oj.uz

Submission #47089

# Submission time Handle Problem Language Result Execution time Memory
47089 2018-04-27T11:17:28 Z SpaimaCarpatilor Cultivation (JOI17_cultivation) C++17
80 / 100
 2000 ms 6040 KB 
#include<bits/stdc++.h>

using namespace std;

int N, R, C, x[309], y[309], precalc[309][309][3];
const int INF = 1e9 + 100;
long long ans = 1LL << 60;
set < int > sa, sb, sab;

namespace ds {
    multiset < int > xs, dx;

    void init ()
    {
        xs.clear (), dx.clear ();
    }

    void delDif (int x)
    {
        dx.erase (dx.find (x));
    }

    void add (int x)
    {
        if (xs.find (x) != xs.end ()) xs.insert (x);
        else
        {
            xs.insert (x);
            auto it1 = xs.lower_bound (x), it2 = xs.upper_bound (x);
            if (it1 != xs.begin () && it2 != xs.end ())
                it1 --,
                delDif ((*it2) - (*it1)),
                it1 ++;
            if (it1 != xs.begin ())
                it1 --,
                dx.insert (x - (*it1));
            if (it2 != xs.end ())
                dx.insert ((*it2) - x);
        }
    }

    void del (int x)
    {
        if (xs.count (x) >= 2) xs.erase (xs.find (x));
        else
        {
            auto it1 = xs.lower_bound (x), it2 = xs.upper_bound (x);
            if (it1 != xs.begin () && it2 != xs.end ())
                it1 --,
                dx.insert ((*it2) - (*it1)),
                it1 ++;
            if (it1 != xs.begin ())
                it1 --,
                delDif (x - (*it1));
            if (it2 != xs.end ())
                delDif ((*it2) - x);
            xs.erase (x);
        }
    }

    int maxDif ()
    {
        if (dx.empty ()) return 0;
        return *(dx.rbegin ());
    }

    int getA ()
    {
        if (xs.empty ()) return INF;
        return (*xs.begin ()) - 1;
    }

    int getB ()
    {
        if (xs.empty ()) return INF;
        return C - (*xs.rbegin ());
    }

    void store (int &a, int &b, int &df)
    {
        a = getA ();
        b = getB ();
        df = maxDif () - 1;
    }
};

long long pos[1209];
int nr, stat[1209][3];
vector < pair < long long, int > > events;
deque < int > dq[3];

void clearDeque ()
{
    for (int i=0; i<3; i++)
        while (!dq[i].empty ())
            dq[i].pop_back ();
}

void add (int pos)
{
    for (int i=0; i<3; i++)
    {
        while (!dq[i].empty () && stat[dq[i].back ()][i] <= stat[pos][i])
            dq[i].pop_back ();
        dq[i].push_back (pos);
    }
}

void del (int pos)
{
    for (int i=0; i<3; i++)
        while (!dq[i].empty () && dq[i].front () <= pos)
            dq[i].pop_front ();
}

int getSum ()
{
    if (dq[0].empty ()) return 2 * INF;
    int minA = stat[dq[0].front ()][0], minB = stat[dq[1].front ()][1], minAB = stat[dq[2].front ()][2];
    return max (minA + minB, minAB);
}

void solve (int updown)
{
    ds::init ();
    clearDeque ();
    vector < long long > relevantXs, relevantX1, relevantX2;
    for (int i=1; i<=N; i++)
        relevantX1.push_back (x[i]),
        relevantX2.push_back (x[i] + updown + 1);
    relevantXs.resize (relevantX1.size () + relevantX2.size ());
    merge (relevantX1.begin (), relevantX1.end (), relevantX2.begin (), relevantX2.end (), relevantXs.begin ());

