Submission #1099417

#	Time	Username	Problem	Language	Result	Execution time	Memory
1099417		mihaihvh	Circle Passing (EGOI24_circlepassing)	C++14	20 / 100	2099 ms	1048576 KiB

Main

#include <iostream>
#include <set>
#include <queue>
#include <vector>

using namespace std;

vector<set<int>> v;

long long n, m, q;
int M;

void bf(int k, int l) {
    //int viz[20001]{0};
    vector<int> viz(2*n);
    queue<int> q;
    viz[k] = 1;
    q.push(k);
    while (!q.empty()) {
        for (auto m : v[q.front()]) {
            if (!viz[m]) {
                q.push(m);
                viz[m] = viz[q.front()] + 1;
                if (m == l) {
                    cout << viz[l] - 1 << '\n';
                    return;
                }
            }
        }
        q.pop();
    }
}

int main() {
    cin.tie(NULL);
    cin.sync_with_stdio(false);
    cin >> n >> m >> q;
    vector<set<int>> V(2LL*n);
    v = V;
    for (int i = 0; i < m; ++i) {
        cin >> M;
        v[M].insert(M+n);
        v[M+n].insert(M);
    }
    for (int i = 0; i < 2LL*n; ++i) {
        if (i == 0)
            v[i].insert(2LL*n-1);
        if (i == 2LL*n-1)
            v[i].insert(0);
        if (i < 2*n-1) v[i].insert(i+1);
        if (i > 0) v[i].insert(i-1);
    }

    for (int i = 0; i < q; ++i) {
        int a, b;
        cin >> a >> b;
        bf(a, b);
    }
    return 0;
}

• Subtask 1: 0 / 14
• Subtask 2: 20 / 20
• Subtask 3: 0 / 22
• Subtask 4: 0 / 17
• Subtask 5: 0 / 27