CSES - Datatähti Open 2019 - Results
Submission details
Task:Function
Sender:ainta1
Submission time:2019-01-19 08:21:01
Language:C++
Status:READY
Result:100
Feedback
groupverdictscore
#1ACCEPTED45
#2ACCEPTED55
Test results
testverdicttimegroup
#1ACCEPTED0.01 s1details
#2ACCEPTED0.01 s1details
#3ACCEPTED0.01 s1details
#4ACCEPTED0.01 s1details
#5ACCEPTED0.05 s1details
#6ACCEPTED0.03 s1details
#7ACCEPTED0.04 s1details
#8ACCEPTED0.02 s1details
#9ACCEPTED0.02 s1details
#10ACCEPTED0.01 s2details
#11ACCEPTED0.01 s2details
#12ACCEPTED0.04 s2details
#13ACCEPTED0.01 s2details
#14ACCEPTED0.06 s2details
#15ACCEPTED0.06 s2details
#16ACCEPTED0.06 s2details
#17ACCEPTED0.06 s2details
#18ACCEPTED0.04 s2details
#19ACCEPTED0.03 s2details
#20ACCEPTED0.04 s2details
#21ACCEPTED0.01 s2details
#22ACCEPTED0.33 s2details
#23ACCEPTED0.29 s2details
#24ACCEPTED0.29 s2details
#25ACCEPTED0.35 s2details
#26ACCEPTED0.31 s2details
#27ACCEPTED0.33 s2details
#28ACCEPTED0.20 s2details
#29ACCEPTED0.25 s2details
#30ACCEPTED0.01 s2details
#31ACCEPTED0.01 s2details
#32ACCEPTED0.01 s2details
#33ACCEPTED0.01 s2details
#34ACCEPTED0.06 s2details
#35ACCEPTED0.34 s2details

Compiler report

input/code.cpp: In function 'void Solve()':
input/code.cpp:20:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
input/code.cpp:22:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld%lld", &w[i].x, &w[i].y);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
input/code.cpp: In function 'int main()':
input/code.cpp:37:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &TC);
  ~~~~~^~~~~~~~~~~

Code

#include<cstdio>
#include<algorithm>
using namespace std;
struct point {
	long long x, y;
	point operator -(const point &p)const {
		return { x - p.x,y - p.y };
	}
	bool operator <(const point &p)const {
		if ((x > 0 || (x == 0 && y > 0)) != (p.x > 0 || (p.x == 0 && p.y > 0)))return (x > 0 || (x == 0 && y > 0));
		return y* p.x < p.y*x;
	}
}w[1010000];
long long AA(point a, point b) {
	return a.x*b.y - a.y*b.x;
}
int TC, n;
void Solve() {
	int i;
	scanf("%d", &n);
	for (i = 1; i <= n; i++) {
		scanf("%lld%lld", &w[i].x, &w[i].y);
	}
	for (i = 1; i < n; i++)w[i] = w[i + 1] - w[i];
	sort(w + 1, w + n);
	w[n] = w[1];
	for (i = 1; i < n; i++) {
		if (AA(w[i], w[i + 1]) < 0) {
			puts("YES");
			return;
		}
	}
	if (n == 2)puts("YES");
	else puts("NO");
}
int main() {
	scanf("%d", &TC);
	while (TC--) {
		Solve();
	}
}

Test details

Test 1

Group: 1

Verdict: ACCEPTED

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: ACCEPTED

input
100
4
87 81
-84 42
18 -46
...

correct output
YES
YES
YES
YES
YES
...

user output
YES
YES
YES
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: ACCEPTED

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: ACCEPTED

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: ACCEPTED

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: ACCEPTED

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

correct output
NO
NO
NO
NO
YES
...

user output
NO
NO
NO
NO
YES
...

Test 33

Group: 2

Verdict: ACCEPTED

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

correct output
NO
NO
YES
NO
NO
...

user output
NO
NO
YES
NO
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
...