oj.uz

답안 #125727

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
125727 2019-07-06T09:30:48 Z arnold518 Bulldozer (JOI17_bulldozer) C++14
75 / 100
 1435 ms 66740 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);
                i++;
            }
            todo.push_back(L[i-1].m2);
            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:113:23: 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
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 1016 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 1016 KB Output is correct
2 Correct 5 ms 1016 KB Output is correct
3 Correct 5 ms 948 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 632 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 764 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 3 ms 632 KB Output is correct
16 Correct 2 ms 504 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 2 ms 504 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 1016 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 4 ms 1016 KB Output is correct

Subtask #3
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 1016 KB Output is correct
2 Correct 5 ms 1016 KB Output is correct
3 Correct 5 ms 948 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 632 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 764 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 3 ms 632 KB Output is correct
16 Correct 2 ms 504 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 2 ms 504 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 1016 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 4 ms 1016 KB Output is correct
33 Correct 1424 ms 66584 KB Output is correct
34 Correct 1407 ms 66740 KB Output is correct
35 Correct 1420 ms 66584 KB Output is correct
36 Correct 1411 ms 66584 KB Output is correct
37 Correct 1410 ms 66556 KB Output is correct
38 Correct 1413 ms 66584 KB Output is correct
39 Correct 1416 ms 66456 KB Output is correct
40 Correct 1416 ms 66456 KB Output is correct
41 Correct 1422 ms 66456 KB Output is correct
42 Correct 1418 ms 66584 KB Output is correct
43 Correct 1410 ms 66584 KB Output is correct
44 Correct 1396 ms 66584 KB Output is correct
45 Correct 1400 ms 66584 KB Output is correct
46 Correct 1399 ms 66584 KB Output is correct
47 Correct 1409 ms 66584 KB Output is correct
48 Correct 1413 ms 66588 KB Output is correct
49 Correct 1403 ms 66584 KB Output is correct
50 Correct 1407 ms 66576 KB Output is correct
51 Correct 1400 ms 66556 KB Output is correct
52 Correct 1400 ms 66456 KB Output is correct
53 Correct 1397 ms 66584 KB Output is correct
54 Correct 1404 ms 66584 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 1016 KB Output is correct
2 Correct 5 ms 1016 KB Output is correct
3 Correct 5 ms 948 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 632 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 764 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 3 ms 632 KB Output is correct
16 Correct 2 ms 504 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 2 ms 504 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 1016 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 4 ms 1016 KB Output is correct
33 Correct 1424 ms 66584 KB Output is correct
34 Correct 1407 ms 66740 KB Output is correct
35 Correct 1420 ms 66584 KB Output is correct
36 Correct 1411 ms 66584 KB Output is correct
37 Correct 1410 ms 66556 KB Output is correct
38 Correct 1413 ms 66584 KB Output is correct
39 Correct 1416 ms 66456 KB Output is correct
40 Correct 1416 ms 66456 KB Output is correct
41 Correct 1422 ms 66456 KB Output is correct
42 Correct 1418 ms 66584 KB Output is correct
43 Correct 1410 ms 66584 KB Output is correct
44 Correct 1396 ms 66584 KB Output is correct
45 Correct 1400 ms 66584 KB Output is correct
46 Correct 1399 ms 66584 KB Output is correct
47 Correct 1409 ms 66584 KB Output is correct
48 Correct 1413 ms 66588 KB Output is correct
49 Correct 1403 ms 66584 KB Output is correct
50 Correct 1407 ms 66576 KB Output is correct
51 Correct 1400 ms 66556 KB Output is correct
52 Correct 1400 ms 66456 KB Output is correct
53 Correct 1397 ms 66584 KB Output is correct
54 Correct 1404 ms 66584 KB Output is correct
55 Correct 1414 ms 66644 KB Output is correct
56 Correct 1410 ms 66588 KB Output is correct
57 Correct 1418 ms 66584 KB Output is correct
58 Correct 1417 ms 66584 KB Output is correct
59 Correct 1410 ms 66516 KB Output is correct
60 Correct 1412 ms 66584 KB Output is correct
61 Correct 1422 ms 66556 KB Output is correct
62 Correct 1419 ms 66548 KB Output is correct
63 Correct 1429 ms 66584 KB Output is correct
64 Correct 1410 ms 66504 KB Output is correct
65 Correct 1425 ms 66456 KB Output is correct
66 Correct 1415 ms 66560 KB Output is correct
67 Correct 1402 ms 66456 KB Output is correct
68 Correct 1417 ms 66600 KB Output is correct
69 Correct 1429 ms 66456 KB Output is correct
70 Correct 1435 ms 66456 KB Output is correct
71 Correct 1415 ms 66452 KB Output is correct
72 Correct 1414 ms 66584 KB Output is correct
73 Correct 1424 ms 66544 KB Output is correct
74 Correct 1421 ms 66552 KB Output is correct

Subtask #5
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 1016 KB Output isn't correct
2 Halted 0 ms 0 KB -