Submission #1161579

#	Time	Username	Problem	Language	Result	Execution time	Memory
1161579		antonn	Diversity (CEOI21_diversity)	C++20	0 / 100	0 ms	324 KiB

diversity

#include <bits/stdc++.h>

#define F first
#define S second
 
using namespace std;
using ll = long long;
using pi = pair<int, int>;
using vi = vector<int>;
 
template<class T> bool ckmin(T& a, T b) { return b < a ? a = b, true : false; }
template<class T> bool ckmax(T& a, T b) { return a < b ? a = b, true : false; }

const int N = 3e5 + 7;

int a[N];

int main() {
    ios::sync_with_stdio(0); cin.tie(0);
    
    int n, q; cin >> n >> q;
    for (int i = 1; i <= n; ++i) cin >> a[i];
    
    for (int i = 1; i <= q; ++i) {
        int l, r; cin >> l >> r;
        vector<int> v;
        for (int j = l; j <= r; ++j) v.push_back(a[j]);
        sort(v.begin(), v.end());
        
        int len = r - l + 1;
        ll ans = (ll) len * (len + 1) / 2;
        for (int j = 1; j < v.size(); ++j) {
            if (v[j] != v[j - 1]) {
                ans += (ll) j * (len - j);
            }
        }
        cout << ans << "\n";
    }
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 10
• Subtask 3: 0 / 8
• Subtask 4: 0 / 16
• Subtask 5: 0 / 26
• Subtask 6: 0 / 36