Submission #1053693

#	Time	Username	Problem	Language	Result	Execution time	Memory
1053693		kukuk	Senior Postmen (BOI14_postmen)	C++14	0 / 100	1097 ms	14236 KiB

postmen

#include <bits/stdc++.h>
using namespace std;
#define all(x) (x).begin(), (x).end()
typedef long long ll;
typedef unsigned long long int ull;
const ll md = 1e9+7;
const int ukr = 5e5+10;
void File_Work(){
	freopen("test.in","r",stdin);
	freopen("test.out","w",stdout);
}
int n, m, a, b, c, d, id;
struct babi{
    ll x, y, id;
};
struct babis{
    ll x, y;
};
ll gcd(ll a, ll b) {
   if (b == 0) return a;
   return gcd(b, a % b);
}
ll pgkt(ll rnx, ll rny){
    if(rny == 0) return 1;
    ll nwrn = pgkt(rnx, rny/2);
    if(rny%2){
        return (((nwrn*nwrn)%md)*rnx)%md;
    }else{
        return (nwrn*nwrn)%md;
    }
}
vector<vector<pair<int,int>>> adj(ukr);
vector<int> v;
int vis[ukr];
int eve[ukr];
int ans[ukr];
string s;
bool dfs(ll rn, ll pp, ll sz){
    //cout << rn << endl;
    vis[rn] = 1;
    ans[sz] = rn;
    for(auto i : adj[rn]){
        if(eve[i.second]) continue;
        eve[i.second] = 1;
        if(!vis[i.first] && dfs(i.first, pp, sz+1)){
            vis[i.first] = 0;
            return 1;
        }else if(i.first == pp){
            for(int j = 0; j < sz; j++) {
                cout << ans[j] << " ";
            }
            cout << ans[sz] << "\n";
            return true;
        }
        eve[i.second] = 0;
    }
    vis[rn] = 0;
    return 0;
}
void solve(){
    cin >> n >> m;
    for(int i = 0; i < m; i++){
        cin >> a >> b;
        adj[a].push_back({b, i});
        adj[b].push_back({a, i});
    }
    for(int i = 1; i <= n; i++){
        while(1){
            v.clear();
            if(!dfs(i, i, 0)){
                vis[i] = 0;
                break;
            }
        }
    }
}
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
	int t =1;
    //cin >> t;
    for(int i = 1; i <= t; i++){
        //cout << "Case " << i << ": ";
        solve();
    }
}

Compilation message (stderr)

postmen.cpp: In function 'void File_Work()':
postmen.cpp:9:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |  freopen("test.in","r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
postmen.cpp:10:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |  freopen("test.out","w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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