CSES - Putka Open 2020 – 5/5

Submission details
Task:	Pyramidi
Sender:	kluopaja
Submission time:	2020-11-28 00:26:43 +0200
Language:	C++ (C++17)
Status:	READY
Result:	100

Feedback
group	verdict	score
#1	ACCEPTED	17
#2	ACCEPTED	83

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	1, 2	details
#10	ACCEPTED	0.01 s	1, 2	details
#11	ACCEPTED	0.01 s	1, 2	details
#12	ACCEPTED	0.01 s	1, 2	details
#13	ACCEPTED	0.01 s	1, 2	details
#14	ACCEPTED	0.01 s	1, 2	details
#15	ACCEPTED	0.01 s	1, 2	details
#16	ACCEPTED	0.09 s	2	details
#17	ACCEPTED	0.09 s	2	details
#18	ACCEPTED	0.09 s	2	details
#19	ACCEPTED	0.09 s	2	details
#20	ACCEPTED	0.09 s	2	details

Code

#include <iostream>
#include <vector>
#include <map>
using namespace std;

using ll = long long;
constexpr ll MOD = 1e9+7;
constexpr ll N_MAX = 2e5+100;
ll fact_2_exps[N_MAX];
ll nCk_mod2(int n, int k) {
	return (fact_2_exps[n] - fact_2_exps[k] - fact_2_exps[n-k] == 0);
}
int main() {
	fact_2_exps[0] = 0;
	for(int i = 1; i < N_MAX; ++i) {
		fact_2_exps[i] = fact_2_exps[i-1];
		int tmp = i;
		for(; tmp%2 == 0; tmp/=2) {
			++fact_2_exps[i];
		}
	}
	int n;
	cin>>n;
	std::vector<int> v(n);
	for(int i = 0; i < n; ++i) {
		cin>>v[i];
	}
	std::vector<int> mod_counts(n);
	for(int i = 0; i < n; ++i) {
		mod_counts[i] = nCk_mod2(n-1, i);
	}
	int ans = 0;
	for(int i = 0; i <= 30; ++i) {
		for(int j = 0; j < n; ++j) {
			if(mod_counts[j]) {
				ans ^= (v[j] & (1<<i));
			}
		}
	}
	cout << ans << std::endl;
}

Test details

Test 1

Group: 1, 2

Verdict: ACCEPTED

input
`1 80` view save

correct output
`80` view save

user output
`80` view save

Test 2

Group: 1, 2

Verdict: ACCEPTED

input
`2 69 91` view save

correct output
`30` view save

user output
`30` view save

Test 3

Group: 1, 2

Verdict: ACCEPTED

input
`3 47 74 75` view save

correct output
`100` view save

user output
`100` view save

Test 4

Group: 1, 2

Verdict: ACCEPTED

input
`4 94 22 100 43` view save

correct output
`7` view save

user output
`7` view save

Test 5

Group: 1, 2

Verdict: ACCEPTED

input
`5 50 82 47 40 51` view save

correct output
`1` view save

user output
`1` view save

Test 6

Group: 1, 2

Verdict: ACCEPTED

input
`6 90 27 98 85 47 14` view save

correct output
`96` view save

user output
`96` view save

Test 7

Group: 1, 2

Verdict: ACCEPTED

input
`7 55 82 52 9 65 90 86` view save

correct output
`20` view save

user output
`20` view save

Test 8

Group: 1, 2

Verdict: ACCEPTED

input
`8 45 52 52 95 40 85 3 46` view save

correct output
`34` view save

user output
`34` view save

Test 9

Group: 1, 2

Verdict: ACCEPTED

input
`9 77 16 59 32 22 41 87 89 78` view save

correct output
`3` view save

user output
`3` view save

Test 10

Group: 1, 2

Verdict: ACCEPTED

input
`10 59 78 34 26 71 9 82 68 80 74` view save

correct output
`111` view save

user output
`111` view save

Test 11

Group: 1, 2

Verdict: ACCEPTED

input
`100 100 6 10 53 84 80 7 87 3 82 26...` view save

correct output
`91` view save

user output
`91` view save

Test 12

Group: 1, 2

Verdict: ACCEPTED

input
`100 25 18 62 51 79 55 71 33 21 29 ...` view save

correct output
`58` view save

user output
`58` view save

Test 13

Group: 1, 2

Verdict: ACCEPTED

input
`100 3 20 19 60 11 84 94 79 63 59 9...` view save

correct output
`124` view save

user output
`124` view save

Test 14

Group: 1, 2

Verdict: ACCEPTED

input
`100 99 86 42 2 97 78 8 12 98 7 98 ...` view save

correct output
`49` view save

user output
`49` view save

Test 15

Group: 1, 2

Verdict: ACCEPTED

input
`100 19 19 14 30 80 53 21 18 26 85 ...` view save

correct output
`42` view save

user output
`42` view save

Test 16

Group: 2

Verdict: ACCEPTED

input
`200000 852837035 608724072 368935143 ...` view save

correct output
`680579671` view save

user output
`680579671` view save

Test 17

Group: 2

Verdict: ACCEPTED

input
`200000 255817977 550740070 115276527 ...` view save

correct output
`177586289` view save

user output
`177586289` view save

Test 18

Group: 2

Verdict: ACCEPTED

input
`200000 30889540 9467827 526159961 367...` view save

correct output
`439343644` view save

user output
`439343644` view save

Test 19

Group: 2

Verdict: ACCEPTED

input
`200000 421000302 598694653 199802169 ...` view save

correct output
`184880259` view save

user output
`184880259` view save

Test 20

Group: 2

Verdict: ACCEPTED

input
`200000 578873143 289492857 855880936 ...` view save

correct output
`937457144` view save

user output
`937457144` view save

Putka Open 2020 – 5/5

Pyramidi

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

Tasks

Submissions (kluopaja)