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ID提交记录ID题目HackerOwner结果提交时间测评时间
#1513#881587#9904. 最小生成树TulipeNoireSapnapTTSuccess!2025-02-04 17:09:452025-02-04 17:09:45

詳細信息

Extra Test:

Wrong Answer
time: 56ms
memory: 7480kb

input:

200000
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 1...

output:

19158529139

result:

wrong answer 1st numbers differ - expected: '17352503335', found: '19158529139'

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
#881587#9904. 最小生成树SapnapTT97 62ms7812kbC++20709b2025-02-04 16:48:082025-02-04 17:21:05

answer

#include<bits/stdc++.h>
using namespace std;
const int N=4e5+5;
int n,t,T,f[N];
struct S{
	int v,d;
	friend bool operator<(S x,S y){
		return x.v==y.v?x.d>y.d:x.v<y.v;
	}
}a[N];
inline int F(int x){
	return (f[x]==x?x:f[x]=F(f[x]));
}
long long A;
int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	cin>>n;
	for(int i=3;i<=2*n-1;cin>>a[i].v,a[i].d=i,++i);
	sort(a+3,a+2*n);
	for(int i=1;i<=n;f[i]=i,++i);
	for(int i=3,G;i<=2*n-1;++i){
		for(int j=max(1,a[i].d-n),x,y,G=0;j<a[i].d-j;++j){
			x=F(j),y=F(a[i].d-j);
			if(x!=y) f[x]=y,A+=a[i].v,t++;
			else G++;
			T++;
			if(t==n-1||(T>300000&&G>20)) break;
		}
		if(t==n-1) break;
	}
	cout<<A;
	return 0;
}