CSES - Aalto Competitive Programming 2024 - wk10 - Homework

CSES - Aalto Competitive Programming 2024 - wk10 - Homework - Results

Submission details
Task:	Line Intersections
Sender:	hungdojan
Submission time:	2024-11-11 02:21:31 +0200
Language:	C++ (C++17)
Status:	READY
Result:	WRONG ANSWER

Test results
test	verdict	time
#1	ACCEPTED	0.00 s	details
#2	ACCEPTED	0.00 s	details
#3	ACCEPTED	0.00 s	details
#4	ACCEPTED	0.00 s	details
#5	ACCEPTED	0.00 s	details
#6	WRONG ANSWER	0.00 s	details
#7	ACCEPTED	0.00 s	details
#8	WRONG ANSWER	0.00 s	details
#9	ACCEPTED	0.00 s	details
#10	WRONG ANSWER	0.00 s	details
#11	WRONG ANSWER	0.00 s	details
#12	WRONG ANSWER	0.00 s	details
#13	WRONG ANSWER	0.00 s	details
#14	ACCEPTED	0.00 s	details
#15	WRONG ANSWER	0.00 s	details
#16	WRONG ANSWER	0.00 s	details
#17	WRONG ANSWER	0.00 s	details
#18	WRONG ANSWER	0.01 s	details
#19	WRONG ANSWER	0.00 s	details
#20	WRONG ANSWER	0.00 s	details
#21	WRONG ANSWER	0.00 s	details
#22	WRONG ANSWER	0.00 s	details
#23	WRONG ANSWER	0.00 s	details
#24	WRONG ANSWER	0.00 s	details
#25	WRONG ANSWER	0.00 s	details
#26	WRONG ANSWER	0.00 s	details
#27	WRONG ANSWER	0.00 s	details
#28	WRONG ANSWER	0.00 s	details
#29	WRONG ANSWER	0.00 s	details
#30	WRONG ANSWER	0.00 s	details
#31	WRONG ANSWER	0.00 s	details
#32	WRONG ANSWER	0.00 s	details
#33	WRONG ANSWER	0.00 s	details
#34	WRONG ANSWER	0.00 s	details
#35	WRONG ANSWER	0.00 s	details
#36	WRONG ANSWER	0.00 s	details
#37	WRONG ANSWER	0.04 s	details
#38	WRONG ANSWER	0.04 s	details
#39	WRONG ANSWER	0.04 s	details
#40	WRONG ANSWER	0.04 s	details

Code

#include <bits/stdc++.h>
using namespace std;

#define I_2D(row, col, width) ((row) * (width) + (col))
#define PRINT_ARR(arr, n)                                                      \
  do {                                                                         \
    for (int i = 0; i < n; i++) {                                              \
      cout << arr[i] << " ";                                                   \
    }                                                                          \
    cout << "\n";                                                              \
  } while (0)
#define PRINT_VEC_ARR(v, n)                                                    \
  do {                                                                         \
    for (int i = 0; i < n; i++) {                                              \
      cout << i << ": ";                                                       \
      for (auto item : v[i]) {                                                 \
        cout << item << " ";                                                   \
      }                                                                        \
      cout << endl;                                                            \
    }                                                                          \
  } while (0)
#define endl '\n';

typedef long long ll;
typedef complex<ll> pp;
typedef pair<pair<ll, ll>, ll> tr;

enum events_t {
  VERTICAL = 0,
  HORIZONTAL_START = 1,
  HORIZONTAL_END = 2,
};

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

  vector<vector<ll>> lines(n, vector<ll>(4));

  for (int i = 0; i < n; i++) {
    cin >> lines[i][0] >> lines[i][1] >> lines[i][2] >> lines[i][3];
  }

  // calculate
  vector<vector<ll>> events;

  ll tmp;
  for (auto line : lines) {
    ll x1 = line[0], y1 = line[1], x2 = line[2], y2 = line[3];
    if (x1 == x2) {
      // vertical
      if (y1 > y2) {
        tmp = y1;
        y1 = y2;
        y2 = tmp;
      }
      events.push_back({x1, VERTICAL, y1, y2});
    } else {
      // horizontal
      if (x1 > x2) {
        tmp = x1;
        x1 = x2;
        x2 = tmp;
      }
      events.push_back({x1, HORIZONTAL_START, y1});
      events.push_back({x2, HORIZONTAL_END, y1});
    }
  }

  sort(events.begin(), events.end());

  ll intersections = 0;
  set <ll> ys;
  for (auto e : events) {
    if (e[1] == VERTICAL) {
      // TODO:
      auto l = ys.lower_bound(e[2]);
      auto u = ys.upper_bound(e[3]);
      intersections += distance(l, u);
    } else if (e[1] == HORIZONTAL_START) {
      ys.insert(e[2]);
    } else {
      ys.erase(e[2]);
    }
  }
  cout << intersections << endl;

