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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
#213086#2675. Road Reformquliannanyishou1002253ms4316kbC++11931b2024-11-09 19:32:232024-11-09 23:08:03

answer

#include <bits/stdc++.h>
using namespace std;
int m,n,k,fa[200010],a,b,c,cnt=1,x,y,cnt1=1,min1=1e9+1,min2=1e9+1;
long long ans;
struct hh
{
	int u;
	int v;
	int w;
	const bool operator<(const hh&x) const
	{
		return w<x.w;
	}
}d[200010];
int find(int x)
{
	if(fa[x]!=x)
	{
		fa[x]=find(fa[x]);
	}
	return fa[x];
}
int main()
{
	cin>>m>>n>>k;
	for(int i=1;i<=m;++i)
	{
		fa[i]=i;
	}
	for(int i=1;i<=n;++i)
	{
		cin>>a>>b>>c;
		if(c<=k)
		{
			x=find(a);
			y=find(b);
			if(x!=y)
			{
				fa[x]=y;
				cnt++;
			}
			min1=min(min1,k-c);
		}
		else
		{
			d[cnt1].u=a;
			d[cnt1].v=b;
			d[cnt1++].w=c;
			min2=min(min2,c-k);
		}
	}
	if(cnt==m)
	{
		cout<<min(min2,min1);
		return 0;
	}
	sort(d+1,d+cnt1);
	cnt1=1;
	while(cnt<m)
	{
		x=find(d[cnt1].u);
		y=find(d[cnt1].v);
		if(x!=y)
		{
			fa[x]=y;
			cnt++;
			ans+=d[cnt1].w-k;
		}
		cnt1++;
	}
	cout<<ans;
}

详细

小提示:点击横条可展开更详细的信息

Test #1:

score: 5
Accepted
time: 0ms
memory: 1220kb

input:

20 80 10
11 10 207
8 15 45
2 9 253
10 8 91
10 14 174
20 19 272
20 3 69
4 7 9
19 12 192
3 5 21
20 1 2...

output:

651

result:

ok single line: '651'

Test #2:

score: 5
Accepted
time: 0ms
memory: 1220kb

input:

20 80 10
8 15 24
16 14 128
7 9 8
6 1 12
4 11 273
9 14 238
8 17 155
11 5 220
15 10 132
17 7 10
9 18 1...

output:

569

result:

ok single line: '569'

Test #3:

score: 5
Accepted
time: 0ms
memory: 1220kb

input:

20 80 10
1 13 196
6 2 133
11 14 193
4 11 148
11 19 21
16 15 84
3 19 201
5 15 286
11 16 161
12 13 296...

output:

633

result:

ok single line: '633'

Test #4:

score: 5
Accepted
time: 0ms
memory: 1220kb

input:

20 80 10
5 15 33
9 13 52
9 5 48
8 3 251
6 9 281
8 9 111
18 17 48
8 14 145
19 15 299
4 20 88
6 2 281
...

output:

596

result:

ok single line: '596'

Test #5:

score: 5
Accepted
time: 0ms
memory: 1216kb

input:

20 80 10
6 15 124
7 15 242
6 5 172
11 2 46
3 4 273
2 4 173
7 9 175
9 16 264
17 14 15
16 17 211
8 18 ...

output:

989

result:

ok single line: '989'

Test #6:

score: 5
Accepted
time: 0ms
memory: 1216kb

input:

20 80 10
6 5 252
2 20 182
20 14 107
5 15 128
4 10 283
8 17 21
2 17 203
9 4 289
18 4 218
3 15 25
10 9...

output:

571

result:

ok single line: '571'

Test #7:

score: 5
Accepted
time: 75ms
memory: 2292kb

input:

2000 100000 800
1287 1255 1987
1744 883 836
149 1453 1336
351 1172 1071
850 1465 848
740 1675 863
11...

output:

6

result:

ok single line: '6'

Test #8:

score: 5
Accepted
time: 78ms
memory: 2292kb

input:

2000 100000 800
540 62 1546
684 1940 1135
506 1341 1784
1850 361 1977
18 140 1635
1651 1916 1907
199...

output:

57

result:

ok single line: '57'

Test #9:

score: 5
Accepted
time: 74ms
memory: 2296kb

input:

2000 100000 800
1450 642 1197
990 388 1850
1656 809 1402
725 786 1349
613 1059 890
1259 1575 1064
95...

output:

1

result:

ok single line: '1'

Test #10:

score: 5
Accepted
time: 85ms
memory: 2268kb

input:

2000 100000 10000000
232 194 5205389
1290 1320 94756446
1596 1172 8604877
1838 1057 38095640
1301 54...

output:

169

result:

ok single line: '169'

Test #11:

score: 5
Accepted
time: 84ms
memory: 2268kb

input:

2000 100000 10000000
1377 361 48147042
1023 1928 5049880
1696 843 14727225
920 1294 58661444
1665 51...

output:

533

result:

ok single line: '533'

Test #12:

score: 5
Accepted
time: 92ms
memory: 2280kb

input:

2000 100000 10000000
23 1840 61297021
1090 1814 98946038
1413 1691 85852947
86 1463 92991569
1268 82...

output:

230103

result:

ok single line: '230103'

Test #13:

score: 5
Accepted
time: 223ms
memory: 4312kb

input:

200000 200000 10000000
163447 52269 827108961
69433 60328 8764874
184517 157379 878957413
2825 13277...

output:

98144644196729

result:

ok single line: '98144644196729'

Test #14:

score: 5
Accepted
time: 224ms
memory: 4316kb

input:

200000 200000 10000000
26437 26449 733968315
72457 129890 760533116
45625 117585 453891083
113120 65...

output:

97982017911608

result:

ok single line: '97982017911608'

Test #15:

score: 5
Accepted
time: 237ms
memory: 4316kb

input:

200000 200000 10000000
134481 172469 958604013
187505 51187 883335613
78523 97379 748522908
76899 44...

output:

98108458217572

result:

ok single line: '98108458217572'

Test #16:

score: 5
Accepted
time: 209ms
memory: 4312kb

input:

200000 200000 10000000
31044 159067 847353551
87451 43252 982699932
138867 5542 154557540
83604 6864...

output:

98165693118564

result:

ok single line: '98165693118564'

Test #17:

score: 5
Accepted
time: 215ms
memory: 4312kb

input:

200000 200000 10000000
19846 69397 59750638
19566 101018 183206436
7465 190436 164547218
192600 1650...

output:

98270021595856

result:

ok single line: '98270021595856'

Test #18:

score: 5
Accepted
time: 225ms
memory: 4316kb

input:

200000 200000 10000000
75029 14324 856954422
6328 45799 557275111
92416 7355 61760133
58432 149196 6...

output:

98016594710576

result:

ok single line: '98016594710576'

Test #19:

score: 5
Accepted
time: 216ms
memory: 4312kb

input:

200000 200000 10000000
50062 13355 435813272
161002 4865 505414563
118169 48194 579627562
139289 413...

output:

98085543969676

result:

ok single line: '98085543969676'

Test #20:

score: 5
Accepted
time: 216ms
memory: 4312kb

input:

200000 200000 10000000
5476 97888 999474454
20665 24758 972246854
170123 118973 486801275
114106 174...

output:

97937044812669

result:

ok single line: '97937044812669'