oj.uz

Submission #771500

# Submission time Handle Problem Language Result Execution time Memory
771500 2023-07-03T05:27:37 Z ttamx One-Way Streets (CEOI17_oneway) C++14
100 / 100
 45 ms 11964 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,int p){
    vis[u]=true;
    for(auto [v,i]:adj[u]){
        if(used[abs(i)])continue;
        used[abs(i)]=true;
        if(!vis[v]){
            dfs(v,i);
            if(val2[v]>0||val[v]==0)ans[abs(i)]='B';
            else ans[abs(i)]=((val[v]<0)^(i>0))?'L':'R';
            val[u]+=val[v];
            val2[u]+=val2[v];
        }else{
            ans[abs(i)]='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);
        adj[v].emplace_back(u,-i);
    }
    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,0);
    for(int i=1;i<=m;i++)cout << ans[i];
}

Compilation message

oneway.cpp: In function 'void dfs(int, 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 1 ms 2644 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 2 ms 2680 KB Output is correct
6 Correct 2 ms 2644 KB Output is correct
7 Correct 2 ms 2644 KB Output is correct
8 Correct 1 ms 2644 KB Output is correct
9 Correct 1 ms 2644 KB Output is correct
10 Correct 2 ms 2720 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 1 ms 2644 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 2 ms 2680 KB Output is correct
6 Correct 2 ms 2644 KB Output is correct
7 Correct 2 ms 2644 KB Output is correct
8 Correct 1 ms 2644 KB Output is correct
9 Correct 1 ms 2644 KB Output is correct
10 Correct 2 ms 2720 KB Output is correct
11 Correct 24 ms 7028 KB Output is correct
12 Correct 28 ms 7824 KB Output is correct
13 Correct 33 ms 8780 KB Output is correct
14 Correct 45 ms 9420 KB Output is correct
15 Correct 35 ms 9420 KB Output is correct
16 Correct 27 ms 7488 KB Output is correct
17 Correct 26 ms 9012 KB Output is correct
18 Correct 35 ms 7448 KB Output is correct
19 Correct 27 ms 10156 KB Output is correct
20 Correct 26 ms 7368 KB Output is correct
21 Correct 28 ms 7168 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 1 ms 2644 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 2 ms 2680 KB Output is correct
6 Correct 2 ms 2644 KB Output is correct
7 Correct 2 ms 2644 KB Output is correct
8 Correct 1 ms 2644 KB Output is correct
9 Correct 1 ms 2644 KB Output is correct
10 Correct 2 ms 2720 KB Output is correct
11 Correct 24 ms 7028 KB Output is correct
12 Correct 28 ms 7824 KB Output is correct
13 Correct 33 ms 8780 KB Output is correct
14 Correct 45 ms 9420 KB Output is correct
15 Correct 35 ms 9420 KB Output is correct
16 Correct 27 ms 7488 KB Output is correct
17 Correct 26 ms 9012 KB Output is correct
18 Correct 35 ms 7448 KB Output is correct
19 Correct 27 ms 10156 KB Output is correct
20 Correct 26 ms 7368 KB Output is correct
21 Correct 28 ms 7168 KB Output is correct
22 Correct 42 ms 9020 KB Output is correct
23 Correct 37 ms 7432 KB Output is correct
24 Correct 39 ms 7500 KB Output is correct
25 Correct 41 ms 11964 KB Output is correct
26 Correct 39 ms 8692 KB Output is correct
27 Correct 37 ms 7548 KB Output is correct
28 Correct 22 ms 5072 KB Output is correct
29 Correct 45 ms 6960 KB Output is correct
30 Correct 39 ms 7116 KB Output is correct
31 Correct 37 ms 7404 KB Output is correct
32 Correct 36 ms 9300 KB Output is correct