    nr = 1, pos[1] = -(1LL << 60), stat[1][0] = INF, stat[1][1] = INF, stat[1][2] = -1;
    int l = 1, r = 0;
    for (auto t : relevantXs)
    {
        while (r < N && x[r + 1] <= t)
            r ++;
        while (x[l] + updown < t && l <= N)
            l ++;
        nr ++, pos[nr] = t;
        stat[nr][0] = precalc[l][r][0];
        stat[nr][1] = precalc[l][r][1];
        stat[nr][2] = precalc[l][r][2];
    }
    pos[nr + 1] = 1LL << 60;
/*    printf ("%d ->\n", updown);
    for (int i=1; i<=nr; i++)
        printf ("%7lld %7d %7d %7d\n", pos[i], stat[i][0], stat[i][1], stat[i][2]);*/
    vector < long long > relevantShifts, relevantS1, relevantS2;
    for (int i=1; i<=nr; i++)
    {
        if (pos[i] - 1 <= updown) relevantS1.push_back (pos[i] - 1);
        if (pos[i] - R >= 0 && pos[i] - R <= updown) relevantS2.push_back (pos[i] - R);
    }
    relevantShifts.resize (relevantS1.size () + relevantS2.size ());
    merge (relevantS1.begin (), relevantS1.end (), relevantS2.begin (), relevantS2.end (), relevantShifts.begin ());
    relevantShifts.push_back (updown);
    int j = 1, i = 1;
    for (auto shift : relevantShifts)
    {
        while (j <= nr && pos[j] <= R + shift)
            add (j), j++;
        while (pos[i + 1] - 1 < 1 + shift)
            del (i), i ++;
        long long curr = (long long) updown + getSum ();
        if (curr < ans)
            ans = curr;
    }
}

void readAndSort ()
{
    pair < int, int > point[309];
    scanf ("%d %d\n", &R, &C);
    scanf ("%d", &N);
    for (int i=1; i<=N; i++)
        scanf ("%d %d", &point[i].first, &point[i].second);
    sort (point + 1, point + N + 1);
    for (int i=1; i<=N; i++)
        x[i] = point[i].first, y[i] = point[i].second;
}

void doPrecalc ()
{
    for (int i=1; i<=N + 1; i++)
    {
        ds::init ();
        ds::store (precalc[i][i - 1][0], precalc[i][i - 1][1], precalc[i][i - 1][2]);
        for (int j=i; j<=N; j++)
            ds::add (y[j]),
            ds::store (precalc[i][j][0], precalc[i][j][1], precalc[i][j][2]);
    }
}

int main ()
{
//freopen ("input", "r", stdin);
//freopen ("output", "w", stdout);

readAndSort ();
doPrecalc ();
for (int i=1; i<=N; i++)
    sa.insert (x[i] - 1), sb.insert (R - x[i]);
for (int i=1; i<=N; i++)
    for (int j=i + 1; j<=N; j++)
    if (x[i] != x[j])
    {
        int val = x[i] - x[j];
        if (val < 0) val = -val;
        sab.insert (val - 1);
    }
for (auto a : sa)
    for (auto b : sb)
        sab.insert (a + b);
for (auto ab : sab)
    if (ab <= ans)
        solve (ab);
printf ("%lld\n", ans);
return 0;
}

