oj.uz

Submission #766284

# Submission time Handle Problem Language Result Execution time Memory
766284 2023-06-25T12:49:04 Z abysmal Sandcastle 2 (JOI22_ho_t5) C++14
80 / 100
 5000 ms 34508 KB 
#include<iostream>
#include<stdio.h>
#include<stdint.h>
#include<iomanip>
#include<algorithm>
#include<utility>
#include<vector>
#include<stack>
#include<queue>
#include<set>
#include<map>
#include<deque>
#include<math.h>
#include<assert.h>

using namespace std;

const int64_t INF = (int64_t) 2 * 1e9 + 100;
const int64_t mINF = (int64_t) 1e9 + 5;
const int64_t MOD = 1e9 + 7;
const int nbit = 31;
const int nchar = 26;
const int D = 4;
int dr[D] = {-1, 0, 1, 0};
int dc[D] = {0, 1, 0, -1};

struct Cell
{
    int r;
    int c;

    Cell(int r_, int c_) : r(r_), c(c_) {}
};

struct Solution
{
    int n;
    int m;
    int nmask;
    vector<int> pow;
    vector<vector<int> > g;
    vector<vector<vector<int> > > a;
    vector<vector<vector<int> > > prefix;
    Solution() {}

    void solve()
    {
        cin >> n >> m;

        if(n > m)
        {
            g.resize(m, vector<int>(n, 0));
            for(int i = 0; i < n; i++)
            {
                for(int j = 0; j < m; j++)
                {
                    cin >> g[j][i];
                }
            }

            swap(n, m);
        }
        else
        {
            g.resize(n, vector<int>(m, 0));
            for(int i = 0; i < n; i++)
            {
                for(int j = 0; j < m; j++)
                {
                    cin >> g[i][j];
                }
            }
        }

        if(n == 1) Sub1();
        else Sub4();
    }

    void Sub1()
    {
        int t = 0;
        int cnt = 1;
        int64_t ans = 0;
        for(int i = 1; i < m; i++)
        {
            int x = 1;
            if(g[0][i] < g[0][i - 1]) x = -1;
            if(t != x && t != 0)
            {
                ans += 1LL * cnt * (cnt - 1) / 2;
                cnt = 1;
            }

            cnt++;
            t = x;
        }

        ans += 1LL * cnt * (cnt - 1) / 2;
        cout << ans + m << "\n";
    }

    void Sub4()
    {
        int k = 3;
        nmask = 81;
        pow.resize(k + 1, 1);
        for(int i = 1; i <= k; i++)
        {
            pow[i] = pow[i - 1] * 3;
        }

        a.resize(nmask, vector<vector<int> >(n + 1, vector<int>(m + 1, 0)));
        for(int mask = 0; mask < nmask; mask++)
        {
            vector<int> c;
            int tmp = mask;
            for(int i = k; i >= 0; i--)
            {
                int d = tmp / pow[i];
                tmp %= pow[i];

                c.push_back(d);
            }
            reverse(c.begin(), c.end());
            for(int i = 0; i < n; i++)
            {
                for(int j = 0; j < m; j++)
                {
                    if(!check(c, i, j)) continue;

                    int cnt = 0;
                    for(int t = 0; t < D; t++)
                    {
                        if(c[t] == 0) continue;

                        Cell v(i + dr[t], j + dc[t]);
                        if(g[v.r][v.c] < g[i][j]) continue;

                        int max_ = g[i][j];
                        if(c[t] == 2)
                        {
                            int val = g[v.r + dr[t]][v.c + dc[t]];
                            if(val < g[v.r][v.c]) max_ = max(max_, val);
                        }

                        int nx = t + 1; if(nx == D) nx -= D;
                        int pr = t - 1; if(pr < 0) pr += D;
                        if(c[nx] != 0)
                        {
                            int val = g[v.r + dr[nx]][v.c + dc[nx]];
                            if(val < g[v.r][v.c]) max_ = max(max_, val);
                        }
                        if(c[pr] != 0)
                        {
                            int val = g[v.r + dr[pr]][v.c + dc[pr]];
                            if(val < g[v.r][v.c]) max_ = max(max_, val);
                        }

                        if(max_ == g[i][j]) cnt++;
                    }

                    if(cnt == 0) a[mask][i][j]++;
                }
            }
        }

        prefix.resize(nmask, vector<vector<int> >(n + 1, vector<int>(m + 1, 0)));
        for(int mask = 0; mask < nmask; mask++)
        {
            for(int i = 1; i <= n; i++)
            {
                for(int j = 1; j <= m; j++)
                {
                    prefix[mask][i][j] -= prefix[mask][i - 1][j - 1];
                    prefix[mask][i][j] += a[mask][i - 1][j - 1] + prefix[mask][i - 1][j] + prefix[mask][i][j - 1];
                }
            }
        }

        int64_t ans = 0;
        for(int i = 0; i < n; i++)
        {
            for(int r = i; r < n; r++)
            {
                for(int j = 0; j < m; j++)
                {
                    for(int c = j; c <= min(j + k, m - 1); c++)
                    {
                        int sum = Count(i, j, r, c);

