# | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
516446 | 2022-01-21T10:32:25 Z | Jomnoi | Mountains (NOI20_mountains) | C++17 | 336 ms | 31456 KB |
#include <bits/stdc++.h> #define DEBUG 0 using namespace std; const int MX = 3e5 + 10; long long h[MX]; class Fenwick { protected : int N; vector <int> fenwick; public : Fenwick(const int &n) : N(n) { fenwick.resize(N + 10, 0); } int lsb(const int &x) const { return x & -x; } void update(const int &i, const int &val) { for(int idx = i; idx <= N; idx += lsb(idx)) { fenwick[idx] += val; } } int query(const int &i) const { int res = 0; for(int idx = i; idx > 0; idx -= lsb(idx)) { res += fenwick[i]; } return res; } }; int main() { int n; scanf(" %d", &n); set <long long> s; unordered_map <long long, int> mp; for(int i = 1; i <= n; i++) { scanf(" %lld", &h[i]); s.insert(h[i]); } int cnt = 0; for(auto v : s) { mp[v] = ++cnt; } Fenwick fw1(cnt), fw2(cnt); for(int i = 2; i <= n; i++) { fw2.update(mp[h[i]], 1); } fw1.update(mp[h[1]], 1); long long ans = 0; for(int i = 2; i < n; i++) { fw2.update(mp[h[i]], -1); ans += 1ll * fw1.query(mp[h[i]] - 1) * fw2.query(mp[h[i]] - 1); fw1.update(mp[h[i]], 1); } cout << ans; return 0; }
Compilation message
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 0 ms | 204 KB | Output is correct |
2 | Correct | 323 ms | 31456 KB | Output is correct |
3 | Correct | 311 ms | 31344 KB | Output is correct |
4 | Correct | 311 ms | 31212 KB | Output is correct |
5 | Correct | 317 ms | 31340 KB | Output is correct |
6 | Correct | 293 ms | 31340 KB | Output is correct |
7 | Correct | 309 ms | 31412 KB | Output is correct |
8 | Correct | 336 ms | 31352 KB | Output is correct |
9 | Correct | 158 ms | 17484 KB | Output is correct |
10 | Correct | 181 ms | 17444 KB | Output is correct |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 44 ms | 2752 KB | Output is correct |
2 | Correct | 44 ms | 2748 KB | Output is correct |
3 | Correct | 44 ms | 2708 KB | Output is correct |
4 | Correct | 47 ms | 2764 KB | Output is correct |
5 | Correct | 43 ms | 2712 KB | Output is correct |
6 | Correct | 47 ms | 2716 KB | Output is correct |
7 | Correct | 43 ms | 2704 KB | Output is correct |
8 | Correct | 43 ms | 2656 KB | Output is correct |
9 | Correct | 37 ms | 2720 KB | Output is correct |
10 | Correct | 0 ms | 204 KB | Output is correct |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 44 ms | 2752 KB | Output is correct |
2 | Correct | 44 ms | 2748 KB | Output is correct |
3 | Correct | 44 ms | 2708 KB | Output is correct |
4 | Correct | 47 ms | 2764 KB | Output is correct |
5 | Correct | 43 ms | 2712 KB | Output is correct |
6 | Correct | 47 ms | 2716 KB | Output is correct |
7 | Correct | 43 ms | 2704 KB | Output is correct |
8 | Correct | 43 ms | 2656 KB | Output is correct |
9 | Correct | 37 ms | 2720 KB | Output is correct |
10 | Correct | 0 ms | 204 KB | Output is correct |
11 | Incorrect | 54 ms | 2760 KB | Output isn't correct |
12 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Incorrect | 1 ms | 332 KB | Output isn't correct |
2 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Incorrect | 1 ms | 332 KB | Output isn't correct |
2 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 44 ms | 2752 KB | Output is correct |
2 | Correct | 44 ms | 2748 KB | Output is correct |
3 | Correct | 44 ms | 2708 KB | Output is correct |
4 | Correct | 47 ms | 2764 KB | Output is correct |
5 | Correct | 43 ms | 2712 KB | Output is correct |
6 | Correct | 47 ms | 2716 KB | Output is correct |
7 | Correct | 43 ms | 2704 KB | Output is correct |
8 | Correct | 43 ms | 2656 KB | Output is correct |
9 | Correct | 37 ms | 2720 KB | Output is correct |
10 | Correct | 0 ms | 204 KB | Output is correct |
11 | Incorrect | 54 ms | 2760 KB | Output isn't correct |
12 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 0 ms | 204 KB | Output is correct |
2 | Correct | 323 ms | 31456 KB | Output is correct |
3 | Correct | 311 ms | 31344 KB | Output is correct |
4 | Correct | 311 ms | 31212 KB | Output is correct |
5 | Correct | 317 ms | 31340 KB | Output is correct |
6 | Correct | 293 ms | 31340 KB | Output is correct |
7 | Correct | 309 ms | 31412 KB | Output is correct |
8 | Correct | 336 ms | 31352 KB | Output is correct |
9 | Correct | 158 ms | 17484 KB | Output is correct |
10 | Correct | 181 ms | 17444 KB | Output is correct |
11 | Correct | 44 ms | 2752 KB | Output is correct |
12 | Correct | 44 ms | 2748 KB | Output is correct |
13 | Correct | 44 ms | 2708 KB | Output is correct |
14 | Correct | 47 ms | 2764 KB | Output is correct |
15 | Correct | 43 ms | 2712 KB | Output is correct |
16 | Correct | 47 ms | 2716 KB | Output is correct |
17 | Correct | 43 ms | 2704 KB | Output is correct |
18 | Correct | 43 ms | 2656 KB | Output is correct |
19 | Correct | 37 ms | 2720 KB | Output is correct |
20 | Correct | 0 ms | 204 KB | Output is correct |
21 | Incorrect | 54 ms | 2760 KB | Output isn't correct |
22 | Halted | 0 ms | 0 KB | - |