Submission #399015

#	Time	Username	Problem	Language	Result	Execution time	Memory
399015		lyc	Senior Postmen (BOI14_postmen)	C++14	0 / 100	8 ms	12060 KiB

postmen

#include <bits/stdc++.h>
using namespace std;

#define TRACE(x) cerr << #x << " :: " << x << endl
#define _ << " " <<
#define SZ(x) (int)(x).size()
#define ALL(x) (x).begin(),(x).end()
#define FOR(i,a,b) for(int i=(a);i<=(b);++i)
#define RFOR(i,a,b) for (int i=(a);i>=(b);--i)
typedef pair<int,int> ii;

const int mxN = 5e5+5;
const int mxM = 5e5+5;

int N, M;
vector<ii> al[mxN];
bool used[mxM];

vector<int> cyc;
void dfs(int u, int r) {
    cyc.push_back(u);
    for (ii& e : al[u]) if (!used[e.second]) {
        used[e.second] = 1;
        if (e.first != r) dfs(e.first, r);
        return;
    }
}

int main() {
    ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    
    cin >> N >> M;
    FOR(i,1,M){
        int U, V; cin >> U >> V;
        al[U].push_back(ii(V,i));
        al[V].push_back(ii(U,i));
    }

    FOR(i,1,N){
        cyc.clear();
        dfs(i,i);
        if (SZ(cyc) > 1) {
            for (int& v : cyc) {
                cout << v << ' ';
            }
            cout << '\n';
        }
    }
}

• Subtask 1: 0 / 38
• Subtask 2: 0 / 17
• Subtask 3: 0 / 45