CSES - Datatähti Open 2021

CSES - Datatähti Open 2021 - Results

Submission details
Task:	Split in Three
Sender:	wlz
Submission time:	2021-01-31 15:49:38 +0200
Language:	C++ (C++17)
Status:	READY
Result:	100

Feedback
group	verdict	score
#1	ACCEPTED	22
#2	ACCEPTED	78

Test results
test	verdict	time	group
#1	ACCEPTED	0.01 s	1, 2	details
#2	ACCEPTED	0.01 s	1, 2	details
#3	ACCEPTED	0.01 s	1, 2	details
#4	ACCEPTED	0.01 s	1, 2	details
#5	ACCEPTED	0.01 s	1, 2	details
#6	ACCEPTED	0.01 s	1, 2	details
#7	ACCEPTED	0.01 s	1, 2	details
#8	ACCEPTED	0.01 s	1, 2	details
#9	ACCEPTED	0.01 s	2	details
#10	ACCEPTED	0.01 s	2	details
#11	ACCEPTED	0.01 s	2	details
#12	ACCEPTED	0.01 s	2	details
#13	ACCEPTED	0.01 s	2	details
#14	ACCEPTED	0.01 s	2	details
#15	ACCEPTED	0.01 s	2	details

Code

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);  
  int n;
  cin >> n;
  if (n % 3 == 0) {
    vector< vector<int> > v = {{1}, {2}, {3}};
    for (int i = 2; 3 * i <= n; i++) {
      v[0].push_back(3 * i);
      v[1].push_back(3 * i - 1);
      v[2].push_back(3 * i - 2);
      int j = 0, k = 0;
      while (v[j][0] != 1) j++;
      while (v[k][0] != 2) k++;
      swap(v[j][0], v[k][0]);
      sort(v.begin(), v.end(), [](const vector<int> &a, const vector<int> &b) {
        return accumulate(a.begin(), a.end(), 0) < accumulate(b.begin(), b.end(), 0);      
      });
    }
    vector<int> ans(n + 1);
    for (int i = 0; i < 3; i++) {
      for (auto& x : v[i]) ans[x] = i + 1;
    }
    for (int i = 1; i <= n; i++) cout << ans[i] << ' ';
    cout << '\n';
  } else if ((n + 1) % 3 == 0 && n > 2) {
    vector< vector<int> > v = {{1, 3}, {5}, {2, 4}};
    for (int i = 6; i <= n; i += 3) {
      v[2].push_back(i);
      v[1].push_back(i + 1);
      v[0].push_back(i + 2);
      int j = 0, k = 0;
      while (v[j][0] != 1) j++;
      while (v[k][0] != 2) k++;
      swap(v[j][0], v[k][0]);
      sort(v.begin(), v.end(), [](const vector<int> &a, const vector<int> &b) {
        return accumulate(a.begin(), a.end(), 0) < accumulate(b.begin(), b.end(), 0);      
      });
    }
    vector<int> ans(n + 1);
    for (int i = 0; i < 3; i++) {
      for (auto& x : v[i]) ans[x] = i + 1;
    }
    for (int i = 1; i <= n; i++) cout << ans[i] << ' ';
    cout << '\n';
  } else {
    cout << "IMPOSSIBLE\n";
  }
  return 0;  
}

Test details

Test 1

Group: 1, 2

Verdict: ACCEPTED

input
`3` view save

correct output
`1 2 3` view save

user output
`1 2 3` view save

Test 2

Group: 1, 2

Verdict: ACCEPTED

input
`4` view save

correct output
`IMPOSSIBLE` view save

user output
`IMPOSSIBLE` view save

Test 3

Group: 1, 2

Verdict: ACCEPTED

input
`5` view save

correct output
`1 3 1 3 2` view save

user output
`1 3 1 3 2` view save

Test 4

Group: 1, 2

Verdict: ACCEPTED

input
`6` view save

correct output
`1 3 2 2 1 3` view save

user output
`1 3 2 2 1 3` view save

Test 5

Group: 1, 2

Verdict: ACCEPTED

input
`7` view save

correct output
`IMPOSSIBLE` view save

user output
`IMPOSSIBLE` view save

Test 6

Group: 1, 2

Verdict: ACCEPTED

input
`8` view save

correct output
`2 3 1 2 3 3 2 1` view save

user output
`1 3 3 1 2 1 2 3` view save

Test 7

Group: 1, 2

Verdict: ACCEPTED

input
`9` view save

correct output
`1 2 3 1 2 3 3 2 1` view save

user output
`1 3 2 2 3 1 1 2 3` view save

Test 8

Group: 1, 2

Verdict: ACCEPTED

input
`10` view save

correct output
`IMPOSSIBLE` view save

user output
`IMPOSSIBLE` view save

Test 9

Group: 2

Verdict: ACCEPTED

input
`42` view save

correct output
`1 3 2 2 1 3 1 2 3 3 2 1 1 2 3 ...` view save

user output
`1 3 2 2 1 3 3 2 1 1 2 3 3 2 1 ...` view save

Test 10

Group: 2

Verdict: ACCEPTED

input
`95` view save

correct output
`1 3 1 3 2 1 2 3 3 2 1 1 2 3 3 ...` view save

user output
`1 3 1 3 2 3 2 1 1 2 3 3 2 1 1 ...` Truncated

Test 11

Group: 2

Verdict: ACCEPTED

input
`96` view save

correct output
`1 3 2 2 1 3 1 2 3 3 2 1 1 2 3 ...` view save

user output
`1 3 2 2 1 3 3 2 1 1 2 3 3 2 1 ...` Truncated

Test 12

Group: 2

Verdict: ACCEPTED

input
`97` view save

correct output
`IMPOSSIBLE` view save

user output
`IMPOSSIBLE` view save

Test 13

Group: 2

Verdict: ACCEPTED

input
`98` view save

correct output
`2 3 1 2 3 3 2 1 1 2 3 3 2 1 1 ...` view save

user output
`1 3 3 1 2 1 2 3 3 2 1 1 2 3 3 ...` Truncated

Test 14

Group: 2

Verdict: ACCEPTED

input
`99` view save

correct output
`1 2 3 1 2 3 3 2 1 1 2 3 3 2 1 ...` view save

user output
`1 3 2 2 3 1 1 2 3 3 2 1 1 2 3 ...` Truncated

Test 15

Group: 2

Verdict: ACCEPTED

input
`100` view save

correct output
`IMPOSSIBLE` view save

user output
`IMPOSSIBLE` view save

Datatähti Open 2021

Split in Three

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

Tasks

Submissions (wlz)