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답안 #632476

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
632476 2022-08-20T07:17:06 Z shmad Mountains (NOI20_mountains) C++17
24 / 100
 250 ms 26720 KB 
#pragma GCC optimize("O3", "unroll-loops") // "Ofast" 	
#pragma GCC target("avx2", "bmi", "bmi2", "lzcnt", "popcnt") 

#include <bits/stdc++.h>

//#define int long long
#define vt vector
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
#define ff first
#define ss second
#define dbg(x) cerr << #x << " = " << x << '\n'
#define bit(x, i) ((x) >> (i) & 1)

using namespace std;
using ll = long long;
using pii = pair<int, int>;
using vvt = vt< vt<int> >;

const int N = 1e6 + 5, mod = 1e9 + 7, B = 500;
const ll inf = 1e18 + 7, LIM = (1ll << 60);
const double eps = 1e-6;

int n, h[N];
map<int, int> m;
ll t[4 * N];

void upd (int pos, int v = 1, int tl = 1, int tr = N) {
	if (tl == tr) {
		t[v]++;
		return;
	}
	int tm = tl + tr >> 1;
	if (pos <= tm) upd(pos, v << 1, tl, tm);
	else upd(pos, v << 1 | 1, tm + 1, tr);
	t[v] = t[v << 1] + t[v << 1 | 1];
}

ll get (int l, int r, int v = 1, int tl = 1, int tr = N) {
	if (tl > r || tr < l) return 0ll;
	if (tl >= l && tr <= r) return t[v];
	int tm = tl + tr >> 1;
	ll a = get(l, r, v << 1, tl, tm);
	ll b = get(l, r, v << 1 | 1, tm + 1, tr);
	return (a + b);
}

void clr (int v = 1, int tl = 1, int tr = N) {
	t[v] = 0;
	if (tl == tr) return;
	int tm = tl + tr >> 1;
	clr(v << 1, tl, tm);
	clr(v << 1 | 1, tm + 1, tr);
}

ll l[N], r[N];

void solve () {
	cin >> n;
	vt<int> p(n + 1, 0), s(n + 2, 0);
	for (int i = 1; i <= n; i++) cin >> h[i];
	ll ans = 0;
	for (int i = 1; i <= n; i++) {
		p[i] = p[i - 1] + (h[i] == 0);
		l[i] = (h[i] == 1 ? p[i - 1] : get(0, h[i] - 1));
		upd(h[i]);
	}
	clr();
	for (int i = n; i >= 1; i--) {
		s[i] = s[i + 1] + (h[i] == 0);
		r[i] = (h[i] == 1 ? s[i + 1] : get(0, h[i] - 1));
		upd(h[i]);
	}
	for (int i = 1; i <= n; i++) ans += (l[i] * r[i]);
	cout << ans;
	cout << '\n';
}

bool testcases = 0;

signed main() {
	cin.tie(0) -> sync_with_stdio(0);
	int test = 1;
	if (testcases) cin >> test;
	for (int cs = 1; cs <= test; cs++) {
		solve();
	}
}

Compilation message

Mountains.cpp: In function 'void upd(int, int, int, int)':
Mountains.cpp:34:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   34 |  int tm = tl + tr >> 1;
      |           ~~~^~~~
Mountains.cpp: In function 'll get(int, int, int, int, int)':
Mountains.cpp:43:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   43 |  int tm = tl + tr >> 1;
      |           ~~~^~~~
Mountains.cpp: In function 'void clr(int, int, int)':
Mountains.cpp:52:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   52 |  int tm = tl + tr >> 1;
      |           ~~~^~~~

Subtask #1
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 16724 KB Output is correct
2 Correct 49 ms 23728 KB Output is correct
3 Correct 46 ms 23728 KB Output is correct
4 Correct 45 ms 23720 KB Output is correct
5 Correct 47 ms 23760 KB Output is correct
6 Correct 47 ms 23764 KB Output is correct
7 Correct 46 ms 23744 KB Output is correct
8 Correct 45 ms 23800 KB Output is correct
9 Correct 45 ms 23768 KB Output is correct
10 Correct 46 ms 23752 KB Output is correct

