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답안 #1099365

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1099365 2024-10-11T08:45:42 Z Zero_OP Drawing (CEOI22_drawing) C++14
100 / 100
 150 ms 38596 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
#define all(v) begin(v), end(v)
#define compact(v) v.erase(unique(all(v)), end(v))
#define sz(v) (int)v.size()
#define dbg(x) "[" #x " = " << (x) << "]"
 
using ll = long long;
using ld = long double;
 
template<typename T>
bool minimize(T& a, const T& b){
    if(a > b) return a = b, true; return false;
}
 
template<typename T>
bool maximize(T& a, const T& b){
    if(a < b) return a = b, true; return false;
}
 
struct point{
    int x, y;
    point(int x = 0, int y = 0) : x(x), y(y) {}
 
    friend istream& operator >> (istream& in, point& p){ return in >> p.x >> p.y; }
};
 
ll cross(const point& a, const point& b, const point& c){
    ll x1 = b.x - a.x, x2 = c.x - a.x;
    ll y1 = b.y - a.y, y2 = c.y - a.y;
    return x1 * y2 - x2 * y1;
}
 
bool ccw(const point& a, const point& b, const point& c){
    return cross(a, b, c) > 0;
}
 
const int MAX = 2e5 + 5;
 
int n, answer[MAX], ptr;
point points[MAX];
vector<int> adj[MAX], on;
 
int sz[MAX];
 
int predfs(int u){
    sz[u] = 1;
    for(int v : adj[u]){
        adj[v].erase(find(all(adj[v]), u));
        sz[u] += predfs(v);
    }
    return sz[u];
}
 
int select_root(){
    for(int i = 1; i <= n; ++i){
        if(sz(adj[i]) < 3){
            return i;
        }
    }
    assert(false);
}
 
int select_point(){
    int best = 1;
    for(int i = 2; i <= n; ++i){
        if(points[best].x > points[i].x || (points[best].x == points[i].x && points[best].y > points[i].y)){
            best = i;
        }
    }
 
    return best;
}
 
int root_of_points;
bool comparator(int u, int v){
    return ccw(points[root_of_points], points[u], points[v]);
}

void dfs(int u){
   // cout << u << '\n';
    for(int v : adj[u]){
        answer[on[ptr++]] = v;
        dfs(v);
    }
}
 
void solve(int u, int last_id, vector<int>& id_points){
    if(sz(adj[u]) == 0) return;
 
    root_of_points = last_id;
    sort(all(id_points), comparator);
 
    if(sz(adj[u]) == 1){
        int v = adj[u][0], nxt = id_points.back();
        answer[nxt] = v;
        id_points.pop_back();
        solve(v, nxt, id_points);
    } else{
        int v1 = adj[u][1];
        int v2 = adj[u][0];
 
        vector<int> left_id_points, right_id_points;
        for(int i = 0; i < sz[v1]; ++i){
            left_id_points.push_back(id_points[i]);
        }
 
        for(int i = sz[v1]; i < sz[u] - 1; ++i){
            right_id_points.push_back(id_points[i]);
        }
 
        int nxt1 = left_id_points.back();
        int nxt2 = right_id_points.back();
        answer[nxt1] = v1;
        answer[nxt2] = v2;
 
        left_id_points.pop_back();
        right_id_points.pop_back();
 
        solve(v1, nxt1, left_id_points);
        solve(v2, nxt2, right_id_points);
    }
}
 
int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
 
    #define filename "task"
    if(fopen(filename".inp", "r")){
        freopen(filename".inp", "r", stdin);
        freopen(filename".out", "w", stdout);
    }
 
    cin >> n;
    for(int i = 1; i < n; ++i){
        int u, v;
        cin >> u >> v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
 
    for(int i = 1; i <= n; ++i){
        cin >> points[i];
    }
 
    int r = select_root();
    int id = select_point();
 
    for(int i = 1; i <= n; ++i){
        if(i != id) on.push_back(i);
    }
 
    predfs(r);
    root_of_points = r;
    sort(all(on), comparator);
    answer[id] = r;

    ptr = 0;
    dfs(r);
 
