oj.uz

Submission #127539

# Submission time Handle Problem Language Result Execution time Memory
127539 2019-07-09T14:19:26 Z arnold518 Bulldozer (JOI17_bulldozer) C++14
80 / 100
 1490 ms 95444 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 2000;

struct Mine
{
    ll x, y, w;
};

struct Line
{
    ll x, y, z;
    int m1, m2;
};

int n, pos[MAXN+10];
Mine mine[MAXN+10];
ll arr[MAXN+10], ans;

struct SEG
{
    ll ans[4*MAXN+10], lsum[4*MAXN+10], rsum[4*MAXN+10], sum[4*MAXN+10];

    SEG()
    {
        memset(ans, 0, sizeof(ans));
        memset(lsum, 0, sizeof(lsum));
        memset(rsum, 0, sizeof(rsum));
        memset(sum, 0, sizeof(sum));
    }

    void update(int node, int tl, int tr, int pos, ll val)
    {
        if(tl==tr)
        {
            ans[node]=max(0ll, val);
            lsum[node]=max(0ll, val);
            rsum[node]=max(0ll, val);
            sum[node]=val;
            return;
        }
        int mid=tl+tr>>1;
        if(pos<=mid) update(node*2, tl, mid, pos, val);
        else update(node*2+1, mid+1, tr, pos, val);

        lsum[node]=max(lsum[node*2], sum[node*2]+lsum[node*2+1]);
        rsum[node]=max(rsum[node*2+1], sum[node*2+1]+rsum[node*2]);
        sum[node]=sum[node*2]+sum[node*2+1];
        ans[node]=max(max(0ll, rsum[node*2]+lsum[node*2+1]), max(ans[node*2], ans[node*2+1]));
    }

    ll query()
    {
        return ans[1];
    }
};
SEG seg;

int main()
{
    int i, j;

    scanf("%d", &n);
    for(i=1; i<=n; i++) scanf("%lld%lld%lld", &mine[i].x, &mine[i].y, &mine[i].w);
    sort(mine+1, mine+n+1, [&](const Mine p, const Mine q)
        {
            if(p.x!=q.x) return p.x<q.x;
            return p.y<q.y;
        });

    for(i=1; i<=n; i++)
    {
        pos[i]=i;
        arr[i]=mine[i].w;
        seg.update(1, 1, n, i, mine[i].w);
    }
    ans=seg.query();

    vector<Line> L;
    for(i=1; i<=n; i++) for(j=i+1; j<=n; j++)
    {
        Line now={mine[i].x-mine[j].x, mine[i].y-mine[j].y, mine[i].y*mine[j].x-mine[j].y*mine[i].x, i, j};
        if(now.x<0) now.x*=-1, now.y*=-1;
        if(now.x==0 && now.y>0) now.y*=-1;
        L.push_back(now);
    }
    sort(L.begin(), L.end(), [&](const Line p, const Line q)
        {
            if(q.x*p.y!=p.x*q.y) return q.x*p.y<p.x*q.y;
            if(q.x*p.z!=p.x*q.z) return q.x*p.z<p.x*q.z;
            if(mine[p.m1].x!=mine[q.m1].x) return mine[p.m1].x<mine[q.m1].x;
            return mine[p.m1].y<mine[q.m1].y;
        });

    for(i=0; i<L.size(); )
    {
        ll x=L[i].x, y=L[i].y, z=L[i].z;
        while(i<L.size() && L[i].x*y==L[i].y*x)
        {
            x=L[i].x, y=L[i].y, z=L[i].z;
            vector<int> todo;
            while(i<L.size() && L[i].x*z==L[i].z*x)
            {
                todo.push_back(L[i].m1);
                todo.push_back(L[i].m2);
                i++;
            }
            sort(todo.begin(), todo.end());
            todo.erase(unique(todo.begin(), todo.end()), todo.end());
            for(j=0; j<todo.size()/2; j++)
            {
                int m1=todo[j], m2=todo[todo.size()-j-1];
                seg.update(1, 1, n, pos[m1], arr[pos[m2]]);
                seg.update(1, 1, n, pos[m2], arr[pos[m1]]);
                swap(arr[pos[m1]], arr[pos[m2]]);
                swap(pos[m1], pos[m2]);
            }
        }
        ans=max(ans, seg.query());
    }
    printf("%lld", ans);
}

