Submission #14,484

2025-01-11 21:40:12

cpp17

Accepted 100/100

108ms

7336 KiB

#include <iostream>
#include <vector>
#include <algorithm>
#include <map>
#include <cstdint>
using namespace std;
typedef int64_t ll;

int main() {
    ll n;
    cin >> n;
    map<ll,ll> mp;
    for(ll i = 0; i < n; i++) {
        ll tmp;
        cin >> tmp;
        mp[tmp]++;
    }

    /*
    for(const auto & x : mp) {
        cerr << "\nmp " << x.first << " = " << x.second; 
    }
    */

    ll a = 0, b = 0;
    for(auto it = mp.rbegin(); it != mp.rend(); it++) {
        auto x = *it;
        //cerr << "\nx=" << x.first;
        if(x.second < 2) {
            //cerr << "\nskipped";
            continue;
        }
        if(x.second >= 2 && x.second < 4) {
            if(a == 0) {
                a = x.first;
            }else{
                b = x.first;
                break;
            }
        }
        if(x.second >= 4) {
            if(a == 0) {
                a = x.first;
                b = x.first;
            }else{
                b = x.first;
            }
            break;
        }
    }
    cout << a * b;
}

	Sum	Test	Verdict	Time	Memory
subtask1	0/0
		1	Accepted	1ms	316 KiB
		2	Accepted	1ms	508 KiB
		3	Accepted	1ms	316 KiB
subtask2	10/10
		4	Accepted	1ms	316 KiB
		5	Accepted	1ms	316 KiB
		6	Accepted	1ms	316 KiB
		7	Accepted	1ms	316 KiB
		8	Accepted	1ms	316 KiB
subtask3	10/10
		9	Accepted	1ms	320 KiB
		10	Accepted	1ms	316 KiB
		11	Accepted	1ms	316 KiB
		12	Accepted	1ms	400 KiB
		13	Accepted	17ms	596 KiB
		14	Accepted	17ms	596 KiB
subtask4	15/15
		15	Accepted	1ms	316 KiB
		16	Accepted	1ms	316 KiB
		17	Accepted	1ms	512 KiB
		18	Accepted	1ms	512 KiB
		19	Accepted	1ms	404 KiB
		20	Accepted	1ms	316 KiB
		21	Accepted	1ms	316 KiB
		22	Accepted	1ms	316 KiB
		23	Accepted	1ms	316 KiB
		24	Accepted	1ms	316 KiB
subtask5	20/20
		25	Accepted	2ms	316 KiB
		26	Accepted	4ms	632 KiB
		27	Accepted	4ms	740 KiB
		28	Accepted	4ms	576 KiB
		29	Accepted	4ms	668 KiB
		30	Accepted	4ms	564 KiB
		31	Accepted	4ms	564 KiB
		32	Accepted	3ms	412 KiB
subtask6	15/15
		33	Accepted	1ms	316 KiB
		34	Accepted	65ms	5220 KiB
		35	Accepted	75ms	7172 KiB
		36	Accepted	79ms	7216 KiB
		37	Accepted	74ms	7160 KiB
		38	Accepted	71ms	7216 KiB
		39	Accepted	72ms	7272 KiB
		40	Accepted	4ms	316 KiB
		41	Accepted	48ms	1960 KiB
subtask7	30/30
		42	Accepted	41ms	944 KiB
		43	Accepted	86ms	7032 KiB
		44	Accepted	93ms	7220 KiB
		45	Accepted	103ms	7336 KiB
		46	Accepted	108ms	7112 KiB
		47	Accepted	87ms	7176 KiB
		48	Accepted	104ms	7220 KiB
		49	Accepted	92ms	7220 KiB
		50	Accepted	54ms	2112 KiB
		51	Accepted	59ms	2636 KiB