CSES - Datatähti Open 2021 - Results
Submission details
Task:Split in Three
Sender:Ausca
Submission time:2021-01-29 22:27:28 +0200
Language:C++ (C++17)
Status:READY
Result:22
Feedback
groupverdictscore
#1ACCEPTED22
#20
Test results
testverdicttimegroup
#1ACCEPTED0.01 s1, 2details
#2ACCEPTED0.01 s1, 2details
#3ACCEPTED0.01 s1, 2details
#4ACCEPTED0.01 s1, 2details
#5ACCEPTED0.01 s1, 2details
#6ACCEPTED0.01 s1, 2details
#7ACCEPTED0.01 s1, 2details
#8ACCEPTED0.01 s1, 2details
#9ACCEPTED0.01 s2details
#100.01 s2details
#11ACCEPTED0.01 s2details
#12ACCEPTED0.01 s2details
#13ACCEPTED0.01 s2details
#14ACCEPTED0.01 s2details
#15ACCEPTED0.01 s2details

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;
// for (int N = 3; N <= 100; 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';
// continue;
}
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;
}
}
}
int sm[3] = {0, 0, 0};
for (int i = 1; i <= N; i++) {
sm[ans[i]-1] += i;
}
// cout << sm[0] << " " << sm[1] << " " << sm[2] << '\n';
//// }
for (int i = 1; i <= N; i++) {
cout << ans[i] << '\n';
}
return 0;
}

Test details

Test 1

Group: 1, 2

Verdict: ACCEPTED

input
3

correct output
1 2 3 

user output
1
2
3

Test 2

Group: 1, 2

Verdict: ACCEPTED

input
4

correct output
IMPOSSIBLE

user output
IMPOSSIBLE
0
0
0
-4912

Test 3

Group: 1, 2

Verdict: ACCEPTED

input
5

correct output
1 3 1 3 2 

user output
1
3
1
3
2

Test 4

Group: 1, 2

Verdict: ACCEPTED

input
6

correct output
1 3 2 2 1 3 

user output
2
1
3
1
3
...

Test 5

Group: 1, 2

Verdict: ACCEPTED

input
7

correct output
IMPOSSIBLE

user output
IMPOSSIBLE
0
-870747648
-1121158093
0
...

Test 6

Group: 1, 2

Verdict: ACCEPTED

input
8

correct output
2 3 1 2 3 3 2 1 

user output
2
3
3
2
1
...

Test 7

Group: 1, 2

Verdict: ACCEPTED

input
9

correct output
1 2 3 1 2 3 3 2 1 

user output
1
2
3
1
2
...

Test 8

Group: 1, 2

Verdict: ACCEPTED

input
10

correct output
IMPOSSIBLE

user output
IMPOSSIBLE
0
2144443392
690534428
0
...

Test 9

Group: 2

Verdict: ACCEPTED

input
42

correct output
1 3 2 2 1 3 1 2 3 3 2 1 1 2 3 ...

user output
1
2
3
1
2
...

Test 10

Group: 2

Verdict:

input
95

correct output
1 3 1 3 2 1 2 3 3 2 1 1 2 3 3 ...

user output
1
2
1
1
2
...
Truncated

Test 11

Group: 2

Verdict: ACCEPTED

input
96

correct output
1 3 2 2 1 3 1 2 3 3 2 1 1 2 3 ...

user output
1
2
3
1
2
...
Truncated

Test 12

Group: 2

Verdict: ACCEPTED

input
97

correct output
IMPOSSIBLE

user output
IMPOSSIBLE
0
1422152064
5461
1429325408
...
Truncated

Test 13

Group: 2

Verdict: ACCEPTED

input
98

correct output
2 3 1 2 3 3 2 1 1 2 3 3 2 1 1 ...

user output
1
1
1
1
1
...
Truncated

Test 14

Group: 2

Verdict: ACCEPTED

input
99

correct output
1 2 3 1 2 3 3 2 1 1 2 3 3 2 1 ...

user output
1
2
3
1
2
...
Truncated

Test 15

Group: 2

Verdict: ACCEPTED

input
100

correct output
IMPOSSIBLE

user output
IMPOSSIBLE
5461
1425652800
5461
0
...
Truncated