oj.uz

Submission #617823

# Submission time Handle Problem Language Result Execution time Memory
617823 2022-08-01T14:56:14 Z happypotato Fountain Parks (IOI21_parks) C++17
30 / 100
 696 ms 49200 KB 
#include "parks.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define pii pair<int, int>
#define ff first
#define ss second
const int mxN = 2e5 + 1;
const int dx[mxN] = {0, 1, 0, -1}, dy[mxN] = {1, 0, -1, 0};
bool vis[mxN];
pair<pii, int> pts[mxN];
pii opts[mxN];
map<pii, int> allpts;
int n;
vector<pii> edges;
vector<pii> imp;
bool CheckConnected() {
    queue<pii> q;
    set<pii> track;
    q.push(pts[0].ff);
    track.insert(pts[0].ff);
    while (!q.empty()) {
        pii cur = q.front();
        q.pop();
        for (int k = 0; k < 4; k++) {
            int nx = cur.ff + dx[k] * 2;
            int ny = cur.ss + dy[k] * 2;
            if (allpts.find({nx, ny}) != allpts.end() && track.find({nx, ny}) == track.end()) {
                q.push({nx, ny});
                track.insert({nx, ny});
                edges.pb({allpts[cur], allpts[{nx, ny}]});
            }
        }
    }
    return (int(track.size()) == n);
}
void st123() {
    int arr[3][mxN + 10];
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < mxN + 10; j++) {
            arr[i][j] = -1;
        }
    }
    for (int i = 0; i < n; i++) {
        arr[(pts[i].ff.ff >> 1) - 1][pts[i].ff.ss] = pts[i].ss;
    }
    bool con01 = false, con12 = false;
    bool notfix = false;
    vector<int> u, v, a, b;
    for (int i = 0; i < mxN + 6; i += 2) {
        // if (i <= 10) cout << arr[0][i] << ' ' << arr[1][i] << ' ' << arr[2][i] << endl;
        if (arr[0][i] >= 0 && arr[0][i + 2] >= 0) {
            u.pb(arr[0][i]); v.pb(arr[0][i + 2]);
            a.pb(1); b.pb(i + 1);
        }
        if (arr[2][i] >= 0 && arr[2][i + 2] >= 0) {
            u.pb(arr[2][i]); v.pb(arr[2][i + 2]);
            a.pb(7); b.pb(i + 1);
        }
        bool special = false;
        if (notfix) {
            u.pb(arr[0][i]); v.pb(arr[1][i]);
            a.pb(3); b.pb(i + 1);
            special = true;
            notfix = false;
        }
        bool usemid = false;
        if (!(arr[1][i + 2] >= 0 && arr[2][i + 2] >= 0 && !con12)) special = true;
        if (arr[1][i] >= 0 && arr[1][i + 2] >= 0) {
            u.pb(arr[1][i]); v.pb(arr[1][i + 2]);
            a.pb((special ? 5 : 3)); b.pb(i + 1);
            usemid = !special;
        }
        if (arr[0][i + 2] >= 0 && arr[1][i + 2] >= 0 && !con01) {
            if (!usemid) {
                u.pb(arr[0][i + 2]); v.pb(arr[1][i + 2]);
                a.pb(3); b.pb(i + 1);
            } else notfix = true;
            con01 = true;
        } else con01 = false;
        if (arr[1][i + 2] >= 0 && arr[2][i + 2] >= 0 && !con12) {
            u.pb(arr[1][i + 2]); v.pb(arr[2][i + 2]);
            a.pb(5); b.pb(i + 1);
            con12 = true;
        } else con12 = false;
    }
    build(u, v, a, b);
    return;
}
void st45() {
    set<pair<pii, pii> > edgeset;
    for (pii &cur : edges) {
        pair<pii, pii> edge = {opts[cur.ff], opts[cur.ss]};
        if (edge.ff.ff > edge.ss.ff) swap(edge.ff, edge.ss);
        else if (edge.ff.ff == edge.ss.ff && edge.ff.ss > edge.ss.ss) swap(edge.ff, edge.ss);
        edgeset.insert(edge);
    }
    vector<int> ordering[4];
    for (int i = 0; i < edges.size(); i++) {
