oj.uz

Submission #47087

# Submission time Handle Problem Language Result Execution time Memory
47087 2018-04-27T11:08:55 Z SpaimaCarpatilor Cultivation (JOI17_cultivation) C++17
80 / 100
 2000 ms 5416 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)
    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 3 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 412 KB Output is correct
4 Correct 2 ms 464 KB Output is correct
5 Correct 2 ms 464 KB Output is correct
6 Correct 2 ms 660 KB Output is correct
7 Correct 2 ms 660 KB Output is correct
8 Correct 2 ms 660 KB Output is correct
9 Correct 2 ms 660 KB Output is correct
10 Correct 2 ms 660 KB Output is correct
11 Correct 2 ms 660 KB Output is correct
12 Correct 2 ms 660 KB Output is correct
13 Correct 2 ms 660 KB Output is correct
14 Correct 2 ms 660 KB Output is correct
15 Correct 2 ms 660 KB Output is correct
16 Correct 2 ms 748 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 412 KB Output is correct
4 Correct 2 ms 464 KB Output is correct
5 Correct 2 ms 464 KB Output is correct
6 Correct 2 ms 660 KB Output is correct
7 Correct 2 ms 660 KB Output is correct
8 Correct 2 ms 660 KB Output is correct
9 Correct 2 ms 660 KB Output is correct
10 Correct 2 ms 660 KB Output is correct
11 Correct 2 ms 660 KB Output is correct
12 Correct 2 ms 660 KB Output is correct
13 Correct 2 ms 660 KB Output is correct
14 Correct 2 ms 660 KB Output is correct
15 Correct 2 ms 660 KB Output is correct
16 Correct 2 ms 748 KB Output is correct
17 Correct 2 ms 748 KB Output is correct
18 Correct 3 ms 892 KB Output is correct
19 Correct 3 ms 892 KB Output is correct
20 Correct 2 ms 892 KB Output is correct
21 Correct 3 ms 892 KB Output is correct
22 Correct 5 ms 1024 KB Output is correct
23 Correct 2 ms 1024 KB Output is correct
24 Correct 10 ms 1404 KB Output is correct
25 Correct 7 ms 1404 KB Output is correct
26 Correct 16 ms 1788 KB Output is correct
27 Correct 16 ms 1788 KB Output is correct
28 Correct 10 ms 1788 KB Output is correct
29 Correct 16 ms 1788 KB Output is correct
30 Correct 19 ms 1788 KB Output is correct
31 Correct 16 ms 1788 KB Output is correct
32 Correct 16 ms 1788 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 412 KB Output is correct
4 Correct 2 ms 464 KB Output is correct
5 Correct 2 ms 464 KB Output is correct
6 Correct 2 ms 660 KB Output is correct
7 Correct 2 ms 660 KB Output is correct
8 Correct 2 ms 660 KB Output is correct
9 Correct 2 ms 660 KB Output is correct
10 Correct 2 ms 660 KB Output is correct
11 Correct 2 ms 660 KB Output is correct
12 Correct 2 ms 660 KB Output is correct
13 Correct 2 ms 660 KB Output is correct
14 Correct 2 ms 660 KB Output is correct
15 Correct 2 ms 660 KB Output is correct
16 Correct 2 ms 748 KB Output is correct
17 Correct 2 ms 748 KB Output is correct
18 Correct 3 ms 892 KB Output is correct
19 Correct 3 ms 892 KB Output is correct
20 Correct 2 ms 892 KB Output is correct
21 Correct 3 ms 892 KB Output is correct
22 Correct 5 ms 1024 KB Output is correct
23 Correct 2 ms 1024 KB Output is correct
24 Correct 10 ms 1404 KB Output is correct
25 Correct 7 ms 1404 KB Output is correct
26 Correct 16 ms 1788 KB Output is correct
27 Correct 16 ms 1788 KB Output is correct
28 Correct 10 ms 1788 KB Output is correct
29 Correct 16 ms 1788 KB Output is correct
30 Correct 19 ms 1788 KB Output is correct
31 Correct 16 ms 1788 KB Output is correct
32 Correct 16 ms 1788 KB Output is correct
33 Correct 26 ms 1788 KB Output is correct
34 Correct 22 ms 1788 KB Output is correct
35 Correct 36 ms 1788 KB Output is correct
36 Correct 34 ms 1788 KB Output is correct
37 Correct 34 ms 1788 KB Output is correct
38 Correct 37 ms 1788 KB Output is correct
39 Correct 36 ms 1788 KB Output is correct
40 Correct 36 ms 1916 KB Output is correct
41 Correct 24 ms 1916 KB Output is correct
42 Correct 26 ms 1916 KB Output is correct
43 Correct 37 ms 1916 KB Output is correct
44 Correct 27 ms 1916 KB Output is correct

