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답안 #1078835

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1078835 2024-08-28T06:53:47 Z vnm06 Bulldozer (JOI17_bulldozer) C++14
80 / 100
 1321 ms 251312 KB 
#include<bits/stdc++.h>
#define endl '\n'

using namespace std;

struct Point
{
    long long x, y, val, nom;
    Point() {}
    Point(long long a, long long b, long long c, long long d)
    {
        x=a;
        y=b;
        val=c;
        nom=d;
    }
};

bool operator<(Point p, Point q)
{
    if(p.x==q.x) return p.y>q.y;
    return p.x<q.x;
}

struct Line
{
    Point a, b;
    Line() {}
    Line(Point p, Point q)
    {
        a.x=p.x;
        a.y=p.y;
        a.val=p.val;
        a.nom=p.nom;
        b.x=q.x;
        b.y=q.y;
        b.val=q.val;
        b.nom=q.nom;
    }
};

bool cmp(Line p, Line q)
{
    if(p.a.x==p.b.x && q.a.x==q.b.x) return (p.b.y-p.a.y) > (q.b.y-q.a.y);
    if(p.a.x==p.b.x) return 1;
    if(q.a.x==q.b.x) return 0;
    if(((p.b.y-p.a.y) * (q.b.x-q.a.x)) == ((q.b.y-q.a.y) * (p.b.x-p.a.x))) return (p.b.x-p.a.x) > (q.b.x-q.a.x);
    return ((p.b.y-p.a.y) * (q.b.x-q.a.x)) < ((q.b.y-q.a.y) * (p.b.x-p.a.x));
}

bool operator==(Line p, Line q)
{
    return ((p.b.y-p.a.y) * (q.b.x-q.a.x)) == ((q.b.y-q.a.y) * (p.b.x-p.a.x));
}

int n, brl=0;
int pos[2005];
Point P[2005];

vector<Line> L;

long long ans=0;
long long A[2005];

void solve()
{
    long long res=0;
    for(long long i=0; i<n; i++)
    {
        res+=A[i];
        if(res<0) res=0;
        if(res>ans) ans=res;
    }
}

long long sum[8005], pref[8005], suf[8005], mx[8005];

void update(int v, int le, int ri, int id, long long val)
{
    if(le==ri)
    {
        sum[v]=val;
        pref[v]=max(sum[v], 0LL);
        suf[v]=max(sum[v], 0LL);
        mx[v]=max(sum[v], 0LL);
        return;
    }
    int mid=(le+ri)/2;
    if(id<=mid) update(2*v, le, mid, id, val);
    else update(2*v+1, mid+1, ri, id, val);

    sum[v]=sum[2*v]+sum[2*v+1];
    pref[v]=max(pref[2*v], sum[2*v]+pref[2*v+1]);
    suf[v]=max(suf[2*v+1], suf[2*v]+sum[2*v+1]);
    mx[v]=max(max(mx[2*v], mx[2*v+1]), suf[2*v]+pref[2*v+1]);
}

bool nepip[2005];
vector<int> upd;

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin>>n;
    for(long long i=0; i<n; i++) cin>>P[i].x>>P[i].y>>P[i].val;
    sort(P, P+n);
    for(long long i=0; i<n; i++) P[i].nom=i;
    for(long long i=0; i<n; i++)
    {
        A[i]=P[i].val;
        pos[i]=i;
        for(long long j=i+1; j<n; j++)
        {
            L.push_back(Line(P[i], P[j]));
            ///cout<<L[brl].a.x<<" "<<L[brl].a.y<<" "<<L[brl].b.x<<" "<<L[brl].b.y<<"\n";
            brl++;
        }
    }
    ///cout<<brl<<endl;
    stable_sort(L.begin(), L.end(), cmp);

    for(int i=0; i<n; i++)
    {
        update(1, 0, n-1, i, A[i]);
    }

    for(long long i=0; i<brl; i++)
    {
        if(i==0 || !(L[i]==L[i-1])) 
        {
            ans=max(ans, mx[1]);
            for(int j=0; j<upd.size(); j++) nepip[upd[j]]=0;
            upd.resize(0);
        }
        Point t1=L[i].a, t2=L[i].b;
        if(nepip[pos[t1.nom]] || nepip[pos[t2.nom]]) continue;
        update(1, 0, n-1, pos[t2.nom], A[pos[t1.nom]]);
        update(1, 0, n-1, pos[t1.nom], A[pos[t2.nom]]);
        swap(A[pos[t1.nom]], A[pos[t2.nom]]);
        swap(pos[t1.nom], pos[t2.nom]);
        nepip[pos[t1.nom]]=1;
        nepip[pos[t2.nom]]=1;
        upd.push_back(pos[t1.nom]);
        upd.push_back(pos[t2.nom]);
    }
    ans=max(ans, mx[1]);
    cout<<ans<<endl;
    return 0;
}

