oj.uz

Submission #116085

# Submission time Handle Problem Language Result Execution time Memory
116085 2019-06-10T12:38:23 Z Meloric One-Way Streets (CEOI17_oneway) C++14
100 / 100
 108 ms 13440 KB 
#include <bits/stdc++.h>
#define pb push_back
#define X first
#define Y second
#define pii pair<int, int>

using namespace std;
vector<vector<int>> g;
struct edge{
    int u, v;
    char dir;
};
vector<edge> ed;
vector<int> tin, low, val, vis;
int n, m, counter;

void dfs(int v, int p){
    tin[v] = low[v] = counter;
    counter++;
    vis[v] = 1;
    for(auto ch : g[v]){
        if(ch == p)continue;
        int nx = (v==ed[ch].u) ? ed[ch].v : ed[ch].u;
        if(vis[nx]){
            low[v] = min(low[v], tin[nx]);
            continue;
        }
        dfs(nx, ch);
        low[v] = min(low[v], low[nx]);
        pii cor;
        if(tin[v] < low[nx]){
            if(val[nx] == 0)continue;
            if(val[nx] < 0){
                cor = {v, nx};
            }else{
                cor = {nx, v};
            }
            if(ed[ch].u == cor.X)ed[ch].dir = 'R';
            else ed[ch].dir = 'L';
        }
        val[v]+=val[nx];
    }
}
int main(){
    ios_base::sync_with_stdio(false);
	cin.tie(NULL);
    cin >> n >> m;
    counter = 0;
    g.assign(n, vector<int>());
    tin.assign(n, 0);
    low.assign(n, 0);
    val.assign(n, 0);
    vis.assign(n, 0);
    for(int i = 0; i< m; i++){
        int c, d; cin >> c >> d; c--; d--;
        ed.pb({c, d, 'B'});
        g[c].pb(i); g[d].pb(i);
    }
    int q; cin >> q;
    while(q--){
        int c, d; cin >> c >> d; c--; d--;
        val[c]++; val[d]--;
    }
    for(int i = 0;i<n; i++){
        if(!vis[i])dfs(i, -1);
    }
    for(auto i : ed){
        cout << i.dir;
    }
    return 0;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 512 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 512 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 52 ms 5036 KB Output is correct
12 Correct 53 ms 6444 KB Output is correct
13 Correct 63 ms 7980 KB Output is correct
14 Correct 98 ms 9644 KB Output is correct
15 Correct 102 ms 10028 KB Output is correct
16 Correct 84 ms 8748 KB Output is correct
17 Correct 81 ms 10320 KB Output is correct
18 Correct 95 ms 8736 KB Output is correct
19 Correct 77 ms 11564 KB Output is correct
20 Correct 60 ms 6828 KB Output is correct
21 Correct 52 ms 6572 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 512 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 52 ms 5036 KB Output is correct
12 Correct 53 ms 6444 KB Output is correct
13 Correct 63 ms 7980 KB Output is correct
14 Correct 98 ms 9644 KB Output is correct
15 Correct 102 ms 10028 KB Output is correct
16 Correct 84 ms 8748 KB Output is correct
17 Correct 81 ms 10320 KB Output is correct
18 Correct 95 ms 8736 KB Output is correct
19 Correct 77 ms 11564 KB Output is correct
20 Correct 60 ms 6828 KB Output is correct
21 Correct 52 ms 6572 KB Output is correct
22 Correct 97 ms 10412 KB Output is correct
23 Correct 92 ms 8748 KB Output is correct
24 Correct 108 ms 8760 KB Output is correct
25 Correct 101 ms 13440 KB Output is correct
26 Correct 108 ms 9980 KB Output is correct
27 Correct 91 ms 8876 KB Output is correct
28 Correct 36 ms 2744 KB Output is correct
29 Correct 78 ms 6572 KB Output is correct
30 Correct 74 ms 6524 KB Output is correct
31 Correct 80 ms 6828 KB Output is correct
32 Correct 79 ms 9256 KB Output is correct