        pii fir = opts[edges[i].ff], sec = opts[edges[i].ss];
        pii important;
        bool left, right, middle;
        if (fir.ff == sec.ff) {
            // -2
            left = (edgeset.find({{fir.ff - 2, fir.ss}, fir}) != edgeset.end());
            right = (edgeset.find({{sec.ff - 2, sec.ss}, sec}) != edgeset.end());
            middle = (edgeset.find({{fir.ff - 2, fir.ss}, {sec.ff - 2, sec.ss}}) != edgeset.end());
            if (left && right) important.ff = 3;
            else if (middle) important.ff = 2;
            else if (left || right) important.ff = 1;
            else important.ff = 0;
            // +2
            left = (edgeset.find({fir, {fir.ff + 2, fir.ss}}) != edgeset.end());
            right = (edgeset.find({sec, {sec.ff + 2, sec.ss}}) != edgeset.end());
            middle = (edgeset.find({{fir.ff + 2, fir.ss}, {sec.ff + 2, sec.ss}}) != edgeset.end());
            if (left && right) important.ss = 3;
            else if (middle) important.ss = 2;
            else if (left || right) important.ss = 1;
            else important.ss = 0;
        } else if (fir.ss == sec.ss) {
            // -2
            left = (edgeset.find({{fir.ff, fir.ss - 2}, fir}) != edgeset.end());
            right = (edgeset.find({{sec.ff, sec.ss - 2}, sec}) != edgeset.end());
            left = (edgeset.find({{fir.ff, fir.ss - 2}, {sec.ff, sec.ss - 2}}) != edgeset.end());
            if (left && right) important.ff = 3;
            else if (middle) important.ff = 2;
            else if (left || right) important.ff = 1;
            else important.ff = 0;
            // +2
            left = (edgeset.find({fir, {fir.ff, fir.ss + 2}}) != edgeset.end());
            right = (edgeset.find({sec, {sec.ff, sec.ss + 2}}) != edgeset.end());
            left = (edgeset.find({{fir.ff, fir.ss + 2}, {sec.ff, sec.ss + 2}}) != edgeset.end());
            if (left && right) important.ss = 3;
            else if (middle) important.ss = 2;
            else if (left || right) important.ss = 1;
            else important.ss = 0;
        }
        imp.pb(important);
        ordering[max(important.ff, important.ss)].pb(i);
    }
    int m = edges.size();
    vector<pii> coor(m);
    for (int urgency = 3; urgency >= 0; urgency--) {
        for (int &cur : ordering[urgency]) {
            pii fir = opts[edges[cur].ff], sec = opts[edges[cur].ss];
            if (imp[cur].ff >= imp[cur].ss) {
                // add
                coor[cur] = {fir.ff + 1, fir.ss + 1};
            } else {
                // minus
                coor[cur] = {sec.ff - 1, sec.ss - 1};
            }
        }
    }
    vector<int> u(m), v(m), a(m), b(m);
    for (int i = 0; i < m; i++) {
        u[i] = edges[i].ff;
        v[i] = edges[i].ss;
        a[i] = coor[i].ff;
        b[i] = coor[i].ss;
    }
    build(u, v, a, b);
    return;
}
int construct_roads(vector<int> ox, vector<int> oy) {
    n = ox.size();
    int maxx = 0;
    for (int i = 0; i < n; i++) {
        pts[i] = {{ox[i], oy[i]}, i};
        opts[i] = pts[i].ff;
        allpts[pts[i].ff] = i;
        maxx = max(maxx, pts[i].ff.ff);
    }
    // for (int i = 0; i < n; i++) {
    //     cout << pts[i].ff.ff << ' ' << pts[i].ff.ss << ' ' << pts[i].ss << endl;
    // }
    if (!CheckConnected()) return 0;
    if (maxx <= 6) st123();
    else st45();
    return 1;
}

Compilation message

