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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#681#117. 【0621 模拟赛】TROKUTIgctiruct100935ms9312kbC++14976b2025-06-21 15:55:452025-06-21 23:52:11

answer

#include <bits/stdc++.h>
#define int long long
using namespace std;

#define PII pair<int,int>
#define x first
#define y second
const int N = 300010, P = 1e9+7;

struct Node
{
	int p, q;
	void fun()
	{
		if(p == 0)
		{
			q = 0;
			return ;
		}
		int f = 1;
		if(p*q < 0)
			f = -1, p = max(p, -p), q = max(q, -q);
		int g = __gcd(p, q);
		p /= g, q /= g;
		p *= f;
		if(p<0 && q<0)
			p = -p, q = -q;
	}
};

int n, c1, c2, ans;
map <PII, int> mp;
int t[N], d1, d2;

signed main()
{
	cin >> n;
	for(int i=3; i<=n; i++)
		t[i] = (i-2)*(i-1)/2;
	for(int i=1,a,b,c; i<=n; i++)
	{
		cin >> a >> b >> c;
		Node x = {-a, b};
		x.fun();
		mp[{x.p, x.q}] ++;
		if(mp[{x.p, x.q}] == 1)
			c1 ++, d1 += t[c1];
		else
			c2 ++;
	}
	ans = d1;
	for(auto p:mp)
	{
		int x = p.second-1;
		if(x == 0)
			continue;
		ans += x * (t[c1] - d2 + P) % P;
		ans %= P;
		c1 += x;
		d2 += t[x+2];
		d2 %= P;
	}
	cout << ans;
	return 0;
}

详细

小提示:点击横条可展开更详细的信息

Subtask #1:

score: 10
Accepted

Test #1:

score: 10
Accepted
time: 1ms
memory: 3400kb

input:

500
73102 49767 81374
73102 49767 92538
73102 49767 13140
73102 49767 24384
73102 49767 27887
17295 ...

output:

20377848

result:

ok "20377848"

Test #2:

score: 0
Accepted
time: 2ms
memory: 3336kb

input:

500
124 63117 7826508
7035 56206 395409210
11693 51548 602750764
9043 54198 490112514
12433 50808 63...

output:

11783400

result:

ok "11783400"

Subtask #2:

score: 10
Accepted

Test #3:

score: 10
Accepted
time: 1ms
memory: 3224kb

input:

500
161481 156950 868380
161481 156950 129078
161481 156950 461965
161481 156950 884496
161481 15695...

output:

20354576

result:

ok "20354576"

Test #4:

score: 0
Accepted
time: 2ms
memory: 3052kb

input:

500
54987 8254 453862698
22821 40420 922424820
55211 8030 443344330
7995 55246 441691770
7536 55705 ...

output:

11783400

result:

ok "11783400"

Subtask #3:

score: 10
Accepted

Test #5:

score: 10
Accepted
time: 1ms
memory: 3292kb

input:

500
1616 7821 6023
1616 7821 1348
1616 7821 1311
1616 7821 8768
1616 7821 3224
1041 342 8905
1041 34...

output:

20376818

result:

ok "20376818"

Test #6:

score: 0
Accepted
time: 1ms
memory: 3336kb

input:

500
28122 35119 987616518
39998 23243 929673514
6803 56438 383947714
10419 52822 550352418
4210 5903...

output:

11783400

result:

ok "11783400"

Subtask #4:

score: 10
Accepted

Test #7:

score: 10
Accepted
time: 7ms
memory: 3424kb

input:

5000
389677 811320 494924
389677 811320 749898
444969 181234 734834
444969 181234 901259
444969 1812...

output:

787588230

result:

ok "787588230"

Test #8:

score: 0
Accepted
time: 6ms
memory: 3576kb

input:

5000
23083 40158 926967114
60406 2835 171251010
24995 38246 955958770
29023 34218 993109014
3991 592...

output:

828333923

result:

ok "828333923"

Subtask #5:

score: 10
Accepted

Test #9:

score: 10
Accepted
time: 6ms
memory: 3512kb

input:

5000
879363 278076 350260
879363 278076 59028
879363 278076 651081
879363 278076 693725
879363 27807...

output:

787932788

result:

ok "787932788"

Test #10:

score: 0
Accepted
time: 4ms
memory: 3420kb

input:

5000
37905 25336 960361080
35770 27471 982637670
52420 10821 567236820
30663 32578 998939214
45883 1...

output:

828333923

result:

ok "828333923"

Subtask #6:

score: 10
Accepted

Test #11:

score: 10
Accepted
time: 8ms
memory: 3512kb

input:

5000
723822 556273 863546
723822 556273 609176
150507 44473 252270
150507 44473 584705
478150 568821...

output:

787762934

result:

ok "787762934"

Test #12:

score: 0
Accepted
time: 7ms
memory: 3304kb

input:

5000
39891 23350 931454850
16346 46895 766545670
33352 29889 996857928
11336 51905 588395080
43183 2...

output:

828333923

result:

ok "828333923"

Subtask #7:

score: 10
Accepted

Test #13:

score: 10
Accepted
time: 15ms
memory: 3584kb

input:

10000
393478769 738556203 6827952
393478769 738556203 523642363
393478769 738556203 876852848
393478...

output:

484345046

result:

ok "484345046"

Test #14:

score: 0
Accepted
time: 275ms
memory: 9312kb

input:

300000
31401 31840 999807840
54120 9121 493628520
46872 16369 767247768
60349 2892 174529308
31055 3...

output:

990696070

result:

ok "990696070"

Subtask #8:

score: 10
Accepted

Test #15:

score: 10
Accepted
time: 25ms
memory: 3656kb

input:

10000
43150731 562981536 60415743
43150731 562981536 458963024
43150731 562981536 368003258
43150731...

output:

483275456

result:

ok "483275456"

Test #16:

score: 0
Accepted
time: 212ms
memory: 8600kb

input:

210000
56426 6815 384543190
17171 46070 791067970
31577 31664 999854128
10214 53027 541617778
27620 ...

output:

695778049

result:

ok "695778049"

Subtask #9:

score: 10
Accepted

Test #17:

score: 10
Accepted
time: 18ms
memory: 3552kb

input:

10000
226922248 948048502 664992202
226922248 948048502 970629073
226922248 948048502 51606080
22692...

output:

481876198

result:

ok "481876198"

Test #18:

score: 0
Accepted
time: 245ms
memory: 8928kb

input:

249243
17136 46105 790055280
49548 13693 678460764
6857 56384 386625088
32641 30600 998814600
26037 ...

output:

916345391

result:

ok "916345391"

Subtask #10:

score: 10
Accepted

Test #19:

score: 10
Accepted
time: 17ms
memory: 3552kb

input:

10000
176721617 620409850 489941614
816064587 763087269 5642316
816064587 763087269 362859512
816064...

output:

482006082

result:

ok "482006082"

Test #20:

score: 0
Accepted
time: 82ms
memory: 6048kb

input:

77777
23811 39430 938867730
5264 57977 305190928
7972 55269 440604468
27186 36055 980191230
29278 33...

output:

815976874

result:

ok "815976874"