oj.uz

답안 #446702

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
446702 2021-07-23T06:53:00 Z baluteshih Cultivation (JOI17_cultivation) C++14
30 / 100
 290 ms 976 KB 
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
#define X first
#define Y second
#define SZ(a) ((int)a.size())
#define ALL(v) v.begin(), v.end()
#define pb push_back

const int INF = 2e9;
pii arr[305];

int umx, dmx;
vector<pii> smx; // [l, INF)

int lmi_a = 0;
vector<pii> lmi_u, lmi_d; // [0, r)
vector<pair<pii, int>> lmi_m; // [l, r)

int rmi_a = 0;
vector<pii> rmi_u, rmi_d; // [0, r)
vector<pair<pii, int>> rmi_m; // [l, r)

int smi_a = 0;
vector<pii> smi_u, smi_d; // [0, r)
vector<pair<pii, int>> smi_m; // [l, r)

vector<int> L, M, R;
vector<int> val;

void modify(vector<int> &seg, int ql, int qr, int l, int r, int rt, int v) {
    if (ql <= l && qr >= r)
        return seg[rt] = max(seg[rt], v), void();
    int mid = (l + r) >> 1;
    if (ql <= mid)
        modify(seg, ql, qr, l, mid, rt << 1, v);
    if (qr > mid)
        modify(seg, ql, qr, mid + 1, r, rt << 1 | 1, v);
}

void modify(vector<int> &seg, int ql, int qr, int v) { //[ql, qr)
    if (ql < qr)
        modify(seg, ql, qr - 1, 0, SZ(val) - 1, 1, v);
}

void dfs(vector<int> &seg, int l, int r, int rt, int v, vector<int> &res) {
    v = max(v, seg[rt]);
    if (l == r)
        return res[l] = v, void();
    int mid = (l + r) >> 1;
    dfs(seg, l, mid, rt << 1, v, res);
    dfs(seg, mid + 1, r, rt << 1 | 1, v, res);
}

int main() {
    ios::sync_with_stdio(0), cin.tie(0);
    int r, c, n, ans;
    cin >> r >> c >> n, ans = r + c - 2;
    for (int i = 1; i <= n; ++i)
        cin >> arr[i].X >> arr[i].Y;
    sort(arr + 1, arr + n + 1, [](pii a, pii b){ return a.Y < b.Y; });
    lmi_a = arr[1].Y - 1;
    rmi_a = c - arr[n].Y;
    for (int i = 1, j = 1; i <= n; i = j) {
        while (j <= n && arr[i].Y == arr[j].Y)
            ++j;
        if (j <= n)
            smi_a = max(smi_a, arr[j].Y - arr[i].Y - 1);
    }
    smi_a = max(smi_a, lmi_a + rmi_a);
    sort(arr + 1, arr + n + 1);
    // U
    for (int i = 1; i <= n; ++i) {
        int lft = -1, rgt = INF;
        for (int j = 1; arr[j].X < arr[i].X; ++j) {
            if (arr[j].Y >= arr[i].Y)
                rgt = min(rgt, arr[j].Y);
            if (arr[j].Y <= arr[i].Y)
                lft = max(lft, arr[j].Y);
        }
        if (lft == -1 && rgt == INF)
            umx = max(umx, arr[i].X - 1);
        else if (lft == -1)
            lmi_u.pb(pii(rgt - 1, arr[i].X - 1));
        else if (rgt == INF)
            rmi_u.pb(pii(c - lft, arr[i].X - 1));
        else if (rgt - lft - 1 > 0)
            smi_u.pb(pii(rgt - lft - 1, arr[i].X - 1));
    }
            
    // M
    for (int i = 1; i <= n; ++i)
        for (int j = 1; arr[j].X < arr[i].X; ++j) {
            int lft = -1, rgt = INF;
            for (int k = j + 1; k < i; ++k) {
                if (arr[k].X == arr[j].X || arr[k].X == arr[i].X)
                    continue;
                if (arr[k].Y >= arr[i].Y || arr[k].Y >= arr[j].Y)
                    rgt = min(rgt, arr[k].Y);
                if (arr[k].Y <= arr[i].Y || arr[k].Y <= arr[j].Y)
                    lft = max(lft, arr[k].Y);
            }
            if (lft == -1 && rgt == INF)
                smx.pb(pii(abs(arr[i].Y - arr[j].Y), arr[i].X - arr[j].X - 1));
            else if (lft == -1)
                lmi_m.pb(make_pair(pii(abs(arr[i].Y - arr[j].Y), rgt - 1), arr[i].X - arr[j].X - 1));
            else if (rgt == INF)
                rmi_m.pb(make_pair(pii(abs(arr[i].Y - arr[j].Y), c - lft), arr[i].X - arr[j].X - 1));
            else if (rgt - lft - 1 > abs(arr[i].Y - arr[i].Y))
                smi_m.pb(make_pair(pii(abs(arr[i].Y - arr[j].Y), rgt - lft - 1), arr[i].X - arr[j].X - 1));
        }