  return 0;
}

Test details

Test 1

Verdict: ACCEPTED

input
`1 1 1 -1 1` view save

correct output
`0` view save

user output
`0` view save

Test 2

Verdict: ACCEPTED

input
`1 -1 1 1 1` view save

correct output
`0` view save

user output
`0` view save

Test 3

Verdict: ACCEPTED

input
`2 2 1 -2 1 -1 2 -2 2` view save

correct output
`0` view save

user output
`0` view save

Test 4

Verdict: ACCEPTED

input
`2 -2 2 2 2 -1 0 -2 0` view save

correct output
`0` view save

user output
`0` view save

Test 5

Verdict: ACCEPTED

input
`3 3 2 -3 2 -1 3 -2 3 -3 -1 -2 -1` view save

correct output
`0` view save

user output
`0` view save

Test 6

Verdict: WRONG ANSWER

input
`3 -3 3 2 3 -1 0 -3 0 -1 2 -1 -1` view save

correct output
`2` view save

user output
`1` view save

Test 7

Verdict: ACCEPTED

input
`4 4 2 -4 2 -2 4 -3 4 -4 -1 -3 -1 -1 0 3 0` view save

correct output
`0` view save

user output
`0` view save

Test 8

Verdict: WRONG ANSWER

input
`4 -4 3 3 3 -1 4 4 4 -4 1 -1 1 -1 0 -1 -2` view save

correct output
`3` view save

user output
`0` view save

Test 9

Verdict: ACCEPTED

input
`5 5 2 -5 2 -2 5 -4 5 -4 -1 -3 -1 -2 0 4 0 ...` view save

correct output
`0` view save

user output
`0` view save

Test 10

Verdict: WRONG ANSWER

input
`5 -5 4 4 4 -1 5 5 5 -5 1 -1 1 -2 0 -2 -2 ...` view save

correct output
`6` view save

user output
`1` view save

Test 11

Verdict: WRONG ANSWER

input
`5 5 -2 5 -3 -5 -5 -5 -1 5 1 -4 1 1 -1 1 0 ...` view save

correct output
`6` view save

user output
`0` view save

Test 12

Verdict: WRONG ANSWER

input
`6 6 3 -6 3 -3 6 -5 6 -5 -1 -4 -1 -2 2 -1 2 ...` view save

correct output
`5` view save

user output
`2` view save

Test 13

Verdict: WRONG ANSWER

input
`6 -6 5 4 5 -2 6 0 6 1 -1 3 -1 0 0 -3 0 ...` view save

correct output
`8` view save

user output
`1` view save

Test 14

Verdict: ACCEPTED

input
`7 7 3 6 3 -6 -3 7 -3 -4 -6 -2 -6 -2 -2 3 -2 ...` view save

correct output
`0` view save

user output
`0` view save

Test 15

Verdict: WRONG ANSWER

input
`7 -7 6 5 6 -2 7 0 7 2 -2 4 -2 0 0 -3 0 ...` view save

correct output
`10` view save

user output
`1` view save

Test 16

Verdict: WRONG ANSWER

input
`10 10 5 9 5 -8 -4 10 -4 -6 -9 -2 -9 -2 -3 4 -3 ...` view save

correct output
`9` view save

user output
`0` view save

Test 17

Verdict: WRONG ANSWER

input
`10 -7 -10 9 -10 9 -1 9 0 -4 -4 -7 -4 4 3 -8 3 ...` view save

correct output
`24` view save

user output
`2` view save

Test 18

Verdict: WRONG ANSWER

input
`10 -9 4 -9 7 -8 0 1 0 -1 8 -1 -10 -10 -6 -5 -6 ...` view save

correct output
`24` view save

user output
`4` view save

Test 19

Verdict: WRONG ANSWER

input
`10 8 1 8 -7 7 5 7 2 2 -6 2 -8 -6 -10 -6 4 ...` view save

correct output
`24` view save

user output
`2` view save

Test 20

Verdict: WRONG ANSWER

input
`10 -9 8 7 8 -3 9 10 9 -9 2 -2 2 -3 0 -3 -4 ...` view save

correct output
`24` view save

user output
`3` view save

Test 21

Verdict: WRONG ANSWER

input
`10 9 -4 9 -6 -9 -10 -9 -3 10 2 -8 2 2 -2 2 1 ...` view save

correct output
`21` view save

user output
`4` view save

Test 22

Verdict: WRONG ANSWER

input
`10 -6 6 -4 6 10 5 -1 5 -4 1 -4 -5 -9 -9 -9 -2 ...` view save

correct output
`24` view save

user output
`6` view save

Test 23

Verdict: WRONG ANSWER

input
`50 50 22 44 22 -38 -20 50 -20 -27 -41 -10 -41 -11 -16 17 -16 ...` view save

