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QOJ
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 |
---|---|---|---|---|---|---|---|---|---|
#316348 | #8136. Rebellious Edge | Liberty12619 | WA | 43ms | 3668kb | C++20 | 1.9kb | 2024-01-27 19:59:26 | 2024-01-27 19:59:28 |
Judging History
answer
#include <bits/stdc++.h>
#define x first
#define y second
#define int long long
using namespace std;
typedef pair<int,int> PII;
typedef unsigned long long ULL;
const int N = 5e5+10;
const int INF = 1e15;
vector<PII>g[N],h[N];
void solve()
{
int n,m;
cin>>n>>m;
for(int i=1;i<=n;i++)
{
g[i].clear();
h[i].clear();
}
array<int,3> tmp;
for(int i=1;i<=m;i++)
{
int u,v,w;
cin>>u>>v>>w;
if(u>v) tmp={u,v,w};
g[v].push_back({w,u});
}
for(int i=1;i<=n;i++) sort(g[i].begin(),g[i].end());
int ans=0;
for(int i=2;i<=n;i++)
{
int u = g[i][0].y,w=g[i][0].x;
h[u].push_back({i,w});
ans+=w;
}
vector<bool>st(n+1,0);
queue<int>q;
q.push(1);
while(q.size())
{
int t = q.front();
st[t]=true;
q.pop();
for(auto [x,y] : h[t])
{
if(st[x]) continue;
q.push(x);
}
}
bool ok = true;
for(int i=1;i<=n;i++)
if(!st[i]) ok=false;
if(ok)
{
cout<<ans<<"\n";
return;
}
ans=0;
for(int i=1;i<=n;i++) st[i]=false;
int u = tmp[0],v=tmp[1],res=INF;
while(u!=1)
{
st[u]=true;
for(auto [x,y]: g[u])
{
ans+=x;
if(st[y]) ok=true;
u=y;
break;
}
if(ok) break;
}
if(ok)
{
for(int i=1;i<=n;i++)
if(st[i]&&g[i].size()>1)
res=min(res,ans-g[i][0].x+g[i][1].x);
ans=res;
}
for(int i=2;i<=n;i++)
if(!st[i])
ans+=g[i][0].x;
cout<<ans<<"\n";
}
signed main()
{
int T=1;
cin.tie(0)->sync_with_stdio(false);
cin>>T;
//init();
while(T--)
{
solve();
}
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 2ms
memory: 3652kb
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: -100
Wrong Answer
time: 43ms
memory: 3668kb
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:
wrong answer 54th numbers differ - expected: '1143971131', found: '1090291883'