    for(int i = 1; i <= n; ++i){
        cout << answer[i] << ' ';
    }
 
    return 0;
}

Compilation message

Main.cpp: In function 'bool minimize(T&, const T&)':
Main.cpp:15:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   15 |     if(a > b) return a = b, true; return false;
      |     ^~
Main.cpp:15:35: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   15 |     if(a > b) return a = b, true; return false;
      |                                   ^~~~~~
Main.cpp: In function 'bool maximize(T&, const T&)':
Main.cpp:20:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   20 |     if(a < b) return a = b, true; return false;
      |     ^~
Main.cpp:20:35: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   20 |     if(a < b) return a = b, true; return false;
      |                                   ^~~~~~
Main.cpp: In function 'int main()':
Main.cpp:132:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  132 |         freopen(filename".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:133:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  133 |         freopen(filename".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 72 ms 15828 KB Output is correct
2 Correct 74 ms 21364 KB Output is correct
3 Correct 71 ms 20164 KB Output is correct
4 Correct 89 ms 23240 KB Output is correct
5 Correct 73 ms 23792 KB Output is correct
6 Correct 65 ms 15816 KB Output is correct
7 Correct 80 ms 16592 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 7004 KB Output is correct
2 Correct 6 ms 7004 KB Output is correct
3 Correct 5 ms 7004 KB Output is correct
4 Correct 6 ms 7260 KB Output is correct
5 Correct 5 ms 7260 KB Output is correct
6 Correct 5 ms 7004 KB Output is correct
7 Correct 4 ms 7004 KB Output is correct
8 Correct 4 ms 6996 KB Output is correct
9 Correct 5 ms 7260 KB Output is correct
10 Correct 4 ms 6920 KB Output is correct
11 Correct 5 ms 7256 KB Output is correct
12 Correct 5 ms 7032 KB Output is correct
13 Correct 5 ms 7004 KB Output is correct
14 Correct 5 ms 7004 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 7004 KB Output is correct
2 Correct 6 ms 7004 KB Output is correct
3 Correct 5 ms 7004 KB Output is correct
4 Correct 6 ms 7260 KB Output is correct
5 Correct 5 ms 7260 KB Output is correct
6 Correct 5 ms 7004 KB Output is correct
7 Correct 4 ms 7004 KB Output is correct
8 Correct 4 ms 6996 KB Output is correct
9 Correct 5 ms 7260 KB Output is correct
10 Correct 4 ms 6920 KB Output is correct
11 Correct 5 ms 7256 KB Output is correct
12 Correct 5 ms 7032 KB Output is correct
13 Correct 5 ms 7004 KB Output is correct
14 Correct 5 ms 7004 KB Output is correct
15 Correct 8 ms 7512 KB Output is correct
16 Correct 8 ms 8024 KB Output is correct
17 Correct 8 ms 7768 KB Output is correct
18 Correct 8 ms 8028 KB Output is correct
19 Correct 9 ms 8028 KB Output is correct
20 Correct 8 ms 7516 KB Output is correct
21 Correct 8 ms 7772 KB Output is correct
22 Correct 8 ms 7516 KB Output is correct
23 Correct 8 ms 7772 KB Output is correct
24 Correct 9 ms 7768 KB Output is correct
25 Correct 9 ms 8028 KB Output is correct
26 Correct 9 ms 8028 KB Output is correct
27 Correct 9 ms 7488 KB Output is correct
28 Correct 8 ms 7772 KB Output is correct

Subtask #4
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 7004 KB Output is correct
2 Correct 6 ms 7004 KB Output is correct
3 Correct 5 ms 7004 KB Output is correct
4 Correct 6 ms 7260 KB Output is correct
5 Correct 5 ms 7260 KB Output is correct
6 Correct 5 ms 7004 KB Output is correct
7 Correct 4 ms 7004 KB Output is correct
8 Correct 4 ms 6996 KB Output is correct
9 Correct 5 ms 7260 KB Output is correct
10 Correct 4 ms 6920 KB Output is correct
11 Correct 5 ms 7256 KB Output is correct
12 Correct 5 ms 7032 KB Output is correct
13 Correct 5 ms 7004 KB Output is correct
14 Correct 5 ms 7004 KB Output is correct
15 Correct 8 ms 7512 KB Output is correct
16 Correct 8 ms 8024 KB Output is correct
17 Correct 8 ms 7768 KB Output is correct
18 Correct 8 ms 8028 KB Output is correct
19 Correct 9 ms 8028 KB Output is correct
20 Correct 8 ms 7516 KB Output is correct
21 Correct 8 ms 7772 KB Output is correct
22 Correct 8 ms 7516 KB Output is correct
23 Correct 8 ms 7772 KB Output is correct
24 Correct 9 ms 7768 KB Output is correct
25 Correct 9 ms 8028 KB Output is correct
26 Correct 9 ms 8028 KB Output is correct
27 Correct 9 ms 7488 KB Output is correct
28 Correct 8 ms 7772 KB Output is correct
29 Correct 54 ms 13012 KB Output is correct
30 Correct 59 ms 17104 KB Output is correct
31 Correct 54 ms 15492 KB Output is correct
32 Correct 57 ms 18388 KB Output is correct
33 Correct 55 ms 17616 KB Output is correct
34 Correct 46 ms 13016 KB Output is correct
35 Correct 52 ms 14036 KB Output is correct
36 Correct 41 ms 12236 KB Output is correct
37 Correct 54 ms 15916 KB Output is correct
38 Correct 51 ms 16172 KB Output is correct
39 Correct 57 ms 17360 KB Output is correct
40 Correct 50 ms 16080 KB Output is correct
41 Correct 42 ms 12236 KB Output is correct
42 Correct 49 ms 14292 KB Output is correct