Compilation message

bulldozer.cpp: In member function 'void SEG::update(int, int, int, int, ll)':
bulldozer.cpp:47:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
         int mid=tl+tr>>1;
                 ~~^~~
bulldozer.cpp: In function 'int main()':
bulldozer.cpp:100:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(i=0; i<L.size(); )
              ~^~~~~~~~~
bulldozer.cpp:103:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         while(i<L.size() && L[i].x*y==L[i].y*x)
               ~^~~~~~~~~
bulldozer.cpp:107:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             while(i<L.size() && L[i].x*z==L[i].z*x)
                   ~^~~~~~~~~
bulldozer.cpp:115:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(j=0; j<todo.size()/2; j++)
                      ~^~~~~~~~~~~~~~
bulldozer.cpp:68:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
bulldozer.cpp:69:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(i=1; i<=n; i++) scanf("%lld%lld%lld", &mine[i].x, &mine[i].y, &mine[i].w);
                         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1016 KB Output is correct
2 Correct 3 ms 1016 KB Output is correct
3 Correct 3 ms 1016 KB Output is correct
4 Correct 3 ms 1016 KB Output is correct
5 Correct 3 ms 1016 KB Output is correct
6 Correct 3 ms 1016 KB Output is correct
7 Correct 3 ms 996 KB Output is correct
8 Correct 4 ms 1016 KB Output is correct
9 Correct 3 ms 1016 KB Output is correct
10 Correct 3 ms 1016 KB Output is correct
11 Correct 2 ms 632 KB Output is correct
12 Correct 2 ms 632 KB Output is correct
13 Correct 2 ms 632 KB Output is correct
14 Correct 2 ms 632 KB Output is correct
15 Correct 2 ms 636 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1016 KB Output is correct
2 Correct 5 ms 1144 KB Output is correct
3 Correct 5 ms 1020 KB Output is correct
4 Correct 5 ms 1016 KB Output is correct
5 Correct 5 ms 1016 KB Output is correct
6 Correct 5 ms 1016 KB Output is correct
7 Correct 5 ms 1016 KB Output is correct
8 Correct 5 ms 1016 KB Output is correct
9 Correct 5 ms 1016 KB Output is correct
10 Correct 5 ms 1016 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 632 KB Output is correct
13 Correct 2 ms 632 KB Output is correct
14 Correct 2 ms 636 KB Output is correct
15 Correct 2 ms 632 KB Output is correct
16 Correct 2 ms 632 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 2 ms 632 KB Output is correct
19 Correct 2 ms 632 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 5 ms 1016 KB Output is correct
22 Correct 5 ms 1016 KB Output is correct
23 Correct 5 ms 1016 KB Output is correct
24 Correct 5 ms 1020 KB Output is correct
25 Correct 5 ms 1016 KB Output is correct
26 Correct 5 ms 1016 KB Output is correct
27 Correct 5 ms 1016 KB Output is correct
28 Correct 5 ms 1016 KB Output is correct
29 Correct 5 ms 1016 KB Output is correct
30 Correct 5 ms 1016 KB Output is correct
31 Correct 5 ms 1016 KB Output is correct
32 Correct 5 ms 1016 KB Output is correct

