Submission #1051608

#	Time	Username	Problem	Language	Result	Execution time	Memory
1051608		Malix	Jobs (BOI24_jobs)	C++14	11 / 100	128 ms	20304 KiB

Main

#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vii;
typedef pair<int,int> pi;
typedef vector<pi> pii;
typedef tuple<int,int,int> tii;
typedef vector<ll> li;
typedef vector<li> lii;
 
#define REP(i,a,b) for(int i=a;i<b;i++)
#define F first
#define S second
#define PB push_back
#define MP make_pair
#define LSOne(s) ((s)&(-s))
 
ll INF=1e18+10;
int inf=1e9+10;
ll M=1e9+7;

int n;
ll m;
vi p;
vector<ll> profit;
ll ans=0;
vi a;

int main() {   
// ios::sync_with_stdio(0);
// cin.tie(0);
    cin>>n>>m;
    p.resize(n);profit.resize(n);a.resize(n,-1);
    REP(i,0,n){
        ll x;int y;
        cin>>x>>y;
        p[i]=y;
        if(y!=0)a[y-1]=i;
        profit[i]=x;
    }
if(m==1e18){
    ll ans=0;
    vector<vector<ll>> b(n);
    for(int i=n-1;i>=0;i--){
        if(b[i].empty()){
            if(profit[i]>0){
                ans+=profit[i];
                if(p[i]!=0)b[p[i]-1].PB(profit[i]);
            }
            continue;
        }
        ll k=0;
        for(auto u:b[i])k+=u;
        if(profit[i]+k>0){
            ans+=profit[i];
            if(p[i]!=0)b[p[i]-1].PB(profit[i]+k);
        }
        else ans-=k;
    }
    cout<<ans;
    return 0;
}
    priority_queue<pair<ll,ll>> pq;
    ll ans=0;
    vi vis(n,0);vi sm(n,0);
    REP(i,0,n){
        if(vis[i])continue;
        vis[i]=1;
        if(profit[i]>0){
            ans+=profit[i];
            continue;
        }
        else{
            ll y=0,z=0;
            int x=i;
            y+=profit[x];
            x=a[x];
            while(x!=-1&&profit[x]<0){
                vis[x]=1;
                y+=profit[x];
                x=a[x];
            }
            while(x!=-1&&profit[x]>0){
                vis[x]=1;
                z+=profit[x];
                x=a[x];
            }
            if(y+z>0){
                pq.push({y+sm[i],z});
                continue;
            }
            if(x!=-1)sm[x]=y;
            if(x!=-1)profit[x]+=y+z;
        }
    }
    ans+=m;
    while(!pq.empty()){
        ll y=pq.top().F;
        ll z=pq.top().S;
        pq.pop();
        if(ans>=y){
            ans+=y+z;
        }
        else break;
    }
    cout<<ans-m;
    return 0;
}

• Subtask 1: 11 / 11
• Subtask 2: 0 / 14
• Subtask 3: 0 / 15
• Subtask 4: 0 / 29
• Subtask 5: 0 / 31