    // D
    for (int i = 1; i <= n; ++i) {
        int lft = -1, rgt = INF;
        for (int j = n; arr[j].X > arr[i].X; --j) {
            if (arr[j].Y >= arr[i].Y)
                rgt = min(rgt, arr[j].Y);
            if (arr[j].Y <= arr[i].Y)
                lft = max(lft, arr[j].Y);
        }
        if (lft == -1 && rgt == INF)
            dmx = max(dmx, r - arr[i].X);
        else if (lft == -1)
            lmi_d.pb(pii(rgt - 1, r - arr[i].X));
        else if (rgt == INF)
            rmi_d.pb(pii(c - lft, r - arr[i].X));
        else if (rgt - lft - 1 > 0)
            smi_d.pb(pii(rgt - lft - 1, r - arr[i].X));
    }

    L.pb(lmi_a);
    for (auto p : lmi_u)
        L.pb(p.X);
    for (auto p : lmi_m) {
        L.pb(p.X.X);
        L.pb(p.X.Y);
    }
    for (auto p : lmi_d)
        L.pb(p.X);
    sort(ALL(L)), L.resize(unique(ALL(L)) - L.begin());

    M.pb(smi_a);
    for (auto p : smi_u)
        M.pb(p.X);
    for (auto p : smi_m) {
        M.pb(p.X.X);
        M.pb(p.X.Y);
    }
    for (auto p : smi_d)
        M.pb(p.X);
    sort(ALL(M)), M.resize(unique(ALL(M)) - M.begin());

    R.pb(rmi_a);
    for (auto p : rmi_u)
        R.pb(p.X);
    for (auto p : rmi_m) {
        R.pb(p.X.X);
        R.pb(p.X.Y);
    }
    for (auto p : rmi_d)
        R.pb(p.X);
    sort(ALL(R)), R.resize(unique(ALL(R)) - R.begin());

    for (int lft : L) {
        if (lft < lmi_a)
            continue;
        val.clear();
        if (smi_a >= lft)
            val.pb(smi_a);
        val.pb(lft + rmi_a);
        for (int sum : M)
            if (sum >= lft)
                val.pb(sum);
        for (int rgt : R)
            val.pb(rgt + lft);
        sort(ALL(val)), val.resize(unique(ALL(val)) - val.begin());
        vector<int> seg_u(4 * SZ(val)), res_u(SZ(val));
        vector<int> seg_m(4 * SZ(val)), res_m(SZ(val));
        vector<int> seg_d(4 * SZ(val)), res_d(SZ(val));

        modify(seg_u, 0, SZ(val), umx);
        for (auto p : smx)
            modify(seg_m, lower_bound(ALL(val), p.X) - val.begin(), SZ(val), p.Y);
        modify(seg_d, 0, SZ(val), dmx);

        for (auto p : lmi_u)
            if (lft < p.X)
                modify(seg_u, 0, SZ(val), p.Y);
        for (auto p : lmi_m)
            if (lft < p.X.Y)
                modify(seg_m, lower_bound(ALL(val), p.X.X) - val.begin(), SZ(val), p.Y);
        for (auto p : lmi_d)
            if (lft < p.X)
                modify(seg_d, 0, SZ(val), p.Y);

        for (auto p : smi_u)
            modify(seg_u, 0, lower_bound(ALL(val), p.X) - val.begin(), p.Y);
        for (auto p : smi_m)
            modify(seg_m, lower_bound(ALL(val), p.X.X) - val.begin(), lower_bound(ALL(val), p.X.Y) - val.begin(), p.Y);
        for (auto p : smi_d)
            modify(seg_d, 0, lower_bound(ALL(val), p.X) - val.begin(), p.Y);