Subtask #3
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1016 KB Output is correct
2 Correct 5 ms 1144 KB Output is correct
3 Correct 5 ms 1020 KB Output is correct
4 Correct 5 ms 1016 KB Output is correct
5 Correct 5 ms 1016 KB Output is correct
6 Correct 5 ms 1016 KB Output is correct
7 Correct 5 ms 1016 KB Output is correct
8 Correct 5 ms 1016 KB Output is correct
9 Correct 5 ms 1016 KB Output is correct
10 Correct 5 ms 1016 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 632 KB Output is correct
13 Correct 2 ms 632 KB Output is correct
14 Correct 2 ms 636 KB Output is correct
15 Correct 2 ms 632 KB Output is correct
16 Correct 2 ms 632 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 2 ms 632 KB Output is correct
19 Correct 2 ms 632 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 5 ms 1016 KB Output is correct
22 Correct 5 ms 1016 KB Output is correct
23 Correct 5 ms 1016 KB Output is correct
24 Correct 5 ms 1020 KB Output is correct
25 Correct 5 ms 1016 KB Output is correct
26 Correct 5 ms 1016 KB Output is correct
27 Correct 5 ms 1016 KB Output is correct
28 Correct 5 ms 1016 KB Output is correct
29 Correct 5 ms 1016 KB Output is correct
30 Correct 5 ms 1016 KB Output is correct
31 Correct 5 ms 1016 KB Output is correct
32 Correct 5 ms 1016 KB Output is correct
33 Correct 1471 ms 66520 KB Output is correct
34 Correct 1456 ms 66456 KB Output is correct
35 Correct 1461 ms 66544 KB Output is correct
36 Correct 1447 ms 66456 KB Output is correct
37 Correct 1456 ms 66456 KB Output is correct
38 Correct 1448 ms 66456 KB Output is correct
39 Correct 1453 ms 66456 KB Output is correct
40 Correct 1457 ms 66584 KB Output is correct
41 Correct 1454 ms 66584 KB Output is correct
42 Correct 1449 ms 66584 KB Output is correct
43 Correct 1460 ms 66584 KB Output is correct
44 Correct 1439 ms 66584 KB Output is correct
45 Correct 1442 ms 66584 KB Output is correct
46 Correct 1440 ms 66584 KB Output is correct
47 Correct 1448 ms 66584 KB Output is correct
48 Correct 1490 ms 66584 KB Output is correct
49 Correct 1452 ms 66584 KB Output is correct
50 Correct 1442 ms 66456 KB Output is correct
51 Correct 1462 ms 66456 KB Output is correct
52 Correct 1446 ms 66456 KB Output is correct
53 Correct 1441 ms 66584 KB Output is correct
54 Correct 1457 ms 66764 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1016 KB Output is correct
2 Correct 5 ms 1144 KB Output is correct
3 Correct 5 ms 1020 KB Output is correct
4 Correct 5 ms 1016 KB Output is correct
5 Correct 5 ms 1016 KB Output is correct
6 Correct 5 ms 1016 KB Output is correct
7 Correct 5 ms 1016 KB Output is correct
8 Correct 5 ms 1016 KB Output is correct
9 Correct 5 ms 1016 KB Output is correct
10 Correct 5 ms 1016 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 632 KB Output is correct