Compilation message

bulldozer.cpp: In function 'int main()':
bulldozer.cpp:135:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  135 |             for(int j=0; j<upd.size(); j++) nepip[upd[j]]=0;
      |                          ~^~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 1240 KB Output is correct
2 Correct 1 ms 1244 KB Output is correct
3 Correct 1 ms 1244 KB Output is correct
4 Correct 1 ms 1244 KB Output is correct
5 Correct 2 ms 1244 KB Output is correct
6 Correct 1 ms 1244 KB Output is correct
7 Correct 1 ms 1244 KB Output is correct
8 Correct 1 ms 1244 KB Output is correct
9 Correct 2 ms 1244 KB Output is correct
10 Correct 1 ms 1264 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 1244 KB Output is correct
2 Correct 3 ms 1244 KB Output is correct
3 Correct 2 ms 1244 KB Output is correct
4 Correct 2 ms 1240 KB Output is correct
5 Correct 3 ms 1496 KB Output is correct
6 Correct 2 ms 1244 KB Output is correct
7 Correct 2 ms 1244 KB Output is correct
8 Correct 2 ms 1240 KB Output is correct
9 Correct 2 ms 1244 KB Output is correct
10 Correct 2 ms 1244 KB Output is correct
11 Correct 0 ms 476 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 600 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 2 ms 1244 KB Output is correct
22 Correct 2 ms 1244 KB Output is correct
23 Correct 2 ms 1244 KB Output is correct
24 Correct 3 ms 1244 KB Output is correct
25 Correct 2 ms 1244 KB Output is correct
26 Correct 2 ms 1244 KB Output is correct
27 Correct 2 ms 1244 KB Output is correct
28 Correct 2 ms 1244 KB Output is correct
29 Correct 2 ms 1244 KB Output is correct
30 Correct 2 ms 1112 KB Output is correct
31 Correct 2 ms 1244 KB Output is correct
32 Correct 2 ms 992 KB Output is correct

