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답안 #533503

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
533503 2022-03-06T08:18:00 Z kartel Izbori (COCI22_izbori) C++14
40 / 110
 3000 ms 16128 KB 
#include <bits/stdc++.h>
#define all(x) (x).begin(), (x).end()
#define F first
#define S second
#define pb push_back
#define sz(x) (int)x.size()
using namespace std;
typedef long long ll;

const int N = 2e5 + 500;
const int SQ = 500;

int t[N];
vector <int> vl, vals;
int pf[N], a[N], n;
vector <int> ps1[N], ps2[N];
ll ans = 0;

void upd(int v, int val) {for (; v < N; v = (v | (v + 1))) t[v] += val;}
int get(int v) {int ret = 0; for (; v >= 0; v = (v & (v + 1)) - 1) ret += t[v]; return ret;}

void calc_big(int x) {
    vl.clear();
    for (int i = 1; i <= n; i++) {
        pf[i] = pf[i - 1] + (x == a[i]);
        vl.pb(2 * pf[i - 1] - i + 1);
    }
    sort(all(vl));
    vl.resize(unique(all(vl)) - vl.begin());

    for (int i = 1; i <= n; i++) {
        upd(lower_bound(all(vl), 2 * pf[i - 1] - i + 1) - vl.begin(), 1);
        ans += get(lower_bound(all(vl), 2 * pf[i] - i) - vl.begin() - 1);
    }
    for (int i = 1; i <= n; i++) {
        upd(lower_bound(all(vl), 2 * pf[i - 1] - i + 1) - vl.begin(), -1);
    }
}

void calc_small(int x) {
    for (int i = 1; i < sz(ps1[x]); i++) {
        for (int j = i - 1; j < sz(ps2[x]) - 1; j++) {
            int cnt = (j + 1) - i + 1;
            int mx_len = min(ps2[x][j + 1] - ps1[x][i - 1] - 1, 2 * cnt - 1);
            for (int len = ps2[x][j] - ps1[x][i] + 1; len <= mx_len; len++) {
                ans += max(0, min(ps1[x][i], min(ps1[x][i] + len - 1, ps2[x][j + 1] - 1) - len + 1) - max(ps2[x][j] - len + 1, ps1[x][i - 1] + 1)) + 1;
            }
        }
    }
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(NULL);

    cin >> n;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
        vals.pb(a[i]);
    }

    sort(all(vals));
    vals.resize(unique(all(vals)) - vals.begin());

    for (int i = 1; i <= n; i++){
        a[i] = lower_bound(all(vals), a[i]) - vals.begin();
        ps1[a[i]].pb(i);
        ps2[a[i]].pb(i);
    }

    for (int x = 0; x < sz(vals); x++) {
        ps1[x].pb(0);
        ps2[x].pb(n + 1);
        sort(all(ps1[x]));
        if (x < SQ && sz(vals) > 2) {
            calc_small(x);
        } else {
            calc_big(x);
        }
    }
    cout << ans;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9676 KB Output is correct
2 Correct 5 ms 9676 KB Output is correct
3 Correct 5 ms 9676 KB Output is correct
4 Correct 5 ms 9676 KB Output is correct
5 Correct 5 ms 9676 KB Output is correct
6 Correct 5 ms 9676 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9676 KB Output is correct
2 Correct 5 ms 9676 KB Output is correct
3 Correct 5 ms 9676 KB Output is correct
4 Correct 5 ms 9676 KB Output is correct
5 Correct 5 ms 9676 KB Output is correct
6 Correct 5 ms 9676 KB Output is correct
7 Correct 64 ms 9828 KB Output is correct
8 Correct 5 ms 9676 KB Output is correct
9 Correct 6 ms 9764 KB Output is correct
10 Correct 6 ms 9676 KB Output is correct
11 Correct 6 ms 9676 KB Output is correct
12 Correct 5 ms 9676 KB Output is correct
13 Correct 6 ms 9676 KB Output is correct
14 Correct 5 ms 9676 KB Output is correct
15 Correct 5 ms 9676 KB Output is correct
16 Correct 7 ms 9676 KB Output is correct
17 Correct 6 ms 9932 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 54 ms 14280 KB Output is correct
2 Correct 68 ms 15284 KB Output is correct
3 Correct 42 ms 12764 KB Output is correct
4 Correct 72 ms 15472 KB Output is correct
5 Correct 75 ms 15836 KB Output is correct
6 Correct 84 ms 16072 KB Output is correct
7 Correct 79 ms 16060 KB Output is correct
8 Correct 79 ms 16128 KB Output is correct
9 Correct 84 ms 15816 KB Output is correct
10 Correct 78 ms 15808 KB Output is correct
11 Correct 76 ms 15260 KB Output is correct

Subtask #4
0 / 70.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9676 KB Output is correct
2 Correct 5 ms 9676 KB Output is correct
3 Correct 5 ms 9676 KB Output is correct
4 Correct 5 ms 9676 KB Output is correct
5 Correct 5 ms 9676 KB Output is correct
6 Correct 5 ms 9676 KB Output is correct
7 Correct 64 ms 9828 KB Output is correct
8 Correct 5 ms 9676 KB Output is correct
9 Correct 6 ms 9764 KB Output is correct
10 Correct 6 ms 9676 KB Output is correct
11 Correct 6 ms 9676 KB Output is correct
12 Correct 5 ms 9676 KB Output is correct
13 Correct 6 ms 9676 KB Output is correct
14 Correct 5 ms 9676 KB Output is correct
15 Correct 5 ms 9676 KB Output is correct
16 Correct 7 ms 9676 KB Output is correct
17 Correct 6 ms 9932 KB Output is correct
18 Correct 54 ms 14280 KB Output is correct
19 Correct 68 ms 15284 KB Output is correct
20 Correct 42 ms 12764 KB Output is correct
21 Correct 72 ms 15472 KB Output is correct
22 Correct 75 ms 15836 KB Output is correct
23 Correct 84 ms 16072 KB Output is correct
24 Correct 79 ms 16060 KB Output is correct
25 Correct 79 ms 16128 KB Output is correct
26 Correct 84 ms 15816 KB Output is correct
27 Correct 78 ms 15808 KB Output is correct
28 Correct 76 ms 15260 KB Output is correct
29 Correct 84 ms 15348 KB Output is correct
30 Execution timed out 3093 ms 12788 KB Time limit exceeded
31 Halted 0 ms 0 KB -