Subtask #4
30.0 / 30.0

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

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1916 KB Output is correct
2 Correct 9 ms 1916 KB Output is correct
3 Correct 6 ms 1916 KB Output is correct
4 Correct 7 ms 1916 KB Output is correct
5 Correct 7 ms 1916 KB Output is correct
6 Correct 4 ms 1916 KB Output is correct
7 Correct 3 ms 1916 KB Output is correct
8 Correct 10 ms 1916 KB Output is correct
9 Correct 5 ms 1916 KB Output is correct
10 Correct 6 ms 1916 KB Output is correct
11 Correct 6 ms 1916 KB Output is correct
12 Correct 6 ms 1916 KB Output is correct
13 Correct 4 ms 1916 KB Output is correct
14 Correct 5 ms 1916 KB Output is correct
15 Correct 3 ms 1916 KB Output is correct
16 Correct 6 ms 1916 KB Output is correct
17 Correct 10 ms 1916 KB Output is correct
18 Correct 4 ms 1916 KB Output is correct
19 Correct 6 ms 1916 KB Output is correct
20 Correct 6 ms 1916 KB Output is correct
21 Correct 122 ms 1916 KB Output is correct
22 Correct 238 ms 1916 KB Output is correct
23 Correct 200 ms 1916 KB Output is correct
24 Correct 185 ms 1916 KB Output is correct
25 Correct 205 ms 1916 KB Output is correct
26 Correct 86 ms 1916 KB Output is correct
27 Correct 237 ms 1916 KB Output is correct
28 Correct 187 ms 1916 KB Output is correct
29 Correct 286 ms 1916 KB Output is correct
30 Correct 206 ms 1916 KB Output is correct
31 Correct 194 ms 1916 KB Output is correct
32 Correct 219 ms 1916 KB Output is correct
33 Correct 179 ms 1916 KB Output is correct
34 Correct 181 ms 1916 KB Output is correct
35 Correct 178 ms 1916 KB Output is correct
36 Correct 183 ms 1916 KB Output is correct

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 412 KB Output is correct
4 Correct 2 ms 464 KB Output is correct
5 Correct 2 ms 464 KB Output is correct
6 Correct 2 ms 660 KB Output is correct
7 Correct 2 ms 660 KB Output is correct
8 Correct 2 ms 660 KB Output is correct
9 Correct 2 ms 660 KB Output is correct
10 Correct 2 ms 660 KB Output is correct
11 Correct 2 ms 660 KB Output is correct
12 Correct 2 ms 660 KB Output is correct
13 Correct 2 ms 660 KB Output is correct
14 Correct 2 ms 660 KB Output is correct
15 Correct 2 ms 660 KB Output is correct
16 Correct 2 ms 748 KB Output is correct
17 Correct 2 ms 748 KB Output is correct
18 Correct 3 ms 892 KB Output is correct
19 Correct 3 ms 892 KB Output is correct
20 Correct 2 ms 892 KB Output is correct
21 Correct 3 ms 892 KB Output is correct
22 Correct 5 ms 1024 KB Output is correct
23 Correct 2 ms 1024 KB Output is correct
24 Correct 10 ms 1404 KB Output is correct
25 Correct 7 ms 1404 KB Output is correct
26 Correct 16 ms 1788 KB Output is correct
27 Correct 16 ms 1788 KB Output is correct
28 Correct 10 ms 1788 KB Output is correct
29 Correct 16 ms 1788 KB Output is correct
30 Correct 19 ms 1788 KB Output is correct
31 Correct 16 ms 1788 KB Output is correct
32 Correct 16 ms 1788 KB Output is correct
33 Correct 26 ms 1788 KB Output is correct
34 Correct 22 ms 1788 KB Output is correct
35 Correct 36 ms 1788 KB Output is correct
36 Correct 34 ms 1788 KB Output is correct
37 Correct 34 ms 1788 KB Output is correct
38 Correct 37 ms 1788 KB Output is correct
39 Correct 36 ms 1788 KB Output is correct
40 Correct 36 ms 1916 KB Output is correct
41 Correct 24 ms 1916 KB Output is correct
42 Correct 26 ms 1916 KB Output is correct
43 Correct 37 ms 1916 KB Output is correct
44 Correct 27 ms 1916 KB Output is correct
45 Correct 4 ms 1916 KB Output is correct
46 Correct 9 ms 1916 KB Output is correct
47 Correct 6 ms 1916 KB Output is correct
48 Correct 7 ms 1916 KB Output is correct
49 Correct 7 ms 1916 KB Output is correct
50 Correct 4 ms 1916 KB Output is correct
51 Correct 3 ms 1916 KB Output is correct
52 Correct 10 ms 1916 KB Output is correct
53 Correct 5 ms 1916 KB Output is correct
54 Correct 6 ms 1916 KB Output is correct
55 Correct 6 ms 1916 KB Output is correct
56 Correct 6 ms 1916 KB Output is correct
57 Correct 4 ms 1916 KB Output is correct
58 Correct 5 ms 1916 KB Output is correct
59 Correct 3 ms 1916 KB Output is correct
60 Correct 6 ms 1916 KB Output is correct
61 Correct 10 ms 1916 KB Output is correct
62 Correct 4 ms 1916 KB Output is correct
63 Correct 6 ms 1916 KB Output is correct
64 Correct 6 ms 1916 KB Output is correct
65 Correct 122 ms 1916 KB Output is correct
66 Correct 238 ms 1916 KB Output is correct
67 Correct 200 ms 1916 KB Output is correct
68 Correct 185 ms 1916 KB Output is correct
69 Correct 205 ms 1916 KB Output is correct
70 Correct 86 ms 1916 KB Output is correct
71 Correct 237 ms 1916 KB Output is correct
72 Correct 187 ms 1916 KB Output is correct
73 Correct 286 ms 1916 KB Output is correct
74 Correct 206 ms 1916 KB Output is correct
75 Correct 194 ms 1916 KB Output is correct
76 Correct 219 ms 1916 KB Output is correct
77 Correct 179 ms 1916 KB Output is correct
78 Correct 181 ms 1916 KB Output is correct
79 Correct 178 ms 1916 KB Output is correct
80 Correct 183 ms 1916 KB Output is correct
81 Correct 1828 ms 5148 KB Output is correct
82 Correct 1824 ms 5148 KB Output is correct
83 Execution timed out 2060 ms 5416 KB Time limit exceeded
84 Halted 0 ms 0 KB -