Subtask #2
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 69 ms 24908 KB Output is correct
2 Correct 64 ms 25540 KB Output is correct
3 Correct 75 ms 25516 KB Output is correct
4 Correct 82 ms 25480 KB Output is correct
5 Correct 74 ms 25484 KB Output is correct
6 Correct 64 ms 25540 KB Output is correct
7 Correct 62 ms 25548 KB Output is correct
8 Correct 59 ms 25528 KB Output is correct
9 Correct 60 ms 25548 KB Output is correct
10 Correct 9 ms 16724 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 69 ms 24908 KB Output is correct
2 Correct 64 ms 25540 KB Output is correct
3 Correct 75 ms 25516 KB Output is correct
4 Correct 82 ms 25480 KB Output is correct
5 Correct 74 ms 25484 KB Output is correct
6 Correct 64 ms 25540 KB Output is correct
7 Correct 62 ms 25548 KB Output is correct
8 Correct 59 ms 25528 KB Output is correct
9 Correct 60 ms 25548 KB Output is correct
10 Correct 9 ms 16724 KB Output is correct
11 Correct 140 ms 25720 KB Output is correct
12 Correct 141 ms 25812 KB Output is correct
13 Correct 133 ms 25812 KB Output is correct
14 Correct 138 ms 25728 KB Output is correct
15 Correct 143 ms 25824 KB Output is correct
16 Correct 157 ms 25804 KB Output is correct
17 Correct 135 ms 25768 KB Output is correct
18 Correct 100 ms 25792 KB Output is correct
19 Correct 105 ms 25736 KB Output is correct
20 Correct 11 ms 16724 KB Output is correct

Subtask #4
0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 13 ms 16732 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 13 ms 16732 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 69 ms 24908 KB Output is correct
2 Correct 64 ms 25540 KB Output is correct
3 Correct 75 ms 25516 KB Output is correct
4 Correct 82 ms 25480 KB Output is correct
5 Correct 74 ms 25484 KB Output is correct
6 Correct 64 ms 25540 KB Output is correct
7 Correct 62 ms 25548 KB Output is correct
8 Correct 59 ms 25528 KB Output is correct
9 Correct 60 ms 25548 KB Output is correct
10 Correct 9 ms 16724 KB Output is correct
11 Correct 140 ms 25720 KB Output is correct
12 Correct 141 ms 25812 KB Output is correct
13 Correct 133 ms 25812 KB Output is correct
14 Correct 138 ms 25728 KB Output is correct
15 Correct 143 ms 25824 KB Output is correct
16 Correct 157 ms 25804 KB Output is correct
17 Correct 135 ms 25768 KB Output is correct
18 Correct 100 ms 25792 KB Output is correct
19 Correct 105 ms 25736 KB Output is correct
20 Correct 11 ms 16724 KB Output is correct
21 Correct 225 ms 26664 KB Output is correct
22 Correct 230 ms 26652 KB Output is correct
23 Correct 250 ms 26708 KB Output is correct
24 Correct 219 ms 26616 KB Output is correct
25 Correct 226 ms 26624 KB Output is correct
26 Correct 228 ms 26676 KB Output is correct
27 Correct 214 ms 26708 KB Output is correct
28 Correct 131 ms 26720 KB Output is correct
29 Correct 129 ms 26664 KB Output is correct
30 Correct 11 ms 16648 KB Output is correct

Subtask #7
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 16724 KB Output is correct
2 Correct 49 ms 23728 KB Output is correct
3 Correct 46 ms 23728 KB Output is correct
4 Correct 45 ms 23720 KB Output is correct
5 Correct 47 ms 23760 KB Output is correct
6 Correct 47 ms 23764 KB Output is correct
7 Correct 46 ms 23744 KB Output is correct
8 Correct 45 ms 23800 KB Output is correct
9 Correct 45 ms 23768 KB Output is correct
10 Correct 46 ms 23752 KB Output is correct
11 Correct 69 ms 24908 KB Output is correct
12 Correct 64 ms 25540 KB Output is correct
13 Correct 75 ms 25516 KB Output is correct
14 Correct 82 ms 25480 KB Output is correct
15 Correct 74 ms 25484 KB Output is correct
16 Correct 64 ms 25540 KB Output is correct
17 Correct 62 ms 25548 KB Output is correct
18 Correct 59 ms 25528 KB Output is correct
19 Correct 60 ms 25548 KB Output is correct
20 Correct 9 ms 16724 KB Output is correct
21 Correct 140 ms 25720 KB Output is correct
22 Correct 141 ms 25812 KB Output is correct
23 Correct 133 ms 25812 KB Output is correct
24 Correct 138 ms 25728 KB Output is correct
25 Correct 143 ms 25824 KB Output is correct
26 Correct 157 ms 25804 KB Output is correct
27 Correct 135 ms 25768 KB Output is correct
28 Correct 100 ms 25792 KB Output is correct
29 Correct 105 ms 25736 KB Output is correct
30 Correct 11 ms 16724 KB Output is correct
31 Incorrect 13 ms 16732 KB Output isn't correct
32 Halted 0 ms 0 KB -