Compilation message

cultivation.cpp: In function 'void readAndSort()':
cultivation.cpp:176:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf ("%d %d\n", &R, &C);
     ~~~~~~^~~~~~~~~~~~~~~~~~~
cultivation.cpp:177:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf ("%d", &N);
     ~~~~~~^~~~~~~~~~
cultivation.cpp:179:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf ("%d %d", &point[i].first, &point[i].second);
         ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 520 KB Output is correct
4 Correct 2 ms 520 KB Output is correct
5 Correct 2 ms 520 KB Output is correct
6 Correct 2 ms 536 KB Output is correct
7 Correct 2 ms 588 KB Output is correct
8 Correct 2 ms 592 KB Output is correct
9 Correct 2 ms 716 KB Output is correct
10 Correct 2 ms 716 KB Output is correct
11 Correct 2 ms 716 KB Output is correct
12 Correct 2 ms 716 KB Output is correct
13 Correct 2 ms 716 KB Output is correct
14 Correct 2 ms 716 KB Output is correct
15 Correct 2 ms 716 KB Output is correct
16 Correct 2 ms 716 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 520 KB Output is correct
4 Correct 2 ms 520 KB Output is correct
5 Correct 2 ms 520 KB Output is correct
6 Correct 2 ms 536 KB Output is correct
7 Correct 2 ms 588 KB Output is correct
8 Correct 2 ms 592 KB Output is correct
9 Correct 2 ms 716 KB Output is correct
10 Correct 2 ms 716 KB Output is correct
11 Correct 2 ms 716 KB Output is correct
12 Correct 2 ms 716 KB Output is correct
13 Correct 2 ms 716 KB Output is correct
14 Correct 2 ms 716 KB Output is correct
15 Correct 2 ms 716 KB Output is correct
16 Correct 2 ms 716 KB Output is correct
17 Correct 2 ms 716 KB Output is correct
18 Correct 3 ms 1004 KB Output is correct
19 Correct 2 ms 1004 KB Output is correct
20 Correct 2 ms 1004 KB Output is correct
21 Correct 3 ms 1004 KB Output is correct
22 Correct 5 ms 1020 KB Output is correct
23 Correct 2 ms 1020 KB Output is correct
24 Correct 8 ms 1404 KB Output is correct
25 Correct 6 ms 1404 KB Output is correct
26 Correct 15 ms 1672 KB Output is correct
27 Correct 14 ms 1672 KB Output is correct
28 Correct 8 ms 1672 KB Output is correct
29 Correct 14 ms 1672 KB Output is correct
30 Correct 14 ms 1788 KB Output is correct
31 Correct 14 ms 1788 KB Output is correct
32 Correct 14 ms 1788 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 520 KB Output is correct
4 Correct 2 ms 520 KB Output is correct
5 Correct 2 ms 520 KB Output is correct
6 Correct 2 ms 536 KB Output is correct
7 Correct 2 ms 588 KB Output is correct
8 Correct 2 ms 592 KB Output is correct
9 Correct 2 ms 716 KB Output is correct
10 Correct 2 ms 716 KB Output is correct
11 Correct 2 ms 716 KB Output is correct
12 Correct 2 ms 716 KB Output is correct
13 Correct 2 ms 716 KB Output is correct
14 Correct 2 ms 716 KB Output is correct
15 Correct 2 ms 716 KB Output is correct
16 Correct 2 ms 716 KB Output is correct
17 Correct 2 ms 716 KB Output is correct
18 Correct 3 ms 1004 KB Output is correct
19 Correct 2 ms 1004 KB Output is correct
20 Correct 2 ms 1004 KB Output is correct
21 Correct 3 ms 1004 KB Output is correct
22 Correct 5 ms 1020 KB Output is correct
23 Correct 2 ms 1020 KB Output is correct
24 Correct 8 ms 1404 KB Output is correct
