Submission #1107500

#	Time	Username	Problem	Language	Result	Execution time	Memory
1107500		koukirocks	Network (BOI15_net)	C++17	0 / 100	538 ms	262144 KiB

net

#include <bits/stdc++.h>
#define speed ios_base::sync_with_stdio(0); cin.tie(0)
#define all(x) (x).begin(),(x).end()
#define F first
#define S second
//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx,avx2")
//#pragma GCC target("popcnt")
 
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef double db;
typedef long double ldb;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
 
const ll MAX=2e5+10,P=1e9+7;
const ll INF=0x3f3f3f3f,oo=0x3f3f3f3f3f3f3f3f;
const ldb eps=1e-6;
const ldb PI=acos(-1.0);
const int dir[4][2]={{0,1},{0,-1},{1,0},{-1,0}};
template<typename T>
using vvector = vector<vector<T>>;

pii dfs(int v,int p,vvector<int> &G) {
    ;
}

int main() {
    speed;
    int n;
    cin>>n;
    vvector<int> G(n+1);
    for (int i=0;i<n-1;i++) {
        int a,b;
        cin>>a>>b;
        G[a].push_back(b);
        G[b].push_back(a);
    }
    int rot=0;
    for (int i=1;i<=n;i++) {
        if (G[i].size()>1) {
            rot=i;
            break;
        }
    }
    pii lv = dfs(rot,0,G);
    return 0;
}

Compilation message (stderr)

net.cpp: In function 'pii dfs(int, int, vvector<int>&)':
net.cpp:28:1: warning: no return statement in function returning non-void [-Wreturn-type]
   28 | }
      | ^
net.cpp: In function 'int main()':
net.cpp:48:9: warning: variable 'lv' set but not used [-Wunused-but-set-variable]
   48 |     pii lv = dfs(rot,0,G);
      |         ^~

• Subtask 1: 0 / 18
• Subtask 2: 0 / 45
• Subtask 3: 0 / 37