13 Correct 2 ms 632 KB Output is correct
14 Correct 2 ms 636 KB Output is correct
15 Correct 2 ms 632 KB Output is correct
16 Correct 2 ms 632 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 2 ms 632 KB Output is correct
19 Correct 2 ms 632 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 5 ms 1016 KB Output is correct
22 Correct 5 ms 1016 KB Output is correct
23 Correct 5 ms 1016 KB Output is correct
24 Correct 5 ms 1020 KB Output is correct
25 Correct 5 ms 1016 KB Output is correct
26 Correct 5 ms 1016 KB Output is correct
27 Correct 5 ms 1016 KB Output is correct
28 Correct 5 ms 1016 KB Output is correct
29 Correct 5 ms 1016 KB Output is correct
30 Correct 5 ms 1016 KB Output is correct
31 Correct 5 ms 1016 KB Output is correct
32 Correct 5 ms 1016 KB Output is correct
33 Correct 1471 ms 66520 KB Output is correct
34 Correct 1456 ms 66456 KB Output is correct
35 Correct 1461 ms 66544 KB Output is correct
36 Correct 1447 ms 66456 KB Output is correct
37 Correct 1456 ms 66456 KB Output is correct
38 Correct 1448 ms 66456 KB Output is correct
39 Correct 1453 ms 66456 KB Output is correct
40 Correct 1457 ms 66584 KB Output is correct
41 Correct 1454 ms 66584 KB Output is correct
42 Correct 1449 ms 66584 KB Output is correct
43 Correct 1460 ms 66584 KB Output is correct
44 Correct 1439 ms 66584 KB Output is correct
45 Correct 1442 ms 66584 KB Output is correct
46 Correct 1440 ms 66584 KB Output is correct
47 Correct 1448 ms 66584 KB Output is correct
48 Correct 1490 ms 66584 KB Output is correct
49 Correct 1452 ms 66584 KB Output is correct
50 Correct 1442 ms 66456 KB Output is correct
51 Correct 1462 ms 66456 KB Output is correct
52 Correct 1446 ms 66456 KB Output is correct
53 Correct 1441 ms 66584 KB Output is correct
54 Correct 1457 ms 66764 KB Output is correct
55 Correct 1447 ms 66564 KB Output is correct
56 Correct 1449 ms 66584 KB Output is correct
57 Correct 1467 ms 66584 KB Output is correct
58 Correct 1460 ms 66552 KB Output is correct
59 Correct 1449 ms 66620 KB Output is correct
60 Correct 1452 ms 66596 KB Output is correct
61 Correct 1457 ms 66584 KB Output is correct
62 Correct 1456 ms 66584 KB Output is correct
63 Correct 1461 ms 66520 KB Output is correct
64 Correct 1458 ms 66612 KB Output is correct
65 Correct 1452 ms 66584 KB Output is correct
66 Correct 1445 ms 66456 KB Output is correct
67 Correct 1457 ms 66584 KB Output is correct
68 Correct 1445 ms 66456 KB Output is correct
69 Correct 1451 ms 66584 KB Output is correct
70 Correct 1447 ms 66456 KB Output is correct
71 Correct 1461 ms 66584 KB Output is correct
72 Correct 1449 ms 66584 KB Output is correct
73 Correct 1458 ms 66512 KB Output is correct
74 Correct 1444 ms 66584 KB Output is correct