Subtask #3
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 1244 KB Output is correct
2 Correct 3 ms 1244 KB Output is correct
3 Correct 2 ms 1244 KB Output is correct
4 Correct 2 ms 1240 KB Output is correct
5 Correct 3 ms 1496 KB Output is correct
6 Correct 2 ms 1244 KB Output is correct
7 Correct 2 ms 1244 KB Output is correct
8 Correct 2 ms 1240 KB Output is correct
9 Correct 2 ms 1244 KB Output is correct
10 Correct 2 ms 1244 KB Output is correct
11 Correct 0 ms 476 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 600 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 2 ms 1244 KB Output is correct
22 Correct 2 ms 1244 KB Output is correct
23 Correct 2 ms 1244 KB Output is correct
24 Correct 3 ms 1244 KB Output is correct
25 Correct 2 ms 1244 KB Output is correct
26 Correct 2 ms 1244 KB Output is correct
27 Correct 2 ms 1244 KB Output is correct
28 Correct 2 ms 1244 KB Output is correct
29 Correct 2 ms 1244 KB Output is correct
30 Correct 2 ms 1112 KB Output is correct
31 Correct 2 ms 1244 KB Output is correct
32 Correct 2 ms 992 KB Output is correct
33 Correct 1174 ms 250896 KB Output is correct
34 Correct 1144 ms 250976 KB Output is correct
35 Correct 1142 ms 250928 KB Output is correct
36 Correct 1192 ms 251064 KB Output is correct
37 Correct 1170 ms 251056 KB Output is correct
38 Correct 1165 ms 251056 KB Output is correct
39 Correct 1175 ms 251064 KB Output is correct
40 Correct 1221 ms 251052 KB Output is correct
41 Correct 1176 ms 251012 KB Output is correct
42 Correct 1179 ms 251052 KB Output is correct
43 Correct 1144 ms 251008 KB Output is correct
44 Correct 1165 ms 251060 KB Output is correct
45 Correct 1180 ms 250904 KB Output is correct
46 Correct 1165 ms 251056 KB Output is correct
47 Correct 1176 ms 251312 KB Output is correct
48 Correct 1180 ms 251056 KB Output is correct
49 Correct 1146 ms 251056 KB Output is correct
50 Correct 1156 ms 251060 KB Output is correct
51 Correct 1141 ms 251056 KB Output is correct
52 Correct 1245 ms 250956 KB Output is correct
53 Correct 1134 ms 250972 KB Output is correct
54 Correct 1159 ms 251056 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 1244 KB Output is correct
2 Correct 3 ms 1244 KB Output is correct
3 Correct 2 ms 1244 KB Output is correct
4 Correct 2 ms 1240 KB Output is correct
5 Correct 3 ms 1496 KB Output is correct
6 Correct 2 ms 1244 KB Output is correct
7 Correct 2 ms 1244 KB Output is correct
8 Correct 2 ms 1240 KB Output is correct
9 Correct 2 ms 1244 KB Output is correct
10 Correct 2 ms 1244 KB Output is correct
11 Correct 0 ms 476 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 600 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 2 ms 1244 KB Output is correct
22 Correct 2 ms 1244 KB Output is correct
23 Correct 2 ms 1244 KB Output is correct
24 Correct 3 ms 1244 KB Output is correct
25 Correct 2 ms 1244 KB Output is correct
26 Correct 2 ms 1244 KB Output is correct
27 Correct 2 ms 1244 KB Output is correct
28 Correct 2 ms 1244 KB Output is correct
29 Correct 2 ms 1244 KB Output is correct
30 Correct 2 ms 1112 KB Output is correct
31 Correct 2 ms 1244 KB Output is correct
32 Correct 2 ms 992 KB Output is correct
33 Correct 1174 ms 250896 KB Output is correct
34 Correct 1144 ms 250976 KB Output is correct
35 Correct 1142 ms 250928 KB Output is correct
36 Correct 1192 ms 251064 KB Output is correct
37 Correct 1170 ms 251056 KB Output is correct
38 Correct 1165 ms 251056 KB Output is correct
39 Correct 1175 ms 251064 KB Output is correct
40 Correct 1221 ms 251052 KB Output is correct
41 Correct 1176 ms 251012 KB Output is correct
42 Correct 1179 ms 251052 KB Output is correct
43 Correct 1144 ms 251008 KB Output is correct
44 Correct 1165 ms 251060 KB Output is correct
45 Correct 1180 ms 250904 KB Output is correct
46 Correct 1165 ms 251056 KB Output is correct
47 Correct 1176 ms 251312 KB Output is correct
48 Correct 1180 ms 251056 KB Output is correct
49 Correct 1146 ms 251056 KB Output is correct
50 Correct 1156 ms 251060 KB Output is correct
51 Correct 1141 ms 251056 KB Output is correct
52 Correct 1245 ms 250956 KB Output is correct
53 Correct 1134 ms 250972 KB Output is correct
54 Correct 1159 ms 251056 KB Output is correct
55 Correct 1168 ms 250924 KB Output is correct
56 Correct 1159 ms 251060 KB Output is correct
57 Correct 1179 ms 251060 KB Output is correct
58 Correct 1194 ms 251060 KB Output is correct
59 Correct 1174 ms 250956 KB Output is correct
60 Correct 1175 ms 251056 KB Output is correct
61 Correct 1162 ms 250980 KB Output is correct
62 Correct 1174 ms 250924 KB Output is correct
63 Correct 1181 ms 251056 KB Output is correct
64 Correct 1158 ms 251056 KB Output is correct
65 Correct 1188 ms 250868 KB Output is correct
66 Correct 1150 ms 251060 KB Output is correct
67 Correct 1168 ms 250892 KB Output is correct
68 Correct 1183 ms 251056 KB Output is correct
69 Correct 1205 ms 251032 KB Output is correct
70 Correct 1216 ms 251056 KB Output is correct
71 Correct 1191 ms 251060 KB Output is correct
72 Correct 1179 ms 251072 KB Output is correct
73 Correct 1164 ms 251056 KB Output is correct
74 Correct 1196 ms 251060 KB Output is correct

