Illuminati

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

typedef unsigned long long ull;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    
    int n;
    cin >> n;
    int word_cnt = (n + 63) / 64;
    vector<ull> adj(n * word_cnt, 0ULL);
    
    for(int i=0; i<n; i++){
        string s;
        cin >> s;
        for(int j=0; j<n; j++){
            if(s[j] == '1'){
                int w = j /64;
                int b = j %64;
                adj[i * word_cnt + w] |= (1ULL << b);
            }
        }
    }
    
    unsigned long long count =0;
    for(int u=0; u<n; u++){
        int word_u = u /64;
        int bit_u = u %64;
        for(int w_idx = word_u; w_idx < word_cnt; w_idx++){
            ull mask;
            if(w_idx == word_u){
                mask = (~0ULL) << (bit_u +1);
            }
            else{
                mask = ~0ULL;
            }
            if(w_idx == word_cnt -1 && (n %64)!=0){
                mask &= (n %64) ? ((1ULL << (n %64)) -1) : ~0ULL;
            }
            ull w = adj[u * word_cnt + w_idx] & mask;
            while(w){
                ull lsb = w & -w;
                int pos = __builtin_ctzll(w);
                int v = w_idx *64 + pos;
                if(v >=n) break;
                unsigned int tmp_count =0;
                for(int m=0; m<word_cnt; m++){
                    tmp_count += __builtin_popcountll(adj[u * word_cnt +m] & adj[v * word_cnt +m]);
                }
                count += tmp_count;
                w ^= lsb;
            }
        }
    }
    cout << (count /3) << "\n";
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED

Test 18

Verdict: ACCEPTED

Test 19

Verdict: ACCEPTED

Test 20

Verdict: ACCEPTED

Test 21

Verdict: ACCEPTED

Test 22

Verdict: ACCEPTED

Test 23

Verdict: ACCEPTED

Test 24

Verdict: ACCEPTED

Test 25

Verdict: ACCEPTED

Test 26

Verdict: ACCEPTED

Test 27

Verdict: ACCEPTED

Test 28

Verdict: ACCEPTED

Test 29

Verdict: ACCEPTED

Test 30

Verdict: ACCEPTED

Test 31

Verdict: ACCEPTED

Test 32

Verdict: ACCEPTED

Test 33

Verdict: ACCEPTED

Test 34

Verdict: ACCEPTED

Test 35

Verdict: ACCEPTED

Test 36

Verdict: ACCEPTED

Test 37

Verdict: ACCEPTED

Test 38

Verdict: WRONG ANSWER

Test 39

Verdict: WRONG ANSWER

Test 40

Verdict: WRONG ANSWER

Test 41

Verdict: WRONG ANSWER

Test 42

Verdict: WRONG ANSWER

Test 43

Verdict: WRONG ANSWER

Test 44

Verdict: WRONG ANSWER

Test 45

Verdict: WRONG ANSWER

Test 46

Verdict: WRONG ANSWER

Test 47

Verdict: WRONG ANSWER

Test 48

Verdict: WRONG ANSWER

Test 49

Verdict: WRONG ANSWER

Test 50

Verdict: WRONG ANSWER

Test 51

Verdict: WRONG ANSWER

Test 52

Verdict: WRONG ANSWER

Test 53

Verdict: WRONG ANSWER