CSES - Datatähti 2019 loppu - Results
Submission details
Task:Funktio
Sender:Pekka Ristola
Submission time:2019-01-17 16:49:41
Language:C++
Status:READY
Result:0
Feedback
groupverdictscore
#10
#20
Test results
testverdicttimegroup
#10.01 s1details
#2ACCEPTED0.03 s1details
#3ACCEPTED0.01 s1details
#40.02 s1details
#5ACCEPTED0.05 s1details
#6ACCEPTED0.03 s1details
#7ACCEPTED0.03 s1details
#8ACCEPTED0.02 s1details
#9ACCEPTED0.02 s1details
#100.02 s2details
#11ACCEPTED0.01 s2details
#12ACCEPTED0.03 s2details
#130.02 s2details
#14ACCEPTED0.05 s2details
#15ACCEPTED0.06 s2details
#16ACCEPTED0.07 s2details
#17ACCEPTED0.06 s2details
#18ACCEPTED0.04 s2details
#19ACCEPTED0.04 s2details
#20ACCEPTED0.04 s2details
#210.02 s2details
#22ACCEPTED0.33 s2details
#23ACCEPTED0.36 s2details
#24ACCEPTED0.35 s2details
#25ACCEPTED0.34 s2details
#26ACCEPTED0.34 s2details
#27ACCEPTED0.34 s2details
#28ACCEPTED0.17 s2details
#29ACCEPTED0.24 s2details
#30ACCEPTED0.02 s2details
#31ACCEPTED0.02 s2details
#320.02 s2details
#330.01 s2details
#34ACCEPTED0.05 s2details
#35ACCEPTED0.32 s2details

Code

#include <cmath>
#include <iostream>
#include <vector>
//#include <bits/stdc++.h>

using namespace std;

typedef unsigned int ui;
typedef unsigned long ul;

constexpr double PI = acos((double) -1);

inline double angle(long y, long x) {
	double r = atan2(y, x);
	return r;
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	ui t;
	cin >> t;
	for (ui i = 0; i < t; i++) {
		ul n;
		cin >> n;
		vector<long> px(n), py(n);
		for (ul j = 0; j < n; j++) {
			cin >> px[j] >> py[j];
		}
		double pa = angle(py[1]-py[0], px[1]-px[0]), maxa = pa, mina = pa;
		bool msg = true;
		for (ul j = 1; j < n - 1; j++) {
			double a = angle(py[j+1]-py[j], px[j+1]-px[j]);
			double d = a - pa;
			if (d <= -PI) d += 2*PI;
			else if (d > PI) d -= 2*PI;
			if (d > 0) maxa = max(maxa, pa + d);
			else mina = min(mina, pa + d);
			if (maxa - mina >= PI) {
				msg = false;
				break;
			}
			pa = a;
		}
		cout << (msg ? "YES\n" : "NO\n");
	}

	return 0;
}

Test details

Test 1

Group: 1

Verdict:

input
12
2
0 0
1 1
5
...

correct output
YES
YES
NO
YES
YES
...

user output
YES
YES
NO
YES
YES
...

Test 2

Group: 1

Verdict: ACCEPTED

input
100
2
92 30
22 44
2
...

correct output
YES
YES
YES
YES
YES
...

user output
YES
YES
YES
YES
YES
...

Test 3

Group: 1

Verdict: ACCEPTED

input
100
3
-55 -98
-59 -55
-2 88
...

correct output
YES
YES
YES
YES
YES
...

user output
YES
YES
YES
YES
YES
...

Test 4

Group: 1

Verdict:

input
100
4
87 81
-84 42
18 -46
...

correct output
YES
YES
YES
YES
YES
...

user output
YES
YES
NO
YES
YES
...

Test 5

Group: 1

Verdict: ACCEPTED

input
100
1000
-81 38
92 -21
-10 -65
...

correct output
NO
NO
NO
NO
NO
...

user output
NO
NO
NO
NO
NO
...

Test 6

Group: 1

Verdict: ACCEPTED

input
100
110
-99 -9
-98 -9
-96 -8
...

correct output
NO
NO
NO
NO
NO
...

user output
NO
NO
NO
NO
NO
...

Test 7

Group: 1

Verdict: ACCEPTED

input
100
78
-100 95
-99 96
-98 95
...

correct output
NO
NO
NO
NO
NO
...

user output
NO
NO
NO
NO
NO
...

Test 8

Group: 1

Verdict: ACCEPTED

input
100
201
-100 97
-100 96
-99 99
...

correct output
NO
NO
NO
NO
NO
...

user output
NO
NO
NO
NO
NO
...

Test 9

Group: 1

Verdict: ACCEPTED

input
100
45
-100 89
-100 90
-97 90
...

correct output
YES
NO
NO
NO
NO
...

user output
YES
NO
NO
NO
NO
...

Test 10

Group: 2

Verdict:

input
13
2
0 0
1 1
5
...

correct output
YES
YES
NO
YES
YES
...

user output
YES
YES
NO
YES
YES
...

Test 11

Group: 2

Verdict: ACCEPTED

input
100
2
-517113909 -39540276
-209411537 -831819487
2
...

correct output
YES
YES
YES
YES
YES
...

user output
YES
YES
YES
YES
YES
...

Test 12

Group: 2

Verdict: ACCEPTED

input
100
3
-991349544 139282777
646238126 16140762
-4488261 817588303
...

correct output
YES
YES
YES
YES
YES
...

user output
YES
YES
YES
YES
YES
...

