QOJ.ac
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 |
---|---|---|---|---|---|---|---|---|---|
#791410 | #6742. Leaves | HJR# | WA | 2ms | 3820kb | C++17 | 4.3kb | 2024-11-28 18:28:40 | 2024-11-28 18:28:40 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define endl "\n"
#define debug(x) cout<<#x<<": "<<x<<endl
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
using ll=long long;
using ull=unsigned long long;
void solve(){
int n,m;
cin >> n >> m;
vector<vector<int>>e(n+1);
vector<int>fa(n+1);
vector<int>son_vis(n+1);
vector<int>label(n+1);
vector<int>dep(n+1);
vector<array<int,2>>cmp;
for(int i = 1;i <= n;i++)
{
int opt;
cin>>opt;
if(opt == 1)
{
int a,b;
cin>>a>>b;
e[i].push_back(a);
e[i].push_back(b);
son_vis[a] = 0,son_vis[b] = 1;
fa[a] = fa[b] = i;
dep[a] = dep[b] = dep[i] + 1;
}
else
{
cin >> label[i];
cmp.push_back({label[i],i});
}
}
sort(cmp.begin(),cmp.end());
vector<int>ord;
auto dfs = [&](auto &&self,int u) ->void
{
for(auto v:e[u])
self(self,v);
if(e[u].empty())
ord.push_back(u);
};
auto LCA = [&](int x,int y)
{
int len = 1;
while(fa[x] != fa[y])
{
if(dep[x] > dep[y])
x = fa[x];
else if(dep[x] < dep[y]){
len += (son_vis[x] != son_vis[y]);
y = fa[y];
}
else{
len += (son_vis[x] != son_vis[y]);
x = fa[x];
y = fa[y];
}
}
return len;
};
auto SWAP = [&](int y)
{
int f = fa[y];
swap(e[f][0],e[f][1]);
swap(son_vis[e[f][0]],son_vis[e[f][1]]);
};
auto update = [&](int x,int y)
{
while(fa[x] != fa[y])
{
if(dep[x] > dep[y])
x = fa[x];
else if(dep[x] < dep[y]){
if(son_vis[y] != son_vis[x])
SWAP(y);
y = fa[y];
}
else{
if(son_vis[x] != son_vis[y])
SWAP(y);
x = fa[x];
y = fa[y];
}
}
SWAP(y);
};
auto check = [&](int i)
{
ord.clear();
dfs(dfs,i);
sort(ord.begin()+1,ord.end(),[&](const int &x,const int &y){
return label[x] < label[y];
});
for(int j = 1;j<ord.size() && label[ord[j]] < label[ord[0]];j++)
{
int lca = LCA(ord[0],ord[j]);
//cout<<ord[0] <<" "<<ord[j]<<" "<<lca<<endl;
if(m >= lca)
{
// cout<<ord[0]<<" "<<ord[j]<<endl;
update(ord[0],ord[j]);
m -= lca;
break;
}
}
};
for(int i = 1; e[i].size() ;i = e[i][1])
{
check(i);
for(int j = ord[0];j != i;j = fa[j])
{
if(e[j].size())
{
check(e[j][1]);
}
}
}
ord.clear();
dfs(dfs,1);
auto chmin = [&](vector<int> &x,vector<int> &y)
{
for(int i = 0;i < x.size();i++)
if(x[i] != label[y[i]])
{
if(x[i] > label[y[i]])
{
for(int j = 0;j < x.size();j++)
{
x[j] = label[y[j]];
}
}
return;
}
};
if(m % 2)
{
vector<int>ans(ord.size(),1e9);
for(int i = 1;i <= n;i++)
{
if(e[i].size())
{
ord.clear();
SWAP(e[i][1]);
dfs(dfs,1);
chmin(ans,ord);
SWAP(e[i][1]);
}
}
for(auto i:ans)
cout<<i<<" ";
cout<<endl;
return;
}
for(auto i:ord)
cout<<label[i]<<" ";
cout<<endl;
}
signed main(){
ios::sync_with_stdio(0);
cout.tie(0);
cin.tie(0);
int t = 1;
//cin>>t;
while(t--){
solve();
}
}
/*
贡献法
正难则反
数小状压
关系连边
拆位
广义单调性
最长转最短
*/
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 3616kb
input:
3 0 1 2 3 2 1 2 2
output:
1 2
result:
ok 2 number(s): "1 2"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3620kb
input:
7 1 1 2 3 1 4 5 1 6 7 2 4 2 2 2 3 2 1
output:
2 4 3 1
result:
ok 4 number(s): "2 4 3 1"
Test #3:
score: 0
Accepted
time: 0ms
memory: 3668kb
input:
7 2 1 2 3 1 4 5 1 6 7 2 4 2 2 2 3 2 1
output:
1 3 4 2
result:
ok 4 number(s): "1 3 4 2"
Test #4:
score: 0
Accepted
time: 0ms
memory: 3668kb
input:
1 0 2 1000000000
output:
1000000000
result:
ok 1 number(s): "1000000000"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3784kb
input:
3 1 1 2 3 2 1 2 2
output:
2 1
result:
ok 2 number(s): "2 1"
Test #6:
score: 0
Accepted
time: 0ms
memory: 3820kb
input:
7 2 1 2 3 1 4 5 1 6 7 2 1 2 2 2 3 2 4
output:
1 2 3 4
result:
ok 4 number(s): "1 2 3 4"
Test #7:
score: -100
Wrong Answer
time: 2ms
memory: 3684kb
input:
999 480 1 3 2 1 4 5 1 6 7 1 9 8 1 10 11 1 13 12 1 14 15 1 16 17 1 19 18 1 21 20 1 23 22 1 25 24 1 27 26 1 28 29 1 30 31 1 33 32 1 35 34 1 37 36 1 38 39 1 41 40 1 42 43 1 45 44 1 46 47 1 48 49 1 51 50 1 52 53 1 55 54 1 56 57 1 58 59 1 61 60 1 62 63 1 64 65 1 67 66 1 69 68 1 71 70 1 73 72 1 74 75 1 76...
output:
34826804 763875883 763875883 763875883 763875883 763875883 763875883 763875883 763875883 763875883 763875883 248820103 763875883 763875883 763875883 763875883 763875883 763875883 763875883 763875883 763875883 763875883 763875883 763875883 763875883 763875883 763875883 763875883 763875883 763875883 7...
result:
wrong answer 9th numbers differ - expected: '248820103', found: '763875883'