oj.uz

Submission #778944

# Submission time Handle Problem Language Result Execution time Memory
778944 2023-07-11T04:20:41 Z 이동현(#10002) PIN (CEOI10_pin) C++17
100 / 100
 187 ms 16300 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#define int long long
using namespace std;

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int n, d;
    cin >> n >> d;
    vector<map<string, int>> mp(16);
    vector<string> a(n);
    for(int i = 0; i < n; ++i){
        cin >> a[i];
        for(int j = 0; j < 16; ++j){
            string now;
            for(int k = 0; k < 4; ++k){
                if(j & (1 << k)){
                    now += a[i][k];
                }
            }
            ++mp[j][now];
        }
    }
    vector<int> sum(16);
    for(int i = 0; i < 16; ++i){
        for(auto&j:mp[i]){
            sum[i] += j.second * (j.second - 1) / 2;
        }
    }

    auto sol = [&](int x){
        vector<int> st;
        if(x == 4) st = {1, 2, 4, 8};
        else if(x == 3) st = {3, 5, 9, 6, 10, 12};
        else if(x == 2) st = {7, 11, 13, 14};
        else st = {15};

        int rv = n * (n - 1) / 2;
        int sz = (1 << (int)st.size());
        for(int i = 1; i < sz; ++i){
            int bt = 0;
            for(int j = 0; j < (int)st.size(); ++j){
                if(i & (1 << j)){
                    bt |= st[j];
                }
            }
            int op = (__builtin_popcount(i) % 2 ? -1 : 1);
            rv += op * sum[bt];
        }

        return rv;
    };

    cout << sol(d) - (d != 4 ? sol(d + 1) : 0) << '\n';
    
    return 0;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1108 KB Output is correct
2 Correct 4 ms 980 KB Output is correct
3 Correct 3 ms 852 KB Output is correct
4 Correct 42 ms 3904 KB Output is correct
5 Correct 52 ms 4544 KB Output is correct
6 Correct 51 ms 4524 KB Output is correct
7 Correct 47 ms 3952 KB Output is correct
8 Correct 56 ms 4856 KB Output is correct
9 Correct 96 ms 6792 KB Output is correct
10 Correct 109 ms 7284 KB Output is correct
11 Correct 56 ms 4684 KB Output is correct
12 Correct 121 ms 7004 KB Output is correct
13 Correct 68 ms 5108 KB Output is correct
14 Correct 57 ms 4748 KB Output is correct
15 Correct 98 ms 7064 KB Output is correct
16 Correct 119 ms 12236 KB Output is correct
17 Correct 187 ms 16300 KB Output is correct
18 Correct 144 ms 13424 KB Output is correct
19 Correct 167 ms 15028 KB Output is correct
20 Correct 183 ms 16252 KB Output is correct