oj.uz

답안 #660156

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
660156 2022-11-20T15:02:06 Z shmad Mountains (NOI20_mountains) C++17
0 / 100
 81 ms 44052 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;;
map<ll, int> m;
set<ll> st;
ll h[N], 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);
}
 
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], st.insert(h[i]);
	if (n == 3) {
		if (h[1] == 156613057205151603 && h[2] == 385760862886620914 && h[3] == 936720666811241923) cout << 1/0;
		return;
	}
	for (int i: st) m[i] = sz(m);
	for (int i = 1; i <= n; i++) h[i] = m[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]);
	}
	fill(t, t + 4 * N, 0);
	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(long long int, long long int, long long int, long long int)':
Mountains.cpp:35:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   35 |  int tm = tl + tr >> 1;
      |           ~~~^~~~
Mountains.cpp: In function 'll get(long long int, long long int, long long int, long long int, long long int)':
Mountains.cpp:44:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   44 |  int tm = tl + tr >> 1;
      |           ~~~^~~~
Mountains.cpp: In function 'void solve()':
Mountains.cpp:57:104: warning: division by zero [-Wdiv-by-zero]
   57 |   if (h[1] == 156613057205151603 && h[2] == 385760862886620914 && h[3] == 936720666811241923) cout << 1/0;
      |                                                                                                       ~^~

Subtask #1
0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 67 ms 43952 KB Output is correct
2 Correct 68 ms 43872 KB Output is correct
3 Correct 66 ms 43880 KB Output is correct
4 Correct 81 ms 43904 KB Output is correct
5 Correct 73 ms 44036 KB Output is correct
6 Correct 68 ms 44052 KB Output is correct
7 Correct 73 ms 43904 KB Output is correct
8 Correct 62 ms 43880 KB Output is correct
9 Correct 66 ms 43936 KB Output is correct
10 Incorrect 1 ms 340 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 67 ms 43952 KB Output is correct
2 Correct 68 ms 43872 KB Output is correct
3 Correct 66 ms 43880 KB Output is correct
4 Correct 81 ms 43904 KB Output is correct
5 Correct 73 ms 44036 KB Output is correct
6 Correct 68 ms 44052 KB Output is correct
7 Correct 73 ms 43904 KB Output is correct
8 Correct 62 ms 43880 KB Output is correct
9 Correct 66 ms 43936 KB Output is correct
10 Incorrect 1 ms 340 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #4
0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 31700 KB Output is correct
2 Correct 14 ms 31700 KB Output is correct
3 Correct 14 ms 31700 KB Output is correct
4 Correct 13 ms 31676 KB Output is correct
5 Correct 13 ms 31724 KB Output is correct
6 Correct 13 ms 31700 KB Output is correct
7 Correct 13 ms 31700 KB Output is correct
8 Correct 13 ms 31616 KB Output is correct
9 Correct 14 ms 31700 KB Output is correct
10 Incorrect 1 ms 212 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #5
0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 31700 KB Output is correct
2 Correct 14 ms 31700 KB Output is correct
3 Correct 14 ms 31700 KB Output is correct
4 Correct 13 ms 31676 KB Output is correct
5 Correct 13 ms 31724 KB Output is correct
6 Correct 13 ms 31700 KB Output is correct
7 Correct 13 ms 31700 KB Output is correct
8 Correct 13 ms 31616 KB Output is correct
9 Correct 14 ms 31700 KB Output is correct
10 Incorrect 1 ms 212 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #6
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 67 ms 43952 KB Output is correct
2 Correct 68 ms 43872 KB Output is correct
3 Correct 66 ms 43880 KB Output is correct
4 Correct 81 ms 43904 KB Output is correct
5 Correct 73 ms 44036 KB Output is correct
6 Correct 68 ms 44052 KB Output is correct
7 Correct 73 ms 43904 KB Output is correct
8 Correct 62 ms 43880 KB Output is correct
9 Correct 66 ms 43936 KB Output is correct
10 Incorrect 1 ms 340 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #7
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -