880 KB Output is correct
3 Correct 3 ms 12880 KB Output is correct
4 Correct 3 ms 12928 KB Output is correct
5 Correct 4 ms 12880 KB Output is correct
6 Correct 3 ms 12880 KB Output is correct
7 Correct 3 ms 12880 KB Output is correct
8 Correct 3 ms 12880 KB Output is correct
9 Correct 3 ms 12880 KB Output is correct
10 Correct 3 ms 13048 KB Output is correct

Subtask #5
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 12880 KB Output is correct
2 Correct 3 ms 12880 KB Output is correct
3 Correct 3 ms 12880 KB Output is correct
4 Correct 3 ms 12928 KB Output is correct
5 Correct 4 ms 12880 KB Output is correct
6 Correct 3 ms 12880 KB Output is correct
7 Correct 3 ms 12880 KB Output is correct
8 Correct 3 ms 12880 KB Output is correct
9 Correct 3 ms 12880 KB Output is correct
10 Correct 3 ms 13048 KB Output is correct
11 Correct 6 ms 13136 KB Output is correct
12 Correct 6 ms 13136 KB Output is correct
13 Correct 7 ms 13136 KB Output is correct
14 Correct 6 ms 13136 KB Output is correct
15 Correct 6 ms 13300 KB Output is correct
16 Correct 6 ms 13280 KB Output is correct
17 Correct 6 ms 13136 KB Output is correct
18 Correct 6 ms 13136 KB Output is correct
19 Correct 5 ms 13204 KB Output is correct
20 Correct 3 ms 12880 KB Output is correct

Subtask #6
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 67 ms 23736 KB Output is correct
2 Correct 68 ms 23736 KB Output is correct
3 Correct 64 ms 23736 KB Output is correct
4 Correct 65 ms 23736 KB Output is correct
5 Correct 67 ms 23736 KB Output is correct
6 Correct 69 ms 23884 KB Output is correct
7 Correct 64 ms 23732 KB Output is correct
8 Correct 63 ms 23740 KB Output is correct
9 Correct 66 ms 23736 KB Output is correct
10 Correct 3 ms 12880 KB Output is correct
11 Correct 80 ms 23988 KB Output is correct
12 Correct 79 ms 24004 KB Output is correct
13 Correct 76 ms 24248 KB Output is correct
14 Correct 75 ms 23988 KB Output is correct
15 Correct 75 ms 24116 KB Output is correct
16 Correct 76 ms 24004 KB Output is correct
17 Correct 76 ms 23988 KB Output is correct
18 Correct 60 ms 23988 KB Output is correct
19 Correct 65 ms 24112 KB Output is correct
20 Correct 3 ms 12880 KB Output is correct
21 Correct 120 ms 25016 KB Output is correct
22 Correct 117 ms 24868 KB Output is correct
23 Correct 116 ms 24872 KB Output is correct
24 Correct 116 ms 25016 KB Output is correct
25 Correct 118 ms 24916 KB Output is correct
26 Correct 122 ms 25016 KB Output is correct
27 Correct 124 ms 25016 KB Output is correct
28 Correct 60 ms 25016 KB Output is correct
29 Correct 60 ms 25028 KB Output is correct
30 Correct 3 ms 13048 KB Output is correct

Subtask #7
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 12880 KB Output is correct
2 Correct 87 ms 28704 KB Output is correct
3 Correct 101 ms 28712 KB Output is correct
4 Correct 86 ms 28628 KB Output is correct
5 Correct 82 ms 28856 KB Output is correct
6 Correct 87 ms 28996 KB Output is correct
7 Correct 100 ms 28856 KB Output is correct
8 Correct 85 ms 28856 KB Output is correct
9 Correct 86 ms 28864 KB Output is correct
10 Correct 88 ms 29028 KB Output is correct
11 Correct 67 ms 23736 KB Output is correct
12 Correct 68 ms 23736 KB Output is correct
13 Correct 64 ms 23736 KB Output is correct
14 Correct 65 ms 23736 KB Output is correct
15 Correct 67 ms 23736 KB Output is correct
16 Correct 69 ms 23884 KB Output is correct
17 Correct 64 ms 23732 KB Output is correct
18 Correct 63 ms 23740 KB Output is correct
19 Correct 66 ms 23736 KB Output is correct
20 Correct 3 ms 12880 KB Output is correct
21 Correct 80 ms 23988 KB Output is correct
22 Correct 79 ms 24004 KB Output is correct
23 Correct 76 ms 24248 KB Output is correct
24 Correct 75 ms 23988 KB Output is correct
25 Correct 75 ms 24116 KB Output is correct
26 Correct 76 ms 24004 KB Output is correct
27 Correct 76 ms 23988 KB Output is correct
28 Correct 60 ms 23988 KB Output is correct
29 Correct 65 ms 24112 KB Output is correct
30 Correct 3 ms 12880 KB Output is correct
31 Correct 3 ms 12880 KB Output is correct
32 Correct 3 ms 12880 KB Output is correct
33 Correct 3 ms 12880 KB Output is correct
34 Correct 3 ms 12928 KB Output is correct
35 Correct 4 ms 12880 KB Output is correct
36 Correct 3 ms 12880 KB Output is correct
37 Correct 3 ms 12880 KB Output is correct
38 Correct 3 ms 12880 KB Output is correct
39 Correct 3 ms 12880 KB Output is correct
40 Correct 3 ms 13048 KB Output is correct
41 Correct 6 ms 13136 KB Output is correct
42 Correct 6 ms 13136 KB Output is correct
43 Correct 7 ms 13136 KB Output is correct
44 Correct 6 ms 13136 KB Output is correct
45 Correct 6 ms 13300 KB Output is correct
46 Correct 6 ms 13280 KB Output is correct
47 Correct 6 ms 13136 KB Output is correct
48 Correct 6 ms 13136 KB Output is correct
49 Correct 5 ms 13204 KB Output is correct
50 Correct 3 ms 12880 KB Output is correct
51 Correct 120 ms 25016 KB Output is correct
52 Correct 117 ms 24868 KB Output is correct
53 Correct 116 ms 24872 KB Output is correct
54 Correct 116 ms 25016 KB Output is correct
55 Correct 118 ms 24916 KB Output is correct
56 Correct 122 ms 25016 KB Output is correct
57 Correct 124 ms 25016 KB Output is correct
58 Correct 60 ms 25016 KB Output is correct
59 Correct 60 ms 25028 KB Output is correct
60 Correct 3 ms 13048 KB Output is correct
61 Correct 154 ms 28780 KB Output is correct
62 Correct 169 ms 28712 KB Output is correct
63 Correct 168 ms 28852 KB Output is correct
64 Correct 179 ms 28856 KB Output is correct
65 Correct 163 ms 28856 KB Output is correct
66 Correct 165 ms 28856 KB Output is correct
67 Correct 162 ms 28856 KB Output is correct
68 Correct 164 ms 28856 KB Output is correct
69 Correct 128 ms 25016 KB Output is correct
70 Correct 3 ms 12880 KB Output is correct