Submission #890132

#	Time	Username	Problem	Language	Result	Execution time	Memory
890132		LeVanThuc	Bitaro’s Party (JOI18_bitaro)	C++14	14 / 100	57 ms	24404 KiB

bitaro

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define fi first
#define se second
#define p(x,y) pair<ll,ll>(x,y)
#define BIT(i,x) ((x>>i)&1)
#define MASK(x) (1<<x)
#define ld long double
#define __builtin_popcount __builtin_popcountll
#define pll pair<ll,ll>
template<class T1,class T2>
bool maximize(T1 &x,T2 y)
{
    if(x<y)
    {
        x=y;
        return 1;
    }
    return 0;
}
template<class T1,class T2>
bool minimize(T1 &x,T2 y)
{
    if(y<x)
    {
        x=y;
        return 1;
    }
    return 0;
}
const ll M=1e9+7;
template <class T1,class T2>
void add(T1 &x,T2 y)
{
    x+=y;
    if(x>=M) x-=M;
}
template <class T1,class T2>
void sub(T1 &x, T2 y)
{
    x-=y;
    if(x<0) x+=M;
}
void online()
{
    std::ios_base::sync_with_stdio(0);
    cin.tie(0);
#ifdef thuc
    freopen("input.inp","r",stdin);
    freopen("output.out","w",stdout);
#else
#endif // thuc
}
const ll N=2e5+10;
ll vs[N],f[N],ban[N],n,m,q,src;
vector<ll> gr[N],rgr[N];
ll solve1(ll u)
{
    if(vs[u]) return f[u];
    vs[u]=1;
    f[u]=-1e9;
    if(u==src) return f[u]=0;
    for(auto v:gr[u])
    {
        maximize(f[u],solve1(v)+1);
        maximize(f[u],solve1(v)+1);
    }
    return f[u];
}
ll tr(ll u,ll y)
{
    src=u;
    for(int i=1;i<=n;i++)
    {
        ban[i]=0;
        vs[i]=0;
    }
    for(int i=1;i<=y;i++)
    {
        ll x;
        cin>>x;
        ban[x]=1;
    }
    ll ans=-1;
    for(int i=1;i<=n;i++)
    {
        if(!ban[i])maximize(ans,solve1(i));
    }
    return ans;
}
bool sub2()
{
    for(int i=1;i<=m;i++)
    {
        ll u,v;
        cin>>u>>v;
        if(u>v) swap(u,v);
        gr[u].push_back(v);
    }
    ll t,y;
    cin>>t>>y;
    cout<<tr(t,y);
    return 0;
}
int main()
{
    online();
    cin>>n>>m>>q;
    if(q==1) return sub2();
}

• Subtask 1: 7 / 7
• Subtask 2: 7 / 7
• Subtask 3: 0 / 86