Ruudukko

#include <iostream>
#include <vector>
#include <unordered_set>
#include <set>
using namespace std;

const int DIVISOR = 1000000007;
vector<int> line_row(1000);
vector<int> line_row_last(1000);
vector<int> line_col(1000);
vector<int> line_col_last(1000);
vector<int> line_row_added(1000);
vector<int> line_col_added(1000);
int total = 0;
struct hashFunction
{
    size_t operator()(const tuple<int, int, int> &x) const
    {
        return get<0>(x) ^ get<1>(x) ^ get<2>(x);
    }
};

int get_line_row(int y, int v)
{
    if (v == line_row_last[y])
    {
        return line_row[y];
    }
    line_row_last[y] = v;
    int s;
    s = (line_row[y] + line_row_added[y]) % DIVISOR;
    line_row_added[y] = 0;
    line_row[y] = s;

    return s;
}
int get_line_col(int x, int v)
{
    if (v == line_col_last[x])
    {
        return line_col[x];
    }
    line_col_last[x] = v;
    int s;
    s = (line_col[x] + line_col_added[x]) % DIVISOR;
    line_col_added[x] = 0;
    line_col[x] = s;

    return s;
}

int calculate_routes(int y, int x, int number)
{
    int value;
    if (number == 1)
    {
        value = 1;
    }
    else
    {
        value = (get_line_col(x, number) + get_line_row(y, number) + 1) % DIVISOR;
    }
    total += value;
    total %= DIVISOR;
    line_row_added[y] += value;
    line_row_added[y] %= DIVISOR;
    line_col_added[x] += value;
    line_col_added[x] %= DIVISOR;
    return value;
}

int main()
{
    int n;
    cin >> n;
    vector<int> grid;
    grid.reserve(n * n);
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
        {
            int a;
            cin >> a;
            grid.push_back(a);
        }
    }

    vector<int> line_row(n, 0);
    vector<int> line_row_last(n, 1);
    vector<int> line_col(n, 0);
    vector<int> line_col_last(n, 1);
    vector<int> line_row_added(n, 0);
    vector<int> line_col_added(n, 0);

    // vector<unordered_set<int>> exists_row;
    // set<int> exists_all;
    unordered_set<tuple<int, int, int>, hashFunction> values_coords;
    values_coords.reserve(n * n);
    for (int y = 0; y < n; y++)
    {
        // unordered_set<int> s;
        for (int x = 0; x < n; x++)
        {
            values_coords.insert(make_tuple(grid[y * n + x], x, y));
        }
    }
    set<tuple<int, int, int>> order(values_coords.begin(), values_coords.end());
    set<tuple<int, int, int>>::iterator itr;
    for (itr = order.begin(); itr != order.end(); itr++)
    {
        calculate_routes(get<2>(*itr), get<1>(*itr), get<0>(*itr));
    }
    cout << total << "\n";

    return 0;
}

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