Subtask #5
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 72 ms 15828 KB Output is correct
2 Correct 74 ms 21364 KB Output is correct
3 Correct 71 ms 20164 KB Output is correct
4 Correct 89 ms 23240 KB Output is correct
5 Correct 73 ms 23792 KB Output is correct
6 Correct 65 ms 15816 KB Output is correct
7 Correct 80 ms 16592 KB Output is correct
8 Correct 5 ms 7004 KB Output is correct
9 Correct 6 ms 7004 KB Output is correct
10 Correct 5 ms 7004 KB Output is correct
11 Correct 6 ms 7260 KB Output is correct
12 Correct 5 ms 7260 KB Output is correct
13 Correct 5 ms 7004 KB Output is correct
14 Correct 4 ms 7004 KB Output is correct
15 Correct 4 ms 6996 KB Output is correct
16 Correct 5 ms 7260 KB Output is correct
17 Correct 4 ms 6920 KB Output is correct
18 Correct 5 ms 7256 KB Output is correct
19 Correct 5 ms 7032 KB Output is correct
20 Correct 5 ms 7004 KB Output is correct
21 Correct 5 ms 7004 KB Output is correct
22 Correct 8 ms 7512 KB Output is correct
23 Correct 8 ms 8024 KB Output is correct
24 Correct 8 ms 7768 KB Output is correct
25 Correct 8 ms 8028 KB Output is correct
26 Correct 9 ms 8028 KB Output is correct
27 Correct 8 ms 7516 KB Output is correct
28 Correct 8 ms 7772 KB Output is correct
29 Correct 8 ms 7516 KB Output is correct
30 Correct 8 ms 7772 KB Output is correct
31 Correct 9 ms 7768 KB Output is correct
32 Correct 9 ms 8028 KB Output is correct
33 Correct 9 ms 8028 KB Output is correct
34 Correct 9 ms 7488 KB Output is correct
35 Correct 8 ms 7772 KB Output is correct
36 Correct 54 ms 13012 KB Output is correct
37 Correct 59 ms 17104 KB Output is correct
38 Correct 54 ms 15492 KB Output is correct
39 Correct 57 ms 18388 KB Output is correct
40 Correct 55 ms 17616 KB Output is correct
41 Correct 46 ms 13016 KB Output is correct
42 Correct 52 ms 14036 KB Output is correct
43 Correct 41 ms 12236 KB Output is correct
44 Correct 54 ms 15916 KB Output is correct
45 Correct 51 ms 16172 KB Output is correct
46 Correct 57 ms 17360 KB Output is correct
47 Correct 50 ms 16080 KB Output is correct
48 Correct 42 ms 12236 KB Output is correct
49 Correct 49 ms 14292 KB Output is correct
50 Correct 78 ms 16840 KB Output is correct
51 Correct 143 ms 32456 KB Output is correct
52 Correct 134 ms 27844 KB Output is correct
53 Correct 148 ms 32448 KB Output is correct
54 Correct 147 ms 38596 KB Output is correct
55 Correct 134 ms 22980 KB Output is correct
56 Correct 142 ms 24772 KB Output is correct
57 Correct 25 ms 10124 KB Output is correct
58 Correct 139 ms 28612 KB Output is correct
59 Correct 130 ms 27848 KB Output is correct
60 Correct 147 ms 37312 KB Output is correct
61 Correct 150 ms 31256 KB Output is correct
62 Correct 25 ms 10196 KB Output is correct
63 Correct 141 ms 24520 KB Output is correct