                        if(sum == 1) ans++;
                    }
                }

                int mid = 0;
                map<int, int> mp;
                for(int j = 3; j < m; j++)
                {
                    int right = CalcRight(i, r, j);
                    mid += CalcMid(i, r, j - 2);
                    int left = CalcLeft(i, r, j - 2);

                    if(mp.count(right + mid - 1)) ans += mp[right + mid - 1];
                    mp[-left + mid]++;
                }
            }
        }

        cout << ans << "\n";
    }

    int CalcRight(int i, int r, int j)
    {
        int lx = i;
        int rx = r;
        int sum = 0;
        while(lx <= rx)
        {
            int t1 = getMask(i, j - 3, r, j, lx, j);
            int t2 = getMask(i, j - 3, r, j, lx, j - 1);
            int t3 = getMask(i, j - 3, r, j, rx, j);
            int t4 = getMask(i, j - 3, r, j, rx, j - 1);
            if(t1 == t3) sum += prefix[t1][rx + 1][j + 1] - prefix[t1][rx + 1][j] - prefix[t1][lx][j + 1] + prefix[t1][lx][j];
            else sum += a[t1][lx][j] + a[t3][rx][j];
            if(t2 == t4)
            {
                sum += prefix[t2][rx + 1][j] - prefix[t2][rx + 1][j - 1] - prefix[t2][lx][j] + prefix[t2][lx][j - 1];
                break;
            }
            else sum += a[t2][lx][j - 1] + a[t4][rx][j - 1];

            lx++; rx--;
        }

        return sum;
    }

    int CalcMid(int i, int r, int j)
    {
        int lx = i;
        int rx = r;
        int sum = 0;
        while(lx <= rx)
        {
            int t1 = getMask(i, j - 2, r, j + 2, lx, j);
            int t2 = getMask(i, j - 2, r, j + 2, rx, j);

            if(t1 == t2)
            {
                sum += prefix[t1][rx + 1][j + 1] - prefix[t1][rx + 1][j] - prefix[t1][lx][j + 1] + prefix[t1][lx][j];
                break;
            }
            else sum += a[t1][lx][j] + a[t2][rx][j];
            lx++; rx--;
        }

        return sum;
    }

    int CalcLeft(int i, int r, int j)
    {
        int lx = i;
        int rx = r;
        int sum = 0;
        while(lx <= rx)
        {
            int t1 = getMask(i, j - 1, r, j + 2, lx, j);
            int t2 = getMask(i, j - 1, r, j + 2, lx, j - 1);
            int t3 = getMask(i, j - 1, r, j + 2, rx, j);
            int t4 = getMask(i, j - 1, r, j + 2, rx, j - 1);

            if(t1 == t3) sum += prefix[t1][rx + 1][j + 1] - prefix[t1][rx + 1][j] - prefix[t1][lx][j + 1] + prefix[t1][lx][j];
            else sum += a[t1][lx][j] + a[t3][rx][j];

            if(t2 == t4)
            {
                sum += prefix[t2][rx + 1][j] - prefix[t2][rx + 1][j - 1] - prefix[t2][lx][j] + prefix[t2][lx][j - 1];
                break;
            }
            else sum += a[t2][lx][j - 1] + a[t4][rx][j - 1];

            lx++; rx--;
        }

        return sum;
    }

    int Count(int i, int j, int r, int c)
    {
        int lx = i;
        int rx = r;
        int sum = 0;
        while(lx <= rx)
        {
            int ly = j;
            int ry = c;

            while(ly <= ry)
            {
                int t1 = getMask(i, j, r, c, lx, ly);
                int t2 = getMask(i, j, r, c, lx, ry);
                int t3 = getMask(i, j, r, c, rx, ly);
                int t4 = getMask(i, j, r, c, rx, ry);
                if(t3 == t4 && lx != rx) sum += prefix[t3][rx + 1][ry + 1] - prefix[t3][rx + 1][ly] - prefix[t3][rx][ry + 1] + prefix[t3][rx][ly];
                else if(t3 != t4 && lx != rx) sum += a[t3][rx][ly] + a[t4][rx][ry];

                if(t1 == t2)
                {
                    sum += prefix[t1][lx + 1][ry + 1] - prefix[t1][lx + 1][ly] - prefix[t2][lx][ry + 1] + prefix[t2][lx][ly];
                    break;
                }
                else if(t1 != t2) sum += a[t1][lx][ly] + a[t2][lx][ry];
                ly++; ry--;
            }

