oj.uz

답안 #127561

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
127561 2019-07-09T15:03:43 Z arnold518 Bulldozer (JOI17_bulldozer) C++14
75 / 100
 1367 ms 50128 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;
    int m1, m2;
};

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

ll val[4*MAXN+10], lsum[4*MAXN+10], rsum[4*MAXN+10], sum[4*MAXN+10];

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

    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];
    val[node]=max(rsum[node*2]+lsum[node*2+1], max(val[node*2], val[node*2+1]));
}

ll query() { return val[1]; }

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;
        update(1, 1, n, i, mine[i].w);
    }
    ans=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, 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)
        {
            return q.x*p.y<p.x*q.y;
        });

    for(i=0; i<L.size(); )
    {
        ll x=L[i].x, y=L[i].y;
        while(i<L.size() && L[i].x*y==L[i].y*x)
        {
            int m1=L[i].m1, m2=L[i].m2;
            update(1, 1, n, pos[m1], mine[m2].w);
            update(1, 1, n, pos[m2], mine[m1].w);
            swap(pos[m1], pos[m2]);
            i++;
        }
        ans=max(ans, query());
    }
    printf("%lld", ans);
}

Compilation message

bulldozer.cpp: In function 'void update(int, int, int, int, ll)':
bulldozer.cpp:38:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     int mid=tl+tr>>1;
             ~~^~~
bulldozer.cpp: In function 'int main()':
bulldozer.cpp:83:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(i=0; i<L.size(); )
              ~^~~~~~~~~
bulldozer.cpp:86:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         while(i<L.size() && L[i].x*y==L[i].y*x)
               ~^~~~~~~~~
bulldozer.cpp:54:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
bulldozer.cpp:55:30: 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 4 ms 632 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 4 ms 632 KB Output is correct
2 Correct 4 ms 632 KB Output is correct
3 Correct 4 ms 636 KB Output is correct
4 Correct 4 ms 632 KB Output is correct
5 Correct 4 ms 696 KB Output is correct
6 Correct 4 ms 632 KB Output is correct
7 Correct 4 ms 632 KB Output is correct
8 Correct 4 ms 632 KB Output is correct
9 Correct 4 ms 632 KB Output is correct
10 Correct 4 ms 632 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 380 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 380 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 4 ms 636 KB Output is correct
22 Correct 4 ms 632 KB Output is correct
23 Correct 5 ms 632 KB Output is correct
24 Correct 5 ms 632 KB Output is correct
25 Correct 4 ms 632 KB Output is correct
26 Correct 4 ms 632 KB Output is correct
27 Correct 4 ms 632 KB Output is correct
28 Correct 4 ms 632 KB Output is correct
29 Correct 4 ms 632 KB Output is correct
30 Correct 4 ms 632 KB Output is correct
31 Correct 4 ms 632 KB Output is correct
32 Correct 4 ms 632 KB Output is correct