Test 13

Group: 2

Verdict:

input
100
4
891187584 -889373775
-453505448 -469134344
-683807769 8725517
...

correct output
YES
NO
YES
NO
NO
...

user output
YES
NO
YES
NO
NO
...

Test 14

Group: 2

Verdict: ACCEPTED

input
100
1000
-866614983 -994037153
775605588 -328510132
390868551 927606059
...

correct output
NO
NO
NO
NO
NO
...

user output
NO
NO
NO
NO
NO
...

Test 15

Group: 2

Verdict: ACCEPTED

input
100
1000
-911073332 -1000000000
-905159999 -1000000000
-904949593 -999999999
...

correct output
YES
YES
YES
NO
NO
...

user output
YES
YES
YES
NO
NO
...

Test 16

Group: 2

Verdict: ACCEPTED

input
100
1000
-1000000000 950042028
-946551105 -1000000000
-940508390 -1000000000
...

correct output
NO
YES
YES
YES
NO
...

user output
NO
YES
YES
YES
NO
...

Test 17

Group: 2

Verdict: ACCEPTED

input
100
1000
-949977239 -1000000000
-948279892 -1000000000
-947497811 -999999999
...

correct output
YES
YES
YES
YES
YES
...

user output
YES
YES
YES
YES
YES
...

Test 18

Group: 2

Verdict: ACCEPTED

input
100
806
-899 -1000
-898 -1000
-896 -999
...

correct output
NO
NO
NO
NO
NO
...

user output
NO
NO
NO
NO
NO
...

Test 19

Group: 2

Verdict: ACCEPTED

input
100
777
-1000 914
-1000 915
-999 916
...

correct output
NO
NO
NO
NO
NO
...

user output
NO
NO
NO
NO
NO
...

Test 20

Group: 2

Verdict: ACCEPTED

input
100
775
-999 998
-995 -1000
-994 -1000
...

correct output
NO
NO
NO
NO
NO
...

user output
NO
NO
NO
NO
NO
...

Test 21

Group: 2

Verdict:

input
13
2
0 0
1 1
5
...

correct output
YES
YES
NO
YES
YES
...

user output
YES
YES
NO
YES
YES
...

Test 22

Group: 2

Verdict: ACCEPTED

input
1
999748
-995394098 -1000000000
-995392159 -1000000000
-995386584 -999999999
...

correct output
NO

user output
NO

Test 23

Group: 2

Verdict: ACCEPTED

input
1
1000000
-954368893 -1000000000
-954366895 -1000000000
-954364896 -999999999
...

correct output
YES

user output
YES

Test 24

Group: 2

Verdict: ACCEPTED

input
1
1000000
-1000000000 928772368
-1000000000 928772506
-999999999 928772642
...

correct output
YES

user output
YES

Test 25

Group: 2

Verdict: ACCEPTED

input
1
999754
-901705699 -1000000000
-901702695 -1000000000
-901702062 -999999999
...

correct output
NO

user output
NO

Test 26

Group: 2

Verdict: ACCEPTED

input
100
10000
-1000000000 919783772
-918885599 -1000000000
-918825263 -1000000000
...

correct output
NO
YES
YES
NO
NO
...

user output
NO
YES
YES
NO
NO
...

Test 27

Group: 2

Verdict: ACCEPTED

input
10
99998
-997024120 -77018772
-997011201 -77017738
-996986132 -77015834
...

correct output
YES
YES
NO
YES
YES
...

user output
YES
YES
NO
YES
YES
...

Test 28

Group: 2

Verdict: ACCEPTED

input
100
7934
-10000 9905
-10000 9906
-9999 9906
...

correct output
NO
NO
NO
NO
NO
...

user output
NO
NO
NO
NO
NO
...

Test 29

Group: 2

Verdict: ACCEPTED

input
100
9710
-99754 -6983
-99786 -6055
-99751 -6548
...

correct output
YES
NO
NO
NO
NO
...

user output
YES
NO
NO
NO
NO
...

Test 30

Group: 2

Verdict: ACCEPTED

input
100
2
802396401 -641287652
30956766 -527704723
2
...

correct output
YES
YES
YES
YES
YES
...

user output
YES
YES
YES
YES
YES
...

Test 31

Group: 2

Verdict: ACCEPTED

input
100
3
755025461 -953536159
-402145543 137775005
-700733185 821755784
...

correct output
YES
YES
YES
YES
YES
...

user output
YES
YES
YES
YES
YES
...

Test 32

Group: 2

Verdict:

input
100
4
-673213071 571383249
-963633735 -859013318
-591788323 791136643
...

correct output
NO
NO
NO
NO
YES
...

user output
NO
YES
NO
YES
YES
...

Test 33

Group: 2

Verdict:

input
100
5
-124483012 623794901
233757283 -234519096
-987338502 737259422
...

correct output
NO
NO
YES
NO
NO
...

user output
NO
NO
YES
YES
NO
...

Test 34

Group: 2

Verdict: ACCEPTED

input
100
1000
154383911 872030445
-9594726 190227899
908758769 -9615631
...

correct output
NO
NO
NO
NO
NO
...

user output
NO
NO
NO
NO
NO
...

Test 35

Group: 2

Verdict: ACCEPTED

input
100
10000
642800667 -694556052
-343795089 -341227394
800920828 676674460
...

correct output
NO
NO
NO
NO
NO
...

user output
NO
NO
NO
NO
NO
...