correct output
`576` view save

user output
`38` view save

Test 24

Verdict: WRONG ANSWER

input
`50 -32 -48 44 -48 45 -7 45 -2 -18 -17 -35 -17 20 12 -38 12 ...` view save

correct output
`621` view save

user output
`47` view save

Test 25

Verdict: WRONG ANSWER

input
`50 -43 21 -43 34 -38 1 7 1 -6 40 -6 -49 -46 -30 -25 -30 ...` view save

correct output
`616` view save

user output
`86` view save

Test 26

Verdict: WRONG ANSWER

input
`50 40 5 40 -33 36 22 36 11 10 -29 10 -36 -28 -50 -28 20 ...` view save

correct output
`624` view save

user output
`76` view save

Test 27

Verdict: WRONG ANSWER

input
`50 -45 37 33 37 -14 42 48 42 -41 11 -10 11 -15 2 -15 -1 ...` view save

correct output
`576` view save

user output
`62` view save

Test 28

Verdict: WRONG ANSWER

input
`100 100 44 87 44 -75 -40 100 -40 -53 -82 -21 -82 -23 -31 34 -31 ...` view save

correct output
`2464` view save

user output
`335` view save

Test 29

Verdict: WRONG ANSWER

input
`100 -63 -95 87 -95 90 -13 90 -3 -36 -34 -69 -34 40 24 -76 24 ...` view save

correct output
`2475` view save

user output
`272` view save

Test 30

Verdict: WRONG ANSWER

input
`100 -86 42 -86 68 -76 2 14 2 -13 80 -13 -97 -92 -59 -51 -59 ...` view save

correct output
`2500` view save

user output
`249` view save

Test 31

Verdict: WRONG ANSWER

input
`100 81 9 81 -66 71 43 71 22 20 -57 20 -72 -55 -99 -55 40 ...` view save

correct output
`2464` view save

user output
`274` view save

Test 32

Verdict: WRONG ANSWER

input
`100 -89 75 67 75 -27 84 96 84 -82 22 -21 22 -29 4 -29 -3 ...` view save

correct output
`2491` view save

user output
`254` view save

Test 33

Verdict: WRONG ANSWER

input
`200 199 88 173 88 -149 -79 200 -79 -106 -163 -41 -163 -45 -62 68 -62 ...` view save

correct output
`9984` view save

user output
`1159` view save

Test 34

Verdict: WRONG ANSWER

input
`200 -126 -190 173 -190 180 -26 180 -6 -72 -68 -139 -68 80 48 -152 48 ...` view save

correct output
`9919` view save

user output
`939` view save

Test 35

Verdict: WRONG ANSWER

input
`200 -172 83 -172 136 -152 4 28 4 -25 159 -25 -193 -184 -117 -101 -117 ...` view save

correct output
`9991` view save

user output
`1089` view save

Test 36

Verdict: WRONG ANSWER

input
`200 161 19 161 -131 143 86 143 44 39 -114 39 -144 -110 -198 -110 80 ...` view save

correct output
`9999` view save

user output
`1019` view save

Test 37

Verdict: WRONG ANSWER

input
`10000 9944 4407 8652 4407 -7438 -3954 9981 -3954 -5278 -8154 -2068 -8154 -2242 -3089 3395 -3089 ...` view save

correct output
`24992431` view save

user output
`2764910` view save

Test 38

Verdict: WRONG ANSWER

input
`10000 -6299 -9482 8631 -9482 8955 -1294 8955 -305 -3589 -3393 -6912 -3393 3977 2386 -7601 2386 ...` view save

correct output
`24999775` view save

user output
`2769390` view save

Test 39

Verdict: WRONG ANSWER

input
`10000 -8586 4163 -8586 6799 -7574 217 1386 217 -1259 7926 -1259 -9626 -9188 -5855 -5042 -5855 ...` view save

correct output
`24999856` view save

user output
`2802373` view save

Test 40

Verdict: WRONG ANSWER

input
`10000 8013 945 8013 -6546 7113 4297 7113 2181 1951 -5678 1951 -7171 -5510 -9876 -5510 3969 ...` view save

correct output
`24999996` view save

user output
`2748110` view save

Aalto Competitive Programming 2024 - wk10 - Homework

Line Intersections

Code

Test details

Test 1

Test 2

Test 3

Test 4

Test 5

Test 6

Test 7

Test 8

Test 9

Test 10

Test 11

Test 12

Test 13

Test 14

Test 15

Test 16

Test 17

Test 18

Test 19

Test 20

Test 21

Test 22

Test 23

Test 24

Test 25

Test 26

Test 27

Test 28

Test 29

Test 30

Test 31

Test 32

Test 33

Test 34

Test 35

Test 36

Test 37

Test 38

Test 39

Test 40

Tasks

Submissions (hungdojan)