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Submission #909547

# Submission time Handle Problem Language Result Execution time Memory
909547 2024-01-17T09:02:47 Z ttamx Rigged Roads (NOI19_riggedroads) C++14
58 / 100
 714 ms 262144 KB 
#include<bits/stdc++.h>

using namespace std;

const int N=3e5+5;

int n,m;
pair<int,int> edge[N];
vector<pair<int,int>> adj[N];
int pa[N],pid[N],lv[N];
int fa[N];
int ans[N];
bool ok[N];

int fp(int u){
    return fa[u]=u==fa[u]?u:fp(fa[u]);
}

void dfs(int u,int p=0){
    lv[u]=lv[p]+1;
    for(auto [v,i]:adj[u])if(v!=p){
        pa[v]=u;
        pid[v]=i;
        dfs(v,u);
    }
}

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> n >> m;
    for(int i=1;i<=m;i++){
        auto &[u,v]=edge[i];
        cin >> u >> v;
    }
    for(int i=1;i<=n;i++){
        int x;
        cin >> x;
        auto [u,v]=edge[x];
        adj[u].emplace_back(v,x);
        adj[v].emplace_back(u,x);
        ok[x]=true;
    }
    dfs(1);
    for(int i=1;i<=n;i++)fa[i]=i;
    int cnt=1;
    for(int i=1;i<=m;i++){
        if(ans[i])continue;
        auto [u,v]=edge[i];
        u=fp(u),v=fp(v);
        vector<int> res;
        while(u!=v){
            if(lv[u]<lv[v])swap(u,v);
            res.emplace_back(pid[u]);
            u=fa[u]=fp(pa[u]);
        }
        sort(res.begin(),res.end());
        for(auto j:res)ans[j]=cnt++;
        if(!ok[i])ans[i]=cnt++;
    }
    for(int i=1;i<=m;i++)cout << ans[i] << " ";
}

Compilation message

riggedroads.cpp: In function 'void dfs(int, int)':
riggedroads.cpp:21:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   21 |     for(auto [v,i]:adj[u])if(v!=p){
      |              ^
riggedroads.cpp: In function 'int main()':
riggedroads.cpp:32:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   32 |         auto &[u,v]=edge[i];
      |               ^
riggedroads.cpp:38:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   38 |         auto [u,v]=edge[x];
      |              ^
riggedroads.cpp:48:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   48 |         auto [u,v]=edge[i];
      |              ^

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 12632 KB Output is correct
2 Correct 3 ms 12636 KB Output is correct
3 Correct 3 ms 12636 KB Output is correct

Subtask #2
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 12632 KB Output is correct
2 Correct 3 ms 12636 KB Output is correct
3 Correct 3 ms 12636 KB Output is correct
4 Correct 4 ms 12636 KB Output is correct
5 Correct 4 ms 12784 KB Output is correct
6 Correct 4 ms 12636 KB Output is correct
7 Correct 4 ms 12636 KB Output is correct
8 Correct 3 ms 12780 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 19404 KB Output is correct
2 Correct 62 ms 22748 KB Output is correct
3 Correct 60 ms 19400 KB Output is correct
4 Correct 97 ms 32240 KB Output is correct
5 Correct 103 ms 33204 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 26748 KB Output is correct
2 Correct 37 ms 18768 KB Output is correct
3 Correct 19 ms 15708 KB Output is correct
4 Correct 42 ms 23084 KB Output is correct
5 Correct 18 ms 17036 KB Output is correct

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 714 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #6
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 116 ms 30776 KB Output is correct
2 Correct 68 ms 25496 KB Output is correct
3 Correct 234 ms 39660 KB Output is correct
4 Correct 199 ms 37460 KB Output is correct
5 Correct 21 ms 14680 KB Output is correct

Subtask #7
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 12632 KB Output is correct
2 Correct 3 ms 12636 KB Output is correct
3 Correct 3 ms 12636 KB Output is correct
4 Correct 4 ms 12636 KB Output is correct
5 Correct 4 ms 12784 KB Output is correct
6 Correct 4 ms 12636 KB Output is correct
7 Correct 4 ms 12636 KB Output is correct
8 Correct 3 ms 12780 KB Output is correct
9 Correct 41 ms 19404 KB Output is correct
10 Correct 62 ms 22748 KB Output is correct
11 Correct 60 ms 19400 KB Output is correct
12 Correct 97 ms 32240 KB Output is correct
13 Correct 103 ms 33204 KB Output is correct
14 Correct 56 ms 26748 KB Output is correct
15 Correct 37 ms 18768 KB Output is correct
16 Correct 19 ms 15708 KB Output is correct
17 Correct 42 ms 23084 KB Output is correct
18 Correct 18 ms 17036 KB Output is correct
19 Runtime error 714 ms 262144 KB Execution killed with signal 9
20 Halted 0 ms 0 KB -