oj.uz

답안 #1055736

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1055736 2024-08-13T04:38:39 Z manhlinh1501 Izbori (COCI22_izbori) C++17
110 / 110
 2379 ms 22444 KB 
#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
const int MAXN = 5e5 + 5;
const int BLOCK_SIZE = 475;
#define ALL(a) (a).begin(), (a).end()
#define LB(a, x) (lower_bound(ALL(a), x) - (a).begin() + 1)

int N;
int a[MAXN];
vector<int> pos[MAXN];
int prefix[MAXN];
int cnt[MAXN];

struct fenwick {
    int N;
    int tree[MAXN];

    void update(int x, int v) {
        for(; x < MAXN; x += (x & -x)) tree[x] += v;
    }

    int calc(int x) {
        int res = 0;
        for(; x; x -= (x & -x)) res += tree[x];
        return res;
    }
} BIT;

void compress() {
    vector<int> temp;
    for(int i = 1; i <= N; i++) temp.emplace_back(a[i]);
    sort(ALL(temp));
    temp.resize(unique(ALL(temp)) - temp.begin());
    for(int i = 1; i <= N; i++) a[i] = LB(temp, a[i]);
}

signed main() {
#define TASK "baucu"

    if (fopen(TASK ".inp", "r")) {
        freopen(TASK ".inp", "r", stdin);
        freopen(TASK ".out", "w", stdout);
    }

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin >> N;
    for(int i = 1; i <= N; i++) cin >> a[i];
    compress();
    for(int i = 1; i <= N; i++) pos[a[i]].emplace_back(i);
    i64 ans = 0;
    for(int i = 1; i <= N; i++) {
        int maxx = 0;
        for(int j = i; j <= min(N, i + 2 * BLOCK_SIZE - 1); j++) {
            if(pos[a[j]].size() <= BLOCK_SIZE) {
                cnt[a[j]]++;
                maxx = max(maxx, cnt[a[j]]);
            }
            if(maxx * 2 > (j - i + 1))
                ans++;
        }
        for(int j = i; j <= min(N, i + 2 * BLOCK_SIZE - 1); j++) {
            if(pos[a[j]].size() <= BLOCK_SIZE)
                cnt[a[j]]--;
        }
    }
    BIT.update(N + 1, 1);
    for(int i = 1; i <= N; i++) {
        if(pos[i].size() > BLOCK_SIZE) {
            for(int j = 1; j <= N; j++) prefix[j] = -1;
            for(int p : pos[i]) prefix[p] = 1;
            for(int j = 1; j <= N; j++) prefix[j] += prefix[j - 1];
            for(int j = 1; j <= N; j++) prefix[j] += (N + 1);
            for(int j = 1; j <= N; j++) {
                ans += BIT.calc(prefix[j] - 1);
                BIT.update(prefix[j], 1);
            }
            for(int j = 1; j <= N; j++) BIT.update(prefix[j], -1);
        }
    }
    cout << ans;
    return (0 ^ 0);
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:42:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |         freopen(TASK ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:43:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |         freopen(TASK ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 14684 KB Output is correct
2 Correct 2 ms 14680 KB Output is correct
3 Correct 2 ms 14680 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Correct 2 ms 14684 KB Output is correct
6 Correct 2 ms 14684 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 14684 KB Output is correct
2 Correct 2 ms 14680 KB Output is correct
3 Correct 2 ms 14680 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Correct 2 ms 14684 KB Output is correct
6 Correct 2 ms 14684 KB Output is correct
7 Correct 3 ms 14684 KB Output is correct
8 Correct 2 ms 14684 KB Output is correct
9 Correct 5 ms 14684 KB Output is correct
10 Correct 6 ms 14684 KB Output is correct
11 Correct 5 ms 14792 KB Output is correct
12 Correct 6 ms 14684 KB Output is correct
13 Correct 6 ms 14844 KB Output is correct
14 Correct 6 ms 14680 KB Output is correct
15 Correct 6 ms 14680 KB Output is correct
16 Correct 5 ms 14684 KB Output is correct
17 Correct 5 ms 18780 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 225 ms 20308 KB Output is correct
2 Correct 303 ms 20500 KB Output is correct
3 Correct 172 ms 19768 KB Output is correct
4 Correct 330 ms 20464 KB Output is correct
5 Correct 328 ms 20444 KB Output is correct
6 Correct 346 ms 20564 KB Output is correct
7 Correct 347 ms 20400 KB Output is correct
8 Correct 337 ms 20656 KB Output is correct
9 Correct 341 ms 20552 KB Output is correct
10 Correct 348 ms 20576 KB Output is correct
11 Correct 333 ms 21112 KB Output is correct

Subtask #4
70.0 / 70.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 14684 KB Output is correct
2 Correct 2 ms 14680 KB Output is correct
3 Correct 2 ms 14680 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Correct 2 ms 14684 KB Output is correct
6 Correct 2 ms 14684 KB Output is correct
7 Correct 3 ms 14684 KB Output is correct
8 Correct 2 ms 14684 KB Output is correct
9 Correct 5 ms 14684 KB Output is correct
10 Correct 6 ms 14684 KB Output is correct
11 Correct 5 ms 14792 KB Output is correct
12 Correct 6 ms 14684 KB Output is correct
13 Correct 6 ms 14844 KB Output is correct
14 Correct 6 ms 14680 KB Output is correct
15 Correct 6 ms 14680 KB Output is correct
16 Correct 5 ms 14684 KB Output is correct
17 Correct 5 ms 18780 KB Output is correct
18 Correct 225 ms 20308 KB Output is correct
19 Correct 303 ms 20500 KB Output is correct
20 Correct 172 ms 19768 KB Output is correct
21 Correct 330 ms 20464 KB Output is correct
22 Correct 328 ms 20444 KB Output is correct
23 Correct 346 ms 20564 KB Output is correct
24 Correct 347 ms 20400 KB Output is correct
25 Correct 337 ms 20656 KB Output is correct
26 Correct 341 ms 20552 KB Output is correct
27 Correct 348 ms 20576 KB Output is correct
28 Correct 333 ms 21112 KB Output is correct
29 Correct 348 ms 22444 KB Output is correct
30 Correct 112 ms 16196 KB Output is correct
31 Correct 240 ms 17556 KB Output is correct
32 Correct 647 ms 20200 KB Output is correct
33 Correct 252 ms 17552 KB Output is correct
34 Correct 266 ms 17792 KB Output is correct
35 Correct 182 ms 16900 KB Output is correct
36 Correct 110 ms 16120 KB Output is correct
37 Correct 126 ms 16192 KB Output is correct
38 Correct 361 ms 20568 KB Output is correct
39 Correct 363 ms 20472 KB Output is correct
40 Correct 377 ms 20400 KB Output is correct
41 Correct 358 ms 20656 KB Output is correct
42 Correct 375 ms 20396 KB Output is correct
43 Correct 394 ms 22196 KB Output is correct
44 Correct 395 ms 22188 KB Output is correct
45 Correct 391 ms 22088 KB Output is correct
46 Correct 425 ms 21936 KB Output is correct
47 Correct 395 ms 22192 KB Output is correct
48 Correct 1483 ms 20652 KB Output is correct
49 Correct 1495 ms 20664 KB Output is correct
50 Correct 786 ms 20912 KB Output is correct
51 Correct 841 ms 20928 KB Output is correct
52 Correct 386 ms 16600 KB Output is correct
53 Correct 2379 ms 20652 KB Output is correct
54 Correct 1428 ms 17592 KB Output is correct