Subtask #5
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 1240 KB Output is correct
2 Correct 1 ms 1244 KB Output is correct
3 Correct 1 ms 1244 KB Output is correct
4 Correct 1 ms 1244 KB Output is correct
5 Correct 2 ms 1244 KB Output is correct
6 Correct 1 ms 1244 KB Output is correct
7 Correct 1 ms 1244 KB Output is correct
8 Correct 1 ms 1244 KB Output is correct
9 Correct 2 ms 1244 KB Output is correct
10 Correct 1 ms 1264 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 2 ms 1244 KB Output is correct
17 Correct 3 ms 1244 KB Output is correct
18 Correct 2 ms 1244 KB Output is correct
19 Correct 2 ms 1240 KB Output is correct
20 Correct 3 ms 1496 KB Output is correct
21 Correct 2 ms 1244 KB Output is correct
22 Correct 2 ms 1244 KB Output is correct
23 Correct 2 ms 1240 KB Output is correct
24 Correct 2 ms 1244 KB Output is correct
25 Correct 2 ms 1244 KB Output is correct
26 Correct 0 ms 476 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 600 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 2 ms 1244 KB Output is correct
37 Correct 2 ms 1244 KB Output is correct
38 Correct 2 ms 1244 KB Output is correct
39 Correct 3 ms 1244 KB Output is correct
40 Correct 2 ms 1244 KB Output is correct
41 Correct 2 ms 1244 KB Output is correct
42 Correct 2 ms 1244 KB Output is correct
43 Correct 2 ms 1244 KB Output is correct
44 Correct 2 ms 1244 KB Output is correct
45 Correct 2 ms 1112 KB Output is correct
46 Correct 2 ms 1244 KB Output is correct
47 Correct 2 ms 992 KB Output is correct
48 Correct 1174 ms 250896 KB Output is correct
49 Correct 1144 ms 250976 KB Output is correct
50 Correct 1142 ms 250928 KB Output is correct
51 Correct 1192 ms 251064 KB Output is correct
52 Correct 1170 ms 251056 KB Output is correct
53 Correct 1165 ms 251056 KB Output is correct
54 Correct 1175 ms 251064 KB Output is correct
55 Correct 1221 ms 251052 KB Output is correct
56 Correct 1176 ms 251012 KB Output is correct
57 Correct 1179 ms 251052 KB Output is correct
58 Correct 1144 ms 251008 KB Output is correct
59 Correct 1165 ms 251060 KB Output is correct
60 Correct 1180 ms 250904 KB Output is correct
61 Correct 1165 ms 251056 KB Output is correct
62 Correct 1176 ms 251312 KB Output is correct
63 Correct 1180 ms 251056 KB Output is correct
64 Correct 1146 ms 251056 KB Output is correct
65 Correct 1156 ms 251060 KB Output is correct
66 Correct 1141 ms 251056 KB Output is correct
67 Correct 1245 ms 250956 KB Output is correct
68 Correct 1134 ms 250972 KB Output is correct
69 Correct 1159 ms 251056 KB Output is correct
70 Correct 1168 ms 250924 KB Output is correct
71 Correct 1159 ms 251060 KB Output is correct
72 Correct 1179 ms 251060 KB Output is correct
73 Correct 1194 ms 251060 KB Output is correct
74 Correct 1174 ms 250956 KB Output is correct
75 Correct 1175 ms 251056 KB Output is correct
76 Correct 1162 ms 250980 KB Output is correct
77 Correct 1174 ms 250924 KB Output is correct
78 Correct 1181 ms 251056 KB Output is correct
79 Correct 1158 ms 251056 KB Output is correct
80 Correct 1188 ms 250868 KB Output is correct
81 Correct 1150 ms 251060 KB Output is correct
82 Correct 1168 ms 250892 KB Output is correct
83 Correct 1183 ms 251056 KB Output is correct
84 Correct 1205 ms 251032 KB Output is correct
85 Correct 1216 ms 251056 KB Output is correct
86 Correct 1191 ms 251060 KB Output is correct
87 Correct 1179 ms 251072 KB Output is correct
88 Correct 1164 ms 251056 KB Output is correct
89 Correct 1196 ms 251060 KB Output is correct
90 Correct 1194 ms 251060 KB Output is correct
91 Correct 1210 ms 251060 KB Output is correct
92 Correct 1321 ms 251060 KB Output is correct
93 Correct 1183 ms 251052 KB Output is correct
94 Correct 1171 ms 251064 KB Output is correct
95 Correct 1190 ms 250900 KB Output is correct
96 Correct 1174 ms 251072 KB Output is correct
97 Correct 1206 ms 251056 KB Output is correct
98 Correct 1181 ms 250976 KB Output is correct
99 Correct 1200 ms 251060 KB Output is correct
100 Incorrect 816 ms 251060 KB Output isn't correct
101 Halted 0 ms 0 KB -