            lx++; rx--;
        }

        return sum;
    }

    int getMask(int i, int j, int r, int c, int x, int y)
    {
        int u = min(x - i, 2); int d = min(r - x, 2);
        int l = min(y - j, 2); int rt = min(c - y, 2);
        return u * pow[0] + rt * pow[1] + d * pow[2] + l * pow[3];
    }

    bool check(vector<int>& p, int r, int c)
    {
        return 0 <= r - p[0] && r + p[2] < n &&
               0 <= c - p[3] && c + p[1] < m;
    }

    int modadd(int t1, int t2)
    {
        int res = t1 + t2;
        if(res >= MOD) res -= MOD;
        return res;
    }

    int modmul(int t1, int t2)
    {
        int64_t res = 1LL * t1 * t2;
        return res % MOD;
    }

    int Abs(int tmp)
    {
        if(tmp < 0) return -tmp;
        return tmp;
    }

    int64_t MASK(int j)
    {
        return (1LL << j);
    }

    bool BIT(int64_t tmp, int j)
    {
        return (tmp & MASK(j));
    }
};

void __setup()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

//    freopen("in.txt", "r", stdin);
//    freopen("out.txt", "w", stdout);
}

int main()
{
    __setup();

    int t = 1;
//    cin >> t;
    for(int i = 1; i <= t; i++)
    {
        Solution().solve();
    }
    return 0;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 328 KB Output is correct
2 Correct 4 ms 784 KB Output is correct
3 Correct 4 ms 892 KB Output is correct
4 Correct 4 ms 912 KB Output is correct
5 Correct 4 ms 896 KB Output is correct
6 Correct 4 ms 892 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 452 KB Output is correct
6 Correct 1 ms 340 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 452 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 328 KB Output is correct
8 Correct 1 ms 328 KB Output is correct
9 Correct 23 ms 1584 KB Output is correct
10 Correct 12 ms 1572 KB Output is correct
11 Correct 2 ms 1748 KB Output is correct
12 Correct 2 ms 1748 KB Output is correct
13 Correct 17 ms 1492 KB Output is correct
14 Correct 10 ms 1092 KB Output is correct
15 Correct 15 ms 1492 KB Output is correct
16 Correct 16 ms 1492 KB Output is correct

Subtask #4
56.0 / 56.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 452 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 328 KB Output is correct
8 Correct 1 ms 328 KB Output is correct
9 Correct 23 ms 1584 KB Output is correct
10 Correct 12 ms 1572 KB Output is correct
11 Correct 2 ms 1748 KB Output is correct
12 Correct 2 ms 1748 KB Output is correct
13 Correct 17 ms 1492 KB Output is correct
14 Correct 10 ms 1092 KB Output is correct
15 Correct 15 ms 1492 KB Output is correct
16 Correct 16 ms 1492 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 149 ms 5128 KB Output is correct
19 Correct 34 ms 5264 KB Output is correct
20 Correct 289 ms 5388 KB Output is correct
21 Correct 309 ms 5380 KB Output is correct
22 Correct 300 ms 5432 KB Output is correct
23 Correct 285 ms 5364 KB Output is correct
24 Correct 182 ms 4692 KB Output is correct
25 Correct 251 ms 5332 KB Output is correct
26 Correct 273 ms 5392 KB Output is correct
27 Correct 259 ms 5320 KB Output is correct
28 Correct 286 ms 5388 KB Output is correct

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 452 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 328 KB Output is correct
8 Correct 1 ms 328 KB Output is correct
9 Correct 23 ms 1584 KB Output is correct
10 Correct 12 ms 1572 KB Output is correct
11 Correct 2 ms 1748 KB Output is correct
12 Correct 2 ms 1748 KB Output is correct
13 Correct 17 ms 1492 KB Output is correct
14 Correct 10 ms 1092 KB Output is correct
15 Correct 15 ms 1492 KB Output is correct
16 Correct 16 ms 1492 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 149 ms 5128 KB Output is correct
19 Correct 34 ms 5264 KB Output is correct
20 Correct 289 ms 5388 KB Output is correct
21 Correct 309 ms 5380 KB Output is correct
22 Correct 300 ms 5432 KB Output is correct
23 Correct 285 ms 5364 KB Output is correct
24 Correct 182 ms 4692 KB Output is correct
25 Correct 251 ms 5332 KB Output is correct
26 Correct 273 ms 5392 KB Output is correct
27 Correct 259 ms 5320 KB Output is correct
28 Correct 286 ms 5388 KB Output is correct
29 Correct 4 ms 784 KB Output is correct
30 Correct 1161 ms 33812 KB Output is correct
31 Execution timed out 5027 ms 34508 KB Time limit exceeded
32 Halted 0 ms 0 KB -