Submission #598817

#	Time	Username	Problem	Language	Result	Execution time	Memory
598817		shrimb	Cards (LMIO19_korteles)	C++17	36 / 100	1104 ms	99876 KiB

korteles

#include"bits/stdc++.h"
using namespace std;

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

template<class x>
using ordered_set = tree<x, null_type,less_equal<x>, rb_tree_tag,tree_order_statistics_node_update>;

#define int long long
#define endl '\n'
#define mod 1000000007
//\
#define mod 1686876991

string Hash (char a, char b) {
	return ((string)"" + a) + b;
}

signed main () {
    cin.tie(0)->sync_with_stdio(0);
	int n;
	cin >> n;
	int ans = 0;
	unordered_map<string,int> mp[1<<4];
	for (int i = 0 ; i < n ; i++) {
		char a, b, c, d;
		cin >> a >> b >> c >> d;
		string H[4] = {Hash(a, b), Hash(b, d), Hash(c, d), Hash(a, c)};
		// U R D L
		vector<string> inc;

		string enc, ienc;
		int cnt = 0;
		int inv = 0;
		#define check(j,i,k) if (j & (1 << i)) { cnt++; enc += H[i]; inv |= (1 << k);}
		for (int j = 1 ; j < (1 << 4) ; j++) {
			enc.clear();
			ienc.clear();
			cnt = 0;
			inv = 0;
			check(j, 0, 2);
			check(j, 1, 3);
			check(j, 2, 0);
			check(j, 3, 1);
			for (int k = 0 ; k < 4 ; k++) {
				if (inv & (1 << k)) {
					ienc += H[(k + 2) % 4];
				}
			}
			if (cnt & 1) ans += mp[inv][ienc];
			else ans -= mp[inv][ienc];
			// cerr << enc << endl;
			inc.push_back(enc);
		}
		for (int j = 1 ; j < (1 << 4) ; j++) mp[j][inc[j - 1]]++;
	}
	cout << ans << endl;
}

Compilation message (stderr)

korteles.cpp:14:1: warning: multi-line comment [-Wcomment]
   14 | //\
      | ^

• Subtask 1: 16 / 16
• Subtask 2: 20 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 19
• Subtask 5: 0 / 25