        for (auto p : rmi_u)
            modify(seg_u, 0, lower_bound(ALL(val), p.X + lft) - val.begin(), p.Y);
        for (auto p : rmi_m)
            modify(seg_m, lower_bound(ALL(val), p.X.X) - val.begin(), lower_bound(ALL(val), p.X.Y + lft) - val.begin(), p.Y);
        for (auto p : rmi_d)
            modify(seg_d, 0, lower_bound(ALL(val), p.X + lft) - val.begin(), p.Y);
        
        dfs(seg_u, 0, SZ(val) - 1, 1, 0, res_u);
        dfs(seg_m, 0, SZ(val) - 1, 1, 0, res_m);
        dfs(seg_d, 0, SZ(val) - 1, 1, 0, res_d);

        for (int i = 0; i < SZ(val); ++i) {
            if (val[i] < smi_a || val[i] - lft < rmi_a)
                continue;
            ans = min(ans, val[i] + max(res_m[i], res_u[i] + res_d[i]));
        }
    }

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

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 216 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 0 ms 204 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 216 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 0 ms 204 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 3 ms 332 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 8 ms 332 KB Output is correct
25 Correct 5 ms 332 KB Output is correct
26 Correct 22 ms 368 KB Output is correct
27 Correct 21 ms 376 KB Output is correct
28 Correct 8 ms 332 KB Output is correct
29 Correct 22 ms 332 KB Output is correct
30 Correct 23 ms 364 KB Output is correct
31 Correct 26 ms 332 KB Output is correct
32 Correct 28 ms 372 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 216 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 0 ms 204 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 3 ms 332 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 8 ms 332 KB Output is correct
25 Correct 5 ms 332 KB Output is correct
26 Correct 22 ms 368 KB Output is correct
27 Correct 21 ms 376 KB Output is correct
28 Correct 8 ms 332 KB Output is correct
29 Correct 22 ms 332 KB Output is correct
30 Correct 23 ms 364 KB Output is correct
31 Correct 26 ms 332 KB Output is correct
32 Correct 28 ms 372 KB Output is correct
33 Correct 7 ms 716 KB Output is correct
34 Correct 11 ms 368 KB Output is correct
35 Correct 59 ms 392 KB Output is correct
36 Correct 85 ms 540 KB Output is correct
37 Correct 77 ms 644 KB Output is correct
38 Correct 74 ms 552 KB Output is correct
39 Correct 105 ms 460 KB Output is correct
40 Correct 91 ms 540 KB Output is correct
41 Correct 290 ms 976 KB Output is correct
42 Correct 24 ms 332 KB Output is correct
43 Correct 194 ms 580 KB Output is correct
44 Correct 47 ms 440 KB Output is correct

Subtask #4
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Incorrect 1 ms 332 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Incorrect 1 ms 332 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 216 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 0 ms 204 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 3 ms 332 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 8 ms 332 KB Output is correct
25 Correct 5 ms 332 KB Output is correct
26 Correct 22 ms 368 KB Output is correct
27 Correct 21 ms 376 KB Output is correct
28 Correct 8 ms 332 KB Output is correct
29 Correct 22 ms 332 KB Output is correct
30 Correct 23 ms 364 KB Output is correct
31 Correct 26 ms 332 KB Output is correct
32 Correct 28 ms 372 KB Output is correct
33 Correct 7 ms 716 KB Output is correct
34 Correct 11 ms 368 KB Output is correct
35 Correct 59 ms 392 KB Output is correct
36 Correct 85 ms 540 KB Output is correct
37 Correct 77 ms 644 KB Output is correct
38 Correct 74 ms 552 KB Output is correct
39 Correct 105 ms 460 KB Output is correct
40 Correct 91 ms 540 KB Output is correct
41 Correct 290 ms 976 KB Output is correct
42 Correct 24 ms 332 KB Output is correct
43 Correct 194 ms 580 KB Output is correct
44 Correct 47 ms 440 KB Output is correct
45 Correct 1 ms 332 KB Output is correct
46 Correct 1 ms 332 KB Output is correct
47 Correct 1 ms 332 KB Output is correct
48 Correct 1 ms 204 KB Output is correct
49 Correct 1 ms 332 KB Output is correct
50 Correct 1 ms 332 KB Output is correct
51 Incorrect 1 ms 332 KB Output isn't correct
52 Halted 0 ms 0 KB -