oj.uz

Submission #771522

# Submission time Handle Problem Language Result Execution time Memory
771522 2023-07-03T05:49:36 Z ttamx One-Way Streets (CEOI17_oneway) C++14
100 / 100
 49 ms 12984 KB 
#include<bits/stdc++.h>
#pragma GCC optimize("O3,unroll-loops")

using namespace std;

const int N=1e5+5;

int n,m,p; 
int val[N],val2[N];
char ans[N];
vector<pair<int,int>> adj[N];
bool vis[N],used[N];

void dfs(int u){
    vis[u]=true;
    for(auto [v,i]:adj[u]){
        if(used[i>>1])continue;
        used[i>>1]=true;
        if(!vis[v]){
            dfs(v);
            ans[i>>1]=(val2[v]>0||!val[v])?'B':((val[v]>0)^(i&1))?'L':'R';
            val[u]+=val[v];
            val2[u]+=val2[v];
        }else{
            ans[i>>1]='B';
            val2[u]++;
            val2[v]--;
        }
    }
}

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> n >> m;
    for(int i=1;i<=m;i++){
        int u,v;
        cin >> u >> v;
        adj[u].emplace_back(v,i<<1);
        adj[v].emplace_back(u,i<<1|1);
    }
    cin >> p;
    for(int i=1;i<=p;i++){
        int u,v;
        cin >> u >> v;
        val[u]++;
        val[v]--;
    }
    for(int i=1;i<=n;i++)if(!vis[i])dfs(i);
    for(int i=1;i<=m;i++)cout << ans[i];
}

Compilation message

oneway.cpp: In function 'void dfs(int)':
oneway.cpp:16:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   16 |     for(auto [v,i]:adj[u]){
      |              ^

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 2 ms 2644 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 1 ms 2772 KB Output is correct
6 Correct 2 ms 2644 KB Output is correct
7 Correct 2 ms 2772 KB Output is correct
8 Correct 2 ms 2644 KB Output is correct
9 Correct 1 ms 2644 KB Output is correct
10 Correct 2 ms 2644 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 2 ms 2644 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 1 ms 2772 KB Output is correct
6 Correct 2 ms 2644 KB Output is correct
7 Correct 2 ms 2772 KB Output is correct
8 Correct 2 ms 2644 KB Output is correct
9 Correct 1 ms 2644 KB Output is correct
10 Correct 2 ms 2644 KB Output is correct
11 Correct 25 ms 7296 KB Output is correct
12 Correct 27 ms 8212 KB Output is correct
13 Correct 31 ms 9228 KB Output is correct
14 Correct 34 ms 9872 KB Output is correct
15 Correct 33 ms 9832 KB Output is correct
16 Correct 28 ms 7508 KB Output is correct
17 Correct 27 ms 9384 KB Output is correct
18 Correct 27 ms 7476 KB Output is correct
19 Correct 38 ms 10680 KB Output is correct
20 Correct 26 ms 7612 KB Output is correct
21 Correct 26 ms 7372 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 2 ms 2644 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 1 ms 2772 KB Output is correct
6 Correct 2 ms 2644 KB Output is correct
7 Correct 2 ms 2772 KB Output is correct
8 Correct 2 ms 2644 KB Output is correct
9 Correct 1 ms 2644 KB Output is correct
10 Correct 2 ms 2644 KB Output is correct
11 Correct 25 ms 7296 KB Output is correct
12 Correct 27 ms 8212 KB Output is correct
13 Correct 31 ms 9228 KB Output is correct
14 Correct 34 ms 9872 KB Output is correct
15 Correct 33 ms 9832 KB Output is correct
16 Correct 28 ms 7508 KB Output is correct
17 Correct 27 ms 9384 KB Output is correct
18 Correct 27 ms 7476 KB Output is correct
19 Correct 38 ms 10680 KB Output is correct
20 Correct 26 ms 7612 KB Output is correct
21 Correct 26 ms 7372 KB Output is correct
22 Correct 40 ms 9420 KB Output is correct
23 Correct 37 ms 7436 KB Output is correct
24 Correct 40 ms 7572 KB Output is correct
25 Correct 49 ms 12984 KB Output is correct
26 Correct 40 ms 8952 KB Output is correct
27 Correct 39 ms 7632 KB Output is correct
28 Correct 24 ms 5204 KB Output is correct
29 Correct 38 ms 7156 KB Output is correct
30 Correct 43 ms 7292 KB Output is correct
31 Correct 37 ms 7672 KB Output is correct
32 Correct 37 ms 9912 KB Output is correct