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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
#316117#8136. Rebellious Edgeucup-team134#WA 48ms13484kbC++171.6kb2024-01-27 17:32:092024-01-27 17:32:11

Judging History

你现在查看的是最新测评结果

  • [2024-01-27 17:32:11]
  • 评测
  • 测评结果:WA
  • 用时:48ms
  • 内存:13484kb
  • [2024-01-27 17:32:09]
  • 提交

answer

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

const int N=200050;
vector<pair<int,int>> E[N];
vector<int> T[N];
int par[N];
bool on[N];
void DFS(int u){
	on[u]=true;
	for(int v:T[u]){
		if(!on[v]){
			DFS(v);
		}
	}
}

const ll inf=1e18;
int main(){
	int t;
	scanf("%i",&t);
	while(t--){
		int n,m;
		scanf("%i %i",&n,&m);
		int x,y,z;
		for(int i=1;i<=m;i++){
			int u,v,w;
			scanf("%i %i %i",&u,&v,&w);
			if(u>v){
				x=u;
				y=v;
				z=w;
			}else{
				E[v].pb({u,w});
			}
		}
		ll ans=0;
		int cnt=0;
		for(int i=2;i<=n;i++){
			sort(E[i].begin(),E[i].end(),[](pair<int,int> a,pair<int,int> b){return a.second<b.second;});
			if(E[i].size()){
				par[i]=E[i][0].first;
				T[par[i]].pb(i);
				ans+=E[i][0].second;
				cnt++;
			}
		}
		ll sol=inf;
		if(cnt==n-1)sol=ans;

		if(y!=1){
			ans+=z;
			cnt++;
			if(par[y]!=0){
				ans-=E[y][0].second;
				cnt--;
			}
			bool cyc=false;
			for(int u=x;u!=0;u=par[u]){
				if(u==y)cyc=true;
			}
			if(!cyc){
				sol=min(sol,ans);
			}else{
				DFS(y);
				for(int u=x;u!=y;u=par[u]){
					ll delta=-E[u][0].second;
					if(cnt==n){
						sol=min(sol,ans+delta);
					}else{
						ll mn=inf;
						for(int i=0;i<E[u].size();i++){
							if(!on[E[u][i].first]){
								mn=min(mn,(ll)E[u][i].second);
							}
						}
						sol=min(sol,ans+delta+mn);
					}
				}
			}
		}

		printf("%lld\n",sol);

		for(int i=1;i<=n;i++){
			E[i].clear();
			T[i].clear();
			par[i]=0;
			on[i]=false;
		}
	}
	return 0;
}

详细

Test #1:

score: 100
Accepted
time: 3ms
memory: 13372kb

input:

3
5 6
1 2 4
1 3 2
2 3 0
3 4 1
4 5 1
5 2 1
4 4
1 2 4
1 3 6
1 4 8
4 2 1000000
3 3
1 2 100
2 1 10
2 3 1000

output:

5
18
1100

result:

ok 3 number(s): "5 18 1100"

Test #2:

score: 0
Accepted
time: 39ms
memory: 13484kb

input:

50000
4 5
2 4 998973548
2 3 501271695
4 1 778395982
1 4 32454891
1 2 757288934
4 5
1 4 720856669
2 3 665098951
3 4 407461517
2 1 866914401
1 2 457859826
4 5
1 2 75288664
1 4 624893594
3 2 458973866
2 4 769074655
2 3 834773751
4 5
2 3 237060634
2 4 297307882
3 4 200383586
1 2 42856502
3 1 16574713
4 ...

output:

1291015520
1530420294
1534956009
480300722
1366795927
1541095843
2493849488
858095911
1034153425
793861088
605832428
1051598350
612891589
1265994009
517769091
1678219738
1556463491
93634961
960978736
984886788
1696503797
1002892611
1969660290
1431417780
1515267731
977157479
1937478556
654475526
1401...

result:

ok 50000 numbers

Test #3:

score: -100
Wrong Answer
time: 48ms
memory: 13184kb

input:

50000
4 6
1 3 754771977
2 3 517886121
1 4 392356144
1 2 702785740
3 4 888230940
2 1 829304957
4 6
2 4 255940037
1 2 380616616
1 4 819140865
3 4 36965607
1 3 496378345
4 3 652252309
4 6
2 4 179216787
4 2 401136502
1 2 715271531
1 3 859345710
3 4 24470489
1 4 148650889
4 6
3 2 20348069
1 2 152861663
1...

output:

1613028005
913960568
1284952701
1294564551
199037829
1236121455
983447828
1161647829
1289612543
2444304029
431872921
1272140390
949528400
2328941976
696541797
363553357
999320657
2221495861
879052116
1287531701
912524980
1072419431
1187727045
1571845059
1184110956
1136184594
430092563
1132894799
962...

result:

wrong answer 313th numbers differ - expected: '1326090611', found: '1821468187'