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1016 KB Output is correct
2 Correct 3 ms 1016 KB Output is correct
3 Correct 3 ms 1016 KB Output is correct
4 Correct 3 ms 1016 KB Output is correct
5 Correct 3 ms 1016 KB Output is correct
6 Correct 3 ms 1016 KB Output is correct
7 Correct 3 ms 996 KB Output is correct
8 Correct 4 ms 1016 KB Output is correct
9 Correct 3 ms 1016 KB Output is correct
10 Correct 3 ms 1016 KB Output is correct
11 Correct 2 ms 632 KB Output is correct
12 Correct 2 ms 632 KB Output is correct
13 Correct 2 ms 632 KB Output is correct
14 Correct 2 ms 632 KB Output is correct
15 Correct 2 ms 636 KB Output is correct
16 Correct 5 ms 1016 KB Output is correct
17 Correct 5 ms 1144 KB Output is correct
18 Correct 5 ms 1020 KB Output is correct
19 Correct 5 ms 1016 KB Output is correct
20 Correct 5 ms 1016 KB Output is correct
21 Correct 5 ms 1016 KB Output is correct
22 Correct 5 ms 1016 KB Output is correct
23 Correct 5 ms 1016 KB Output is correct
24 Correct 5 ms 1016 KB Output is correct
25 Correct 5 ms 1016 KB Output is correct
26 Correct 2 ms 504 KB Output is correct
27 Correct 2 ms 632 KB Output is correct
28 Correct 2 ms 632 KB Output is correct
29 Correct 2 ms 636 KB Output is correct
30 Correct 2 ms 632 KB Output is correct
31 Correct 2 ms 632 KB Output is correct
32 Correct 2 ms 504 KB Output is correct
33 Correct 2 ms 632 KB Output is correct
34 Correct 2 ms 632 KB Output is correct
35 Correct 2 ms 504 KB Output is correct
36 Correct 5 ms 1016 KB Output is correct
37 Correct 5 ms 1016 KB Output is correct
38 Correct 5 ms 1016 KB Output is correct
39 Correct 5 ms 1020 KB Output is correct
40 Correct 5 ms 1016 KB Output is correct
41 Correct 5 ms 1016 KB Output is correct
42 Correct 5 ms 1016 KB Output is correct
43 Correct 5 ms 1016 KB Output is correct
44 Correct 5 ms 1016 KB Output is correct
45 Correct 5 ms 1016 KB Output is correct
46 Correct 5 ms 1016 KB Output is correct
47 Correct 5 ms 1016 KB Output is correct
48 Correct 1471 ms 66520 KB Output is correct
49 Correct 1456 ms 66456 KB Output is correct
50 Correct 1461 ms 66544 KB Output is correct
51 Correct 1447 ms 66456 KB Output is correct
52 Correct 1456 ms 66456 KB Output is correct
53 Correct 1448 ms 66456 KB Output is correct
54 Correct 1453 ms 66456 KB Output is correct
55 Correct 1457 ms 66584 KB Output is correct
56 Correct 1454 ms 66584 KB Output is correct
57 Correct 1449 ms 66584 KB Output is correct
58 Correct 1460 ms 66584 KB Output is correct
59 Correct 1439 ms 66584 KB Output is correct
60 Correct 1442 ms 66584 KB Output is correct
61 Correct 1440 ms 66584 KB Output is correct
62 Correct 1448 ms 66584 KB Output is correct
63 Correct 1490 ms 66584 KB Output is correct
64 Correct 1452 ms 66584 KB Output is correct
65 Correct 1442 ms 66456 KB Output is correct
66 Correct 1462 ms 66456 KB Output is correct
67 Correct 1446 ms 66456 KB Output is correct
68 Correct 1441 ms 66584 KB Output is correct
69 Correct 1457 ms 66764 KB Output is correct
70 Correct 1447 ms 66564 KB Output is correct
71 Correct 1449 ms 66584 KB Output is correct
72 Correct 1467 ms 66584 KB Output is correct
73 Correct 1460 ms 66552 KB Output is correct
74 Correct 1449 ms 66620 KB Output is correct
75 Correct 1452 ms 66596 KB Output is correct
76 Correct 1457 ms 66584 KB Output is correct
77 Correct 1456 ms 66584 KB Output is correct
78 Correct 1461 ms 66520 KB Output is correct
79 Correct 1458 ms 66612 KB Output is correct
80 Correct 1452 ms 66584 KB Output is correct
81 Correct 1445 ms 66456 KB Output is correct
82 Correct 1457 ms 66584 KB Output is correct
83 Correct 1445 ms 66456 KB Output is correct
84 Correct 1451 ms 66584 KB Output is correct
85 Correct 1447 ms 66456 KB Output is correct
86 Correct 1461 ms 66584 KB Output is correct
87 Correct 1449 ms 66584 KB Output is correct
88 Correct 1458 ms 66512 KB Output is correct
89 Correct 1444 ms 66584 KB Output is correct
90 Correct 1462 ms 66752 KB Output is correct
91 Correct 1443 ms 66584 KB Output is correct
92 Correct 1459 ms 66504 KB Output is correct
93 Correct 1448 ms 66584 KB Output is correct
94 Correct 1450 ms 66620 KB Output is correct
95 Correct 1442 ms 66588 KB Output is correct
96 Correct 1453 ms 66596 KB Output is correct
97 Correct 1458 ms 66584 KB Output is correct
98 Correct 1445 ms 66556 KB Output is correct
99 Correct 1453 ms 66460 KB Output is correct
100 Incorrect 624 ms 95444 KB Output isn't correct
101 Halted 0 ms 0 KB -