Ruudukko

#include <bits/stdc++.h>
#define M 1000000007;
using namespace std;

int d = 0;

int vals[1000][1000];
int chains[1000][1000];
int totalChains = 0;
vector<pair<int, pair<int, int>>> orderTiles;


int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    
    //ifstream f("file.txt");
    
    cin >> d;
    //auto start = chrono::system_clock::now();
    
    for (int i = 0; i < d; i++) {
        for (int j = 0; j < d; j++) {
            cin >> vals[i][j];
            orderTiles.push_back({vals[i][j], {i, j}});
        }
    }
    
    //auto stop1 = chrono::system_clock::now();
    //chrono::duration<double> time1 = stop1 - start;
    //cout << "\nmidtime: " << time1.count() << "\n";
    
    sort(orderTiles.begin(), orderTiles.end());
    pair<int, pair<int, int>> p;
    int chainsFromThis;
    
    for (int i = 0; i < d * d; i++) {
        chainsFromThis = 1;
        p = orderTiles[i];
        
        for (int j = 0; j < d; j++) {
            if (p.first > vals[j][p.second.second]) chainsFromThis = (chainsFromThis + chains[j][p.second.second]) % M;
            if (p.first > vals[p.second.first][j]) chainsFromThis = (chainsFromThis + chains[p.second.first][j]) % M;
            
        }
        
        chains[p.second.first][p.second.second] = chainsFromThis;
        totalChains = (totalChains + chainsFromThis) % M;
    }
    
    /*for (int i = 0; i < d; i++) {
        cout << '\n';
        for (int j = 0; j < d; j++) {
            cout << chains[i][j] << ' ';
        }
    }*/
    
    cout << totalChains;
    //auto stop2 = chrono::system_clock::now();
    //chrono::duration<double> time2 = stop2 - start;
    //cout << "\ntime: " << time2.count();
}

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

Test 4

Group: 2, 3

Verdict: ACCEPTED

Test 5

Group: 2, 3

Verdict: ACCEPTED

Test 6

Group: 2, 3

Verdict: ACCEPTED

Test 7

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 8

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 9

Group: 3

Verdict: TIME LIMIT EXCEEDED