Ruudukko

input/code.cpp: In function 'int main()':
input/code.cpp:51:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |         for (int j = 0; j < v.size(); j++) {
      |                         ~~^~~~~~~~~~

#include <bits/stdc++.h>

using namespace std;

int d = 0;
int m = 1000000007;

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

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    
    cin >> d;
    
    for (int i = 0; i < d; i++) {
        for (int j = 0; j < d; j++) {
            cin >> vals[i][j];
            chains[i][j] = 0;
            orderTiles.insert({vals[i][j], {i, j}});
        }
    }
    
    for (int i = 0; i < d; i++) {
        for (int j = 0; j < d; j++) {
            for (int i_2 = i + 1; i_2 < d; i_2++) {
                if (vals[i_2][j] < vals[i][j]) links[i][j].push_back({i_2, j});
                else if (vals[i_2][j] > vals[i][j]) links[i_2][j].push_back({i, j});
            }
            for (int j_2 = j + 1; j_2 < d; j_2++) {
                if (vals[i][j_2] < vals[i][j]) links[i][j].push_back({i, j_2});
                else if (vals[i][j_2] > vals[i][j]) links[i][j_2].push_back({i, j});
            }
        }
    }
    
    auto a = orderTiles.begin();
    pair<int, pair<int, int>> p;
    vector<pair<int, int>> v;
    int chainsFromThis;
    
    for (int i = 0; i < d * d; i++) {
        chainsFromThis = 1;
        p = *a;
        v = links[p.second.first][p.second.second];
        
        for (int j = 0; j < v.size(); j++) {
            chainsFromThis = (chainsFromThis + chains[v[j].first][v[j].second]) % m;
        }
        
        chains[p.second.first][p.second.second] = chainsFromThis;
        totalChains = (totalChains + chainsFromThis) % m;
        a++;
    }
    
    cout << totalChains;
}

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