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Submission #907482

# Submission time Handle Problem Language Result Execution time Memory
907482 2024-01-15T17:31:39 Z vjudge1 Izbori (COCI22_izbori) C++17
25 / 110
 162 ms 5712 KB 
#include<bits/stdc++.h>

using namespace std;


int n, a[200001], num = 0, cnt[200001], sz = 319, cnt2[200001], res = 0, c[200001], pfs[200001], dp[200001], sl[400001];
pair<int, int> b[200001];
vector<int> v;
bool check[200001];

bool cmp(pair<int, int> a, pair<int, int> b) {
    return a.second < b.second;
}

signed main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
        b[i].first = a[i];
        b[i].second = i;
    }
    int last = -1;
    sort(b + 1, b + 1 + n);
    for (int i = 1; i <= n; i++) {
        int l2 = b[i].first;
        if(b[i].first == last) b[i].first = num;
        else b[i].first = ++num;
        last = l2;
    }
    sort(b + 1, b + 1 + n, cmp);
    for (int i = 1; i <= n; i++) {
        a[i] = b[i].first;
        cnt[a[i]]++;
        if(cnt[a[i]] > sz && !check[a[i]]) {
            v.push_back(a[i]);
            check[a[i]] = true;
        }
    }
    for (int i = 1; i <= n; i++) {
        int mx = 1;
        for (int j = i; j <= min(i + 2 * sz - 1, n); j++) {
            num = j - i + 1;
            if(cnt[a[j]] <= sz) {
                cnt2[a[j]]++;
                mx = max(mx, cnt2[a[j]]);
                if(mx > num / 2) res++;
            }
        }
        for (int j = i; j <= min(i + 2 * sz - 1, n); j++) {
            if(cnt[a[j]] < sz) cnt2[a[j]]--;
        }
    }
    for (int i = 0; i < v.size(); i++) {
        int bnum = v[i];
        pfs[0] = n;
        sl[n] = 1;
        for (int j = 1; j <= n; j++) {
            if(a[j] == bnum) c[j] = 1;
            else c[j] = -1;
            pfs[j] = pfs[j - 1] + c[j];
            if(pfs[j] > pfs[j - 1]) {
                dp[j] = dp[j - 1] + sl[pfs[j - 1]];
            }
            else {
                dp[j] = dp[j - 1] - sl[pfs[j]];
            }
            sl[pfs[j]]++;
            res += dp[j];
        }
        for (int j = 1; j <= n; j++) {
            sl[pfs[j]] = 0;
            dp[j] = 0;
            pfs[j] = 0;
        }
    }
    cout << res << '\n';
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:54:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |     for (int i = 0; i < v.size(); i++) {
      |                     ~~^~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 2 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 3 ms 2396 KB Output is correct
10 Correct 3 ms 2396 KB Output is correct
11 Correct 3 ms 2396 KB Output is correct
12 Correct 3 ms 2396 KB Output is correct
13 Correct 3 ms 2396 KB Output is correct
14 Correct 3 ms 2396 KB Output is correct
15 Correct 3 ms 2396 KB Output is correct
16 Correct 3 ms 2520 KB Output is correct
17 Correct 3 ms 4444 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 162 ms 5712 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2392 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 2 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 3 ms 2396 KB Output is correct
10 Correct 3 ms 2396 KB Output is correct
11 Correct 3 ms 2396 KB Output is correct
12 Correct 3 ms 2396 KB Output is correct
13 Correct 3 ms 2396 KB Output is correct
14 Correct 3 ms 2396 KB Output is correct
15 Correct 3 ms 2396 KB Output is correct
16 Correct 3 ms 2520 KB Output is correct
17 Correct 3 ms 4444 KB Output is correct
18 Incorrect 162 ms 5712 KB Output isn't correct
19 Halted 0 ms 0 KB -