CSES - Datatähti Open 2021

CSES - Datatähti Open 2021 - Results

Submission details
Task:	Split in Three
Sender:	fishy15
Submission time:	2021-01-31 00:53:23 +0200
Language:	C++ (C++17)
Status:	READY
Result:	0

Feedback
group	verdict	score
#1	WRONG ANSWER	0
#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	WRONG ANSWER	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	WRONG ANSWER	0.01 s	2	details
#15	ACCEPTED	0.01 s	2	details

Code

#include <iostream>
#include <iomanip>
#include <fstream>
#include <vector>
#include <array>
#include <algorithm>
#include <utility>
#include <map>
#include <queue>
#include <set>
#include <cmath>
#include <cstdio>
#include <cstring>
 
#define ll long long
#define ld long double
#define eps 1e-8
#define MOD 1000000007
 
#define INF 0x3f3f3f3f
#define INFLL 0x3f3f3f3f3f3f3f3f
 
// change if necessary
#define MAXN 1000000
 
using namespace std;
 
int n;
 
int sum(const vector<int> &v) {
    int s = 0;
    for (int x : v) s += x;
    return s;
}
 
int main() {
    cin.tie(0)->sync_with_stdio(0);
 
    cin >> n;
 
    if (n % 3 == 0) {
        vector<vector<int>> v(3);
        int cur = 1;
        for (int i = 0; i < n; i++) {
            if (i % 3 == 0) cur--;
            v[cur % 3].push_back(i + 1); 
            cur++;
        }
        if (sum(v[0]) > sum(v[1])) swap(v[0], v[1]);
        if (sum(v[1]) > sum(v[2])) swap(v[1], v[2]);
        if (sum(v[0]) > sum(v[1])) swap(v[0], v[1]);
        vector<int> ans(n + 1);
        for (int x : v[0]) ans[x] = 1;
        for (int x : v[1]) ans[x] = 2;
        for (int x : v[2]) ans[x] = 3;
        for (int i = 1; i <= n; i++) {
            cout << ans[i] << ' ';
        }
        cout << '\n';
    } else if (n % 3 == 1) {
        cout << "IMPOSSIBLE\n";
    } else {
        vector<vector<int>> v = {{1, 3}, {5}, {2, 4}};
        int cur = 3;
        for (int i = 5; i < n; i++) {
            if ((i - 5) % 3 == 0) cur--;
            v[cur % 3].push_back(i + 1); 
            cur++;
        }
        if (sum(v[0]) > sum(v[1])) swap(v[0], v[1]);
        if (sum(v[1]) > sum(v[2])) swap(v[1], v[2]);
        if (sum(v[0]) > sum(v[1])) swap(v[0], v[1]);
        vector<int> ans(n + 1);
        for (int x : v[0]) ans[x] = 1;
        for (int x : v[1]) ans[x] = 2;
        for (int x : v[2]) ans[x] = 3;
        for (int i = 1; i <= n; i++) {
            cout << ans[i] << ' ';
        }
        cout << '\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 2 1 2 3 2 1 3` view save

Test 7

Group: 1, 2

Verdict: WRONG ANSWER

input
`9` view save

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

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

Test 14

Group: 2

Verdict: WRONG ANSWER

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 3 1 2 2 3 1 1 2 3 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 (fishy15)