oj.uz

답안 #447418

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
447418 2021-07-26T09:33:17 Z fuad27 One-Way Streets (CEOI17_oneway) C++14
30 / 100
 12 ms 460 KB 
#include <bits/stdc++.h>

using namespace std;
#define int long long
vector < int > adj[1002];
pair < int, int > road[1002];
pair < int, int > haveTo[1002];
int subOf[1002];
bool visited[1002];
bool poss = false;
void dfs(int x, int s, int e) {
    visited[x] = true;
    if (x == e) {
        poss = true;
        return;
    }
    subOf[x] = 1;
    for (auto u: adj[x]) {
        if (!visited[u] && (x != s || u != e)) {
            dfs(u, s, e);
        }
        if (poss) return;
    }
}
int32_t main() {
    int n, m;
    cin >> n >> m;
    for (int i = 1; i <= m; i++) {
        int s, e;
        cin >> s >> e;
        adj[s].push_back(e);
        adj[e].push_back(s);
        road[i] = {
            s,
            e
        };
    }
    int p;
    cin >> p;
    for (int i = 1; i <= p; i++) {
        int s, e;
        cin >> s >> e;
        haveTo[i] = {
            s,
            e
        };
    }
    for (int i = 1; i <= m; i++) {
        int s = road[i].first, e = road[i].second;
        bool toL = true, toR = true;
        fill(visited, visited + 1002, false);
        fill(subOf, subOf + 1002, 0);
        poss = false;
        int cnt = 0;
        for (auto u: adj[s]) {
            if (u == e) cnt++;
        }
        if (cnt > 1) {
            cout << "B";
            continue;
        }
        dfs(s, s, e);
        if (poss) {
            cout << "B";
        } else {
            for (int j = 1; j <= p; j++) {
                if (subOf[haveTo[j].first] == 1 && subOf[haveTo[j].second] == 0) {
                    toL = false;
                }
                if (subOf[haveTo[j].first] == 0 && subOf[haveTo[j].second] == 1) {
                    toR = false;
                }
            }
            if (toL && toR) cout << "B";
            else if (toL) cout << "L";
            else cout << "R";
        }
    }
}

Subtask #1
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 8 ms 332 KB Output is correct
4 Correct 10 ms 388 KB Output is correct
5 Correct 9 ms 332 KB Output is correct
6 Correct 2 ms 332 KB Output is correct
7 Correct 11 ms 332 KB Output is correct
8 Correct 12 ms 332 KB Output is correct
9 Correct 8 ms 332 KB Output is correct
10 Correct 4 ms 332 KB Output is correct

Subtask #2
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 8 ms 332 KB Output is correct
4 Correct 10 ms 388 KB Output is correct
5 Correct 9 ms 332 KB Output is correct
6 Correct 2 ms 332 KB Output is correct
7 Correct 11 ms 332 KB Output is correct
8 Correct 12 ms 332 KB Output is correct
9 Correct 8 ms 332 KB Output is correct
10 Correct 4 ms 332 KB Output is correct
11 Runtime error 1 ms 460 KB Execution killed with signal 11
12 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 8 ms 332 KB Output is correct
4 Correct 10 ms 388 KB Output is correct
5 Correct 9 ms 332 KB Output is correct
6 Correct 2 ms 332 KB Output is correct
7 Correct 11 ms 332 KB Output is correct
8 Correct 12 ms 332 KB Output is correct
9 Correct 8 ms 332 KB Output is correct
10 Correct 4 ms 332 KB Output is correct
11 Runtime error 1 ms 460 KB Execution killed with signal 11
12 Halted 0 ms 0 KB -