25 Correct 6 ms 1404 KB Output is correct
26 Correct 15 ms 1672 KB Output is correct
27 Correct 14 ms 1672 KB Output is correct
28 Correct 8 ms 1672 KB Output is correct
29 Correct 14 ms 1672 KB Output is correct
30 Correct 14 ms 1788 KB Output is correct
31 Correct 14 ms 1788 KB Output is correct
32 Correct 14 ms 1788 KB Output is correct
33 Correct 22 ms 1788 KB Output is correct
34 Correct 19 ms 1788 KB Output is correct
35 Correct 34 ms 1788 KB Output is correct
36 Correct 35 ms 1788 KB Output is correct
37 Correct 34 ms 1788 KB Output is correct
38 Correct 34 ms 1788 KB Output is correct
39 Correct 35 ms 1788 KB Output is correct
40 Correct 35 ms 1788 KB Output is correct
41 Correct 38 ms 1788 KB Output is correct
42 Correct 25 ms 1804 KB Output is correct
43 Correct 37 ms 1804 KB Output is correct
44 Correct 26 ms 1916 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1916 KB Output is correct
2 Correct 4 ms 1916 KB Output is correct
3 Correct 3 ms 1916 KB Output is correct
4 Correct 6 ms 1916 KB Output is correct
5 Correct 5 ms 1916 KB Output is correct
6 Correct 3 ms 1916 KB Output is correct
7 Correct 2 ms 1916 KB Output is correct
8 Correct 6 ms 1916 KB Output is correct
9 Correct 4 ms 1916 KB Output is correct
10 Correct 5 ms 1916 KB Output is correct
11 Correct 4 ms 1916 KB Output is correct
12 Correct 3 ms 1916 KB Output is correct
13 Correct 3 ms 1916 KB Output is correct
14 Correct 3 ms 1916 KB Output is correct
15 Correct 3 ms 1916 KB Output is correct
16 Correct 5 ms 1916 KB Output is correct
17 Correct 4 ms 1916 KB Output is correct
18 Correct 4 ms 1916 KB Output is correct
19 Correct 7 ms 1916 KB Output is correct
20 Correct 5 ms 1916 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1916 KB Output is correct
2 Correct 4 ms 1916 KB Output is correct
3 Correct 3 ms 1916 KB Output is correct
4 Correct 6 ms 1916 KB Output is correct
5 Correct 5 ms 1916 KB Output is correct
6 Correct 3 ms 1916 KB Output is correct
7 Correct 2 ms 1916 KB Output is correct
8 Correct 6 ms 1916 KB Output is correct
9 Correct 4 ms 1916 KB Output is correct
10 Correct 5 ms 1916 KB Output is correct
11 Correct 4 ms 1916 KB Output is correct
12 Correct 3 ms 1916 KB Output is correct
13 Correct 3 ms 1916 KB Output is correct
14 Correct 3 ms 1916 KB Output is correct
15 Correct 3 ms 1916 KB Output is correct
16 Correct 5 ms 1916 KB Output is correct
17 Correct 4 ms 1916 KB Output is correct
18 Correct 4 ms 1916 KB Output is correct
19 Correct 7 ms 1916 KB Output is correct
20 Correct 5 ms 1916 KB Output is correct
21 Correct 23 ms 1916 KB Output is correct
22 Correct 60 ms 1916 KB Output is correct
23 Correct 182 ms 1916 KB Output is correct
24 Correct 179 ms 1916 KB Output is correct
25 Correct 60 ms 1916 KB Output is correct
26 Correct 46 ms 1916 KB Output is correct
27 Correct 194 ms 1916 KB Output is correct
28 Correct 62 ms 1916 KB Output is correct
29 Correct 63 ms 1916 KB Output is correct
30 Correct 71 ms 1916 KB Output is correct
31 Correct 57 ms 1916 KB Output is correct
32 Correct 64 ms 1916 KB Output is correct
33 Correct 187 ms 1916 KB Output is correct
34 Correct 147 ms 1916 KB Output is correct
35 Correct 147 ms 1916 KB Output is correct
36 Correct 66 ms 1916 KB Output is correct