Subtask #3
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 632 KB Output is correct
2 Correct 4 ms 632 KB Output is correct
3 Correct 4 ms 636 KB Output is correct
4 Correct 4 ms 632 KB Output is correct
5 Correct 4 ms 696 KB Output is correct
6 Correct 4 ms 632 KB Output is correct
7 Correct 4 ms 632 KB Output is correct
8 Correct 4 ms 632 KB Output is correct
9 Correct 4 ms 632 KB Output is correct
10 Correct 4 ms 632 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 380 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 380 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 4 ms 636 KB Output is correct
22 Correct 4 ms 632 KB Output is correct
23 Correct 5 ms 632 KB Output is correct
24 Correct 5 ms 632 KB Output is correct
25 Correct 4 ms 632 KB Output is correct
26 Correct 4 ms 632 KB Output is correct
27 Correct 4 ms 632 KB Output is correct
28 Correct 4 ms 632 KB Output is correct
29 Correct 4 ms 632 KB Output is correct
30 Correct 4 ms 632 KB Output is correct
31 Correct 4 ms 632 KB Output is correct
32 Correct 4 ms 632 KB Output is correct
33 Correct 1319 ms 50008 KB Output is correct
34 Correct 1293 ms 49964 KB Output is correct
35 Correct 1333 ms 49964 KB Output is correct
36 Correct 1310 ms 50096 KB Output is correct
37 Correct 1319 ms 49968 KB Output is correct
38 Correct 1312 ms 49964 KB Output is correct
39 Correct 1310 ms 50092 KB Output is correct
40 Correct 1305 ms 50000 KB Output is correct
41 Correct 1321 ms 49964 KB Output is correct
42 Correct 1311 ms 49968 KB Output is correct
43 Correct 1303 ms 49936 KB Output is correct
44 Correct 1314 ms 49964 KB Output is correct
45 Correct 1299 ms 49964 KB Output is correct
46 Correct 1325 ms 50092 KB Output is correct
47 Correct 1292 ms 49964 KB Output is correct
48 Correct 1312 ms 49964 KB Output is correct
49 Correct 1334 ms 49964 KB Output is correct
50 Correct 1291 ms 49964 KB Output is correct
51 Correct 1316 ms 50092 KB Output is correct
52 Correct 1314 ms 49964 KB Output is correct
53 Correct 1294 ms 49964 KB Output is correct
54 Correct 1307 ms 49968 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 632 KB Output is correct
2 Correct 4 ms 632 KB Output is correct
3 Correct 4 ms 636 KB Output is correct
4 Correct 4 ms 632 KB Output is correct
5 Correct 4 ms 696 KB Output is correct
6 Correct 4 ms 632 KB Output is correct
7 Correct 4 ms 632 KB Output is correct
8 Correct 4 ms 632 KB Output is correct
9 Correct 4 ms 632 KB Output is correct
10 Correct 4 ms 632 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 380 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 380 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 4 ms 636 KB Output is correct
22 Correct 4 ms 632 KB Output is correct
23 Correct 5 ms 632 KB Output is correct
24 Correct 5 ms 632 KB Output is correct
25 Correct 4 ms 632 KB Output is correct
26 Correct 4 ms 632 KB Output is correct
27 Correct 4 ms 632 KB Output is correct
28 Correct 4 ms 632 KB Output is correct
29 Correct 4 ms 632 KB Output is correct
30 Correct 4 ms 632 KB Output is correct
31 Correct 4 ms 632 KB Output is correct
32 Correct 4 ms 632 KB Output is correct
33 Correct 1319 ms 50008 KB Output is correct
34 Correct 1293 ms 49964 KB Output is correct
35 Correct 1333 ms 49964 KB Output is correct
36 Correct 1310 ms 50096 KB Output is correct
37 Correct 1319 ms 49968 KB Output is correct
38 Correct 1312 ms 49964 KB Output is correct
39 Correct 1310 ms 50092 KB Output is correct
40 Correct 1305 ms 50000 KB Output is correct
41 Correct 1321 ms 49964 KB Output is correct
42 Correct 1311 ms 49968 KB Output is correct
43 Correct 1303 ms 49936 KB Output is correct
44 Correct 1314 ms 49964 KB Output is correct
45 Correct 1299 ms 49964 KB Output is correct
46 Correct 1325 ms 50092 KB Output is correct
47 Correct 1292 ms 49964 KB Output is correct
48 Correct 1312 ms 49964 KB Output is correct
49 Correct 1334 ms 49964 KB Output is correct
50 Correct 1291 ms 49964 KB Output is correct
51 Correct 1316 ms 50092 KB Output is correct
52 Correct 1314 ms 49964 KB Output is correct
53 Correct 1294 ms 49964 KB Output is correct
54 Correct 1307 ms 49968 KB Output is correct
55 Correct 1367 ms 49964 KB Output is correct
56 Correct 1326 ms 50100 KB Output is correct
57 Correct 1313 ms 49964 KB Output is correct
58 Correct 1330 ms 49964 KB Output is correct
59 Correct 1305 ms 49960 KB Output is correct
60 Correct 1324 ms 49964 KB Output is correct
61 Correct 1303 ms 49964 KB Output is correct
62 Correct 1329 ms 49964 KB Output is correct
63 Correct 1316 ms 49964 KB Output is correct
64 Correct 1302 ms 50128 KB Output is correct
65 Correct 1304 ms 49964 KB Output is correct
66 Correct 1325 ms 49964 KB Output is correct
67 Correct 1296 ms 49964 KB Output is correct
68 Correct 1321 ms 49964 KB Output is correct
69 Correct 1312 ms 49960 KB Output is correct
70 Correct 1317 ms 49964 KB Output is correct
71 Correct 1318 ms 50096 KB Output is correct
72 Correct 1302 ms 49964 KB Output is correct
73 Correct 1312 ms 49964 KB Output is correct
74 Correct 1316 ms 50116 KB Output is correct

Subtask #5
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 4 ms 632 KB Output isn't correct
2 Halted 0 ms 0 KB -