CSES - Datatähti Open 2021

CSES - Datatähti Open 2021 - Results

Submission details
Task:	Split in Three
Sender:	Ausca
Submission time:	2021-01-29 22:18:08 +0200
Language:	C++ (C++17)
Status:	READY
Result:	22

Feedback
group	verdict	score
#1	ACCEPTED	22
#2	WRONG ANSWER	0

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	WRONG ANSWER	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>
#define FR(i, N) for (int i = 0; i < int(N); i++)
#define all(x) begin(x), end(x)

using namespace std;

using ll = long long;

int main() {
	cin.tie(0);
	cin.sync_with_stdio(0);
	int N;
	cin >> N;
	int ans[N+1];
	if (N%3 == 0) {
        int still = N/3;
        int u = 1;
        int v = N;
        while (still > 2) {
            still -= 2;
            ans[u++] = 1;
            ans[u++] = 2;
            ans[u++] = 3;
            ans[v--] = 1;
            ans[v--] = 2;
            ans[v--] = 3;
        }
        if (still == 1) {
            ans[u++] = 1;
            ans[u++] = 2;
            ans[u++] = 3;
        }
        else {
            ans[u++] = 2;
            ans[u++] = 1;
            ans[u++] = 3;
            ans[v--] = 2;
            ans[v--] = 3;
            ans[v--] = 1;
        }
	}
	else if (N%3 == 1) {
        cout << "IMPOSSIBLE" << '\n';
        return 0;
	}
	else {
        if (N%6 == 5) {
            int still = N/3;
            int u = 1;
            int v = N;
            while (still > 1) {
                still -= 2;
                ans[u++] = 1;
                ans[u++] = 2;
                ans[u++] = 1;
                ans[v--] = 1;
                ans[v--] = 2;
                ans[v--] = 3;
            }
            ans[u++] = 1;
            ans[u++] = 3;
            ans[u++] = 1;
            ans[u++] = 3;
            ans[u++] = 2;
        }
        else {
            ans[N] = 3;
            ans[N-1] = 2;
            ans[N-2] = 1;
            ans[N-3] = 1;
            int u = 1;
            int v = N-4;
            for (int i = 0; i < N/6-1; i++) {
                ans[u++] = 1;
                ans[v--] = 1;
            }
            for (int i = 0; i < N/6; i++) {
                ans[u++] = 2;
                ans[v--] = 2;
            }
            for (int i = 0; i < N/6; i++) {
                ans[u++] = 3;
                ans[v--] = 3;
            }
        }
	}
	for (int i = 1; i <= N; i++) {
        cout << ans[i] << '\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
`2 1 3 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
`2 3 3 2 1 ...` 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 2 3 1 2 ...` 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 2 3 1 2 ...` view save

Test 10

Group: 2

Verdict: WRONG ANSWER

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 2 1 1 2 ...` 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 2 3 1 2 ...` 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 1 1 1 1 ...` 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 2 3 1 2 ...` 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 (Ausca)