parks.cpp: In function 'void st45()':
parks.cpp:100:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  100 |     for (int i = 0; i < edges.size(); i++) {
      |                     ~~^~~~~~~~~~~~~~
parks.cpp:135:18: warning: 'middle' may be used uninitialized in this function [-Wmaybe-uninitialized]
  135 |             else if (middle) important.ss = 2;
      |                  ^~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2644 KB Output is correct
2 Correct 3 ms 2644 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 208 ms 20244 KB Output is correct
10 Correct 17 ms 4564 KB Output is correct
11 Correct 95 ms 11880 KB Output is correct
12 Correct 26 ms 5296 KB Output is correct
13 Correct 45 ms 6224 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 227 ms 20716 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2644 KB Output is correct
2 Correct 3 ms 2644 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 208 ms 20244 KB Output is correct
10 Correct 17 ms 4564 KB Output is correct
11 Correct 95 ms 11880 KB Output is correct
12 Correct 26 ms 5296 KB Output is correct
13 Correct 45 ms 6224 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 227 ms 20716 KB Output is correct
17 Correct 3 ms 2644 KB Output is correct
18 Correct 3 ms 2644 KB Output is correct
19 Correct 2 ms 2644 KB Output is correct
20 Correct 2 ms 2644 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 2 ms 2644 KB Output is correct
23 Correct 509 ms 40800 KB Output is correct
24 Correct 2 ms 2644 KB Output is correct
25 Correct 3 ms 2900 KB Output is correct
26 Correct 2 ms 596 KB Output is correct
27 Correct 3 ms 724 KB Output is correct
28 Correct 176 ms 18176 KB Output is correct
29 Correct 273 ms 25504 KB Output is correct
30 Correct 375 ms 34732 KB Output is correct
31 Correct 535 ms 41780 KB Output is correct
32 Correct 2 ms 2644 KB Output is correct
33 Correct 3 ms 2644 KB Output is correct
34 Correct 3 ms 2644 KB Output is correct
35 Correct 3 ms 212 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 3 ms 2644 KB Output is correct
38 Correct 2 ms 2644 KB Output is correct
39 Correct 2 ms 2644 KB Output is correct
40 Correct 2 ms 2644 KB Output is correct
41 Correct 1 ms 212 KB Output is correct
42 Correct 2 ms 2644 KB Output is correct
43 Correct 2 ms 468 KB Output is correct
44 Correct 2 ms 596 KB Output is correct
45 Correct 187 ms 20724 KB Output is correct
46 Correct 285 ms 30036 KB Output is correct
47 Correct 339 ms 30120 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2644 KB Output is correct
2 Correct 3 ms 2644 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 208 ms 20244 KB Output is correct
10 Correct 17 ms 4564 KB Output is correct
11 Correct 95 ms 11880 KB Output is correct
12 Correct 26 ms 5296 KB Output is correct
13 Correct 45 ms 6224 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 227 ms 20716 KB Output is correct
17 Correct 3 ms 2644 KB Output is correct
18 Correct 3 ms 2644 KB Output is correct
19 Correct 2 ms 2644 KB Output is correct
20 Correct 2 ms 2644 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 2 ms 2644 KB Output is correct
23 Correct 509 ms 40800 KB Output is correct
24 Correct 2 ms 2644 KB Output is correct
25 Correct 3 ms 2900 KB Output is correct
26 Correct 2 ms 596 KB Output is correct
27 Correct 3 ms 724 KB Output is correct
28 Correct 176 ms 18176 KB Output is correct
