Submission #1164822

#	Time	Username	Problem	Language	Result	Execution time	Memory
1164822		King87arshia	Izbori (COCI22_izbori)	C++17	25 / 110	3095 ms	9032 KiB

Main

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

typedef tree<pair<int, int>, null_type, less<pair<int, int>>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;

#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx2")

const int N = 200005;
vector<int> big;
int ans = 0, n, a[N];
map<int, int> mp;
map<int, bool> mark;

int main() {
    scanf("%d", &n);
    for (int i = 0; i < n; i++) {
        scanf("%d", &a[i]);
        mp[a[i]]++;
    }
    int T = sqrt(n);
    for (auto &[x, y] : mp) {
        if (y >= T) big.push_back(x);
        else mark[x] = true;
    }
    for (int x : big) {
        ordered_set s;
        int sum = 0;
        s.insert({0, -1});
        for (int i = 0; i < n; i++) {
            sum += (a[i] == x ? 1 : -1);
            ans += s.order_of_key({sum, INT_MIN});
            s.insert({sum, i});
        }
    }
    for (int i = 0; i < n; i++) {
        map<int, int> freq;
        int maxFreq = 0, majorityElement = 0;
        for (int j = i; j < n; j++) {
            freq[a[j]]++;
            if (freq[a[j]] > maxFreq) {
                maxFreq = freq[a[j]];
                majorityElement = a[j];
            }
            if (maxFreq > (j - i + 1) / 2 && mark[majorityElement]) {
                ans++;
            }
        }
    }
    printf("%d\n", ans);
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:20:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
Main.cpp:22:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         scanf("%d", &a[i]);
      |         ~~~~~^~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 0 / 15
• Subtask 4: 0 / 70