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 520 KB Output is correct
4 Correct 2 ms 520 KB Output is correct
5 Correct 2 ms 520 KB Output is correct
6 Correct 2 ms 536 KB Output is correct
7 Correct 2 ms 588 KB Output is correct
8 Correct 2 ms 592 KB Output is correct
9 Correct 2 ms 716 KB Output is correct
10 Correct 2 ms 716 KB Output is correct
11 Correct 2 ms 716 KB Output is correct
12 Correct 2 ms 716 KB Output is correct
13 Correct 2 ms 716 KB Output is correct
14 Correct 2 ms 716 KB Output is correct
15 Correct 2 ms 716 KB Output is correct
16 Correct 2 ms 716 KB Output is correct
17 Correct 2 ms 716 KB Output is correct
18 Correct 3 ms 1004 KB Output is correct
19 Correct 2 ms 1004 KB Output is correct
20 Correct 2 ms 1004 KB Output is correct
21 Correct 3 ms 1004 KB Output is correct
22 Correct 5 ms 1020 KB Output is correct
23 Correct 2 ms 1020 KB Output is correct
24 Correct 8 ms 1404 KB Output is correct
25 Correct 6 ms 1404 KB Output is correct
26 Correct 15 ms 1672 KB Output is correct
27 Correct 14 ms 1672 KB Output is correct
28 Correct 8 ms 1672 KB Output is correct
29 Correct 14 ms 1672 KB Output is correct
30 Correct 14 ms 1788 KB Output is correct
31 Correct 14 ms 1788 KB Output is correct
32 Correct 14 ms 1788 KB Output is correct
33 Correct 22 ms 1788 KB Output is correct
34 Correct 19 ms 1788 KB Output is correct
35 Correct 34 ms 1788 KB Output is correct
36 Correct 35 ms 1788 KB Output is correct
37 Correct 34 ms 1788 KB Output is correct
38 Correct 34 ms 1788 KB Output is correct
39 Correct 35 ms 1788 KB Output is correct
40 Correct 35 ms 1788 KB Output is correct
41 Correct 38 ms 1788 KB Output is correct
42 Correct 25 ms 1804 KB Output is correct
43 Correct 37 ms 1804 KB Output is correct
44 Correct 26 ms 1916 KB Output is correct
45 Correct 3 ms 1916 KB Output is correct
46 Correct 4 ms 1916 KB Output is correct
47 Correct 3 ms 1916 KB Output is correct
48 Correct 6 ms 1916 KB Output is correct
49 Correct 5 ms 1916 KB Output is correct
50 Correct 3 ms 1916 KB Output is correct
51 Correct 2 ms 1916 KB Output is correct
52 Correct 6 ms 1916 KB Output is correct
53 Correct 4 ms 1916 KB Output is correct
54 Correct 5 ms 1916 KB Output is correct
55 Correct 4 ms 1916 KB Output is correct
56 Correct 3 ms 1916 KB Output is correct
57 Correct 3 ms 1916 KB Output is correct
58 Correct 3 ms 1916 KB Output is correct
59 Correct 3 ms 1916 KB Output is correct
60 Correct 5 ms 1916 KB Output is correct
61 Correct 4 ms 1916 KB Output is correct
62 Correct 4 ms 1916 KB Output is correct
63 Correct 7 ms 1916 KB Output is correct
64 Correct 5 ms 1916 KB Output is correct
65 Correct 23 ms 1916 KB Output is correct
66 Correct 60 ms 1916 KB Output is correct
67 Correct 182 ms 1916 KB Output is correct
68 Correct 179 ms 1916 KB Output is correct
69 Correct 60 ms 1916 KB Output is correct
70 Correct 46 ms 1916 KB Output is correct
71 Correct 194 ms 1916 KB Output is correct
72 Correct 62 ms 1916 KB Output is correct
73 Correct 63 ms 1916 KB Output is correct
74 Correct 71 ms 1916 KB Output is correct
75 Correct 57 ms 1916 KB Output is correct
76 Correct 64 ms 1916 KB Output is correct
77 Correct 187 ms 1916 KB Output is correct
78 Correct 147 ms 1916 KB Output is correct
79 Correct 147 ms 1916 KB Output is correct
80 Correct 66 ms 1916 KB Output is correct
81 Correct 409 ms 4940 KB Output is correct
82 Correct 445 ms 4940 KB Output is correct
83 Correct 310 ms 5028 KB Output is correct
84 Execution timed out 2057 ms 6040 KB Time limit exceeded
85 Halted 0 ms 0 KB -