29 Correct 273 ms 25504 KB Output is correct
30 Correct 375 ms 34732 KB Output is correct
31 Correct 535 ms 41780 KB Output is correct
32 Correct 2 ms 2644 KB Output is correct
33 Correct 3 ms 2644 KB Output is correct
34 Correct 3 ms 2644 KB Output is correct
35 Correct 3 ms 212 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 3 ms 2644 KB Output is correct
38 Correct 2 ms 2644 KB Output is correct
39 Correct 2 ms 2644 KB Output is correct
40 Correct 2 ms 2644 KB Output is correct
41 Correct 1 ms 212 KB Output is correct
42 Correct 2 ms 2644 KB Output is correct
43 Correct 2 ms 468 KB Output is correct
44 Correct 2 ms 596 KB Output is correct
45 Correct 187 ms 20724 KB Output is correct
46 Correct 285 ms 30036 KB Output is correct
47 Correct 339 ms 30120 KB Output is correct
48 Correct 2 ms 2644 KB Output is correct
49 Correct 2 ms 2644 KB Output is correct
50 Correct 2 ms 2644 KB Output is correct
51 Correct 2 ms 2644 KB Output is correct
52 Correct 3 ms 2644 KB Output is correct
53 Correct 3 ms 2644 KB Output is correct
54 Correct 4 ms 2644 KB Output is correct
55 Correct 544 ms 41516 KB Output is correct
56 Correct 2 ms 2644 KB Output is correct
57 Correct 7 ms 3028 KB Output is correct
58 Correct 16 ms 3796 KB Output is correct
59 Correct 9 ms 1364 KB Output is correct
60 Correct 230 ms 21844 KB Output is correct
61 Correct 399 ms 29976 KB Output is correct
62 Correct 444 ms 36400 KB Output is correct
63 Correct 626 ms 41544 KB Output is correct
64 Correct 1 ms 212 KB Output is correct
65 Correct 2 ms 2644 KB Output is correct
66 Correct 1 ms 212 KB Output is correct
67 Correct 404 ms 38236 KB Output is correct
68 Correct 404 ms 38144 KB Output is correct
69 Correct 456 ms 38768 KB Output is correct
70 Correct 5 ms 724 KB Output is correct
71 Correct 7 ms 1108 KB Output is correct
72 Correct 212 ms 20264 KB Output is correct
73 Correct 293 ms 30508 KB Output is correct
74 Correct 485 ms 38232 KB Output is correct
75 Correct 503 ms 40392 KB Output is correct
76 Correct 425 ms 39116 KB Output is correct
77 Correct 5 ms 852 KB Output is correct
78 Correct 6 ms 1364 KB Output is correct
79 Correct 199 ms 21512 KB Output is correct
80 Correct 388 ms 31852 KB Output is correct
81 Correct 508 ms 39832 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2644 KB Output is correct
2 Correct 3 ms 2644 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 208 ms 20244 KB Output is correct
10 Correct 17 ms 4564 KB Output is correct
11 Correct 95 ms 11880 KB Output is correct
12 Correct 26 ms 5296 KB Output is correct
13 Correct 45 ms 6224 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 227 ms 20716 KB Output is correct
17 Incorrect 1 ms 260 KB Tree (a[1], b[1]) = (200001, 3) is not adjacent to edge between u[1]=0 @(200000, 2) and v[1]=2 @(199998, 2)
18 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2644 KB Output is correct
2 Correct 3 ms 2644 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 208 ms 20244 KB Output is correct
10 Correct 17 ms 4564 KB Output is correct
11 Correct 95 ms 11880 KB Output is correct
12 Correct 26 ms 5296 KB Output is correct
13 Correct 45 ms 6224 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 227 ms 20716 KB Output is correct
17 Incorrect 696 ms 49200 KB Tree (a[1], b[1]) = (82423, 100003) is not adjacent to edge between u[1]=0 @(82422, 100002) and v[1]=148989 @(82420, 100002)
18 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2644 KB Output is correct
2 Correct 3 ms 2644 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 208 ms 20244 KB Output is correct
10 Correct 17 ms 4564 KB Output is correct
11 Correct 95 ms 11880 KB Output is correct
12 Correct 26 ms 5296 KB Output is correct
13 Correct 45 ms 6224 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 227 ms 20716 KB Output is correct
17 Correct 3 ms 2644 KB Output is correct
18 Correct 3 ms 2644 KB Output is correct
19 Correct 2 ms 2644 KB Output is correct
20 Correct 2 ms 2644 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 2 ms 2644 KB Output is correct
23 Correct 509 ms 40800 KB Output is correct
24 Correct 2 ms 2644 KB Output is correct
25 Correct 3 ms 2900 KB Output is correct
26 Correct 2 ms 596 KB Output is correct
27 Correct 3 ms 724 KB Output is correct
28 Correct 176 ms 18176 KB Output is correct
29 Correct 273 ms 25504 KB Output is correct
30 Correct 375 ms 34732 KB Output is correct
31 Correct 535 ms 41780 KB Output is correct
32 Correct 2 ms 2644 KB Output is correct
33 Correct 3 ms 2644 KB Output is correct
34 Correct 3 ms 2644 KB Output is correct
35 Correct 3 ms 212 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 3 ms 2644 KB Output is correct
38 Correct 2 ms 2644 KB Output is correct
39 Correct 2 ms 2644 KB Output is correct
40 Correct 2 ms 2644 KB Output is correct
41 Correct 1 ms 212 KB Output is correct
42 Correct 2 ms 2644 KB Output is correct
43 Correct 2 ms 468 KB Output is correct
44 Correct 2 ms 596 KB Output is correct
45 Correct 187 ms 20724 KB Output is correct
46 Correct 285 ms 30036 KB Output is correct
47 Correct 339 ms 30120 KB Output is correct
48 Correct 2 ms 2644 KB Output is correct
49 Correct 2 ms 2644 KB Output is correct
50 Correct 2 ms 2644 KB Output is correct
51 Correct 2 ms 2644 KB Output is correct
52 Correct 3 ms 2644 KB Output is correct
53 Correct 3 ms 2644 KB Output is correct
54 Correct 4 ms 2644 KB Output is correct
55 Correct 544 ms 41516 KB Output is correct
56 Correct 2 ms 2644 KB Output is correct
57 Correct 7 ms 3028 KB Output is correct
58 Correct 16 ms 3796 KB Output is correct
59 Correct 9 ms 1364 KB Output is correct
60 Correct 230 ms 21844 KB Output is correct
61 Correct 399 ms 29976 KB Output is correct
62 Correct 444 ms 36400 KB Output is correct
63 Correct 626 ms 41544 KB Output is correct
64 Correct 1 ms 212 KB Output is correct
65 Correct 2 ms 2644 KB Output is correct
66 Correct 1 ms 212 KB Output is correct
67 Correct 404 ms 38236 KB Output is correct
68 Correct 404 ms 38144 KB Output is correct
69 Correct 456 ms 38768 KB Output is correct
70 Correct 5 ms 724 KB Output is correct
71 Correct 7 ms 1108 KB Output is correct
72 Correct 212 ms 20264 KB Output is correct
73 Correct 293 ms 30508 KB Output is correct
74 Correct 485 ms 38232 KB Output is correct
75 Correct 503 ms 40392 KB Output is correct
76 Correct 425 ms 39116 KB Output is correct
77 Correct 5 ms 852 KB Output is correct
78 Correct 6 ms 1364 KB Output is correct
79 Correct 199 ms 21512 KB Output is correct
80 Correct 388 ms 31852 KB Output is correct
81 Correct 508 ms 39832 KB Output is correct
82 Incorrect 1 ms 260 KB Tree (a[1], b[1]) = (200001, 3) is not adjacent to edge between u[1]=0 @(200000, 2) and v[1]=2 @(199998, 2)
83 Halted 0 ms 0 KB -