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Submission #897810

# Submission time Handle Problem Language Result Execution time Memory
897810 2024-01-03T17:54:52 Z Malix Dreaming (IOI13_dreaming) C++14
18 / 100
 58 ms 16852 KB 
#include "dreaming.h"
#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> pi;
 
#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

vi leaf,leafVal;

int findLeaf(int a,vector<vector<pi>> &c,vi &p,vi &toLeaf,int &i,vi &up){
    if(toLeaf[a]!=-1)return toLeaf[a];
    up[a]=i;
    if(c[a].size()==0){
        toLeaf[a]=0;
        return 0;
    }
    if(c[a].size()<2&&p[a]!=a){
        toLeaf[a]=0;
        return 0;
    }
    for(auto u:c[a]){
        if(u.F==p[a])continue;
        p[u.F]=a;
        toLeaf[a]=max(toLeaf[a],findLeaf(u.F,c,p,toLeaf,i,up)+u.S);
        if(toLeaf[a]==toLeaf[u.F]+u.S){
            leaf[a]=u.F;
            leafVal[a]=u.S;
        }
    } 
    return toLeaf[a];
}

int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
    vi p(N,-1);
    vi toLeaf(N,-1);
    vi maxLength(N,0);
    vi up(N);
    vi parents;
    leaf.resize(N,-1);
    leafVal.resize(N,-1);

    vector<vector<pi>> c(N);
    REP(i,0,M){
        c[A[i]].PB({B[i],T[i]});
        c[B[i]].PB({A[i],T[i]});
    }

    REP(i,0,N){
        if(toLeaf[i]!=-1)continue;
        p[i]=i;parents.PB(i);up[i]=i;
        findLeaf(i,c,p,toLeaf,i,up);
    }
   // cout<<"lol";
    REP(i,0,N){
       // cout<<i<<" "<<c[i].size()<<" ";
       if(c[i].size()==0){
            maxLength[i]=0;
            continue;
       }
       if(c[i].size()==1){
        maxLength[i]=toLeaf[i];
        continue;
       }
        if(c[i].size()<3&&p[i]!=i)continue;
        priority_queue<int> pq;
        for(auto u:c[i]){
            if(p[i]==u.F)continue;
          // if(toLeaf[u]==-1)pq.push(grid[i][u]);
            else pq.push(toLeaf[u.F]+u.S);
        }
        maxLength[i]+=pq.top();
        pq.pop();;
        maxLength[i]+=pq.top();
    }
    map<int,pi> m;
    REP(i,0,N){
        if(m.count(up[i])){
            if(m[up[i]].F<maxLength[i]){
                 m[up[i]]=make_pair(maxLength[i],i);
            }
        }
        else{
            m[up[i]]=make_pair(maxLength[i],i);
        }
    }
    
    priority_queue<tuple<int,int,int>> pq2;
    priority_queue<int> maxVals;
    
    for(auto z:parents){
        int u=m[z].S;int u2=u;
        vi tempVal1,tempVal2;
        if(c[u].size()==0){
            maxVals.push(0);
        }
        else if(c[u].size()==1){
            while(leaf[u]!=-1){
                tempVal1.PB(leafVal[u]);
                u=leaf[u];
            }
           // cout<<"lol\n";
            int sum=0;int pos=0;
            while(sum+tempVal1[pos]<=maxLength[u2]/2){
                sum+=tempVal1[pos];
                pos++;
            }
            int sum2=0;pos=0;
            reverse(tempVal1.begin(),tempVal1.end());
            while(sum2+tempVal1[pos]<=maxLength[u2]/2){
                sum2+=tempVal1[pos];
                pos++;
            }
            sum=min(max(sum,maxLength[u2]-sum),max(sum2,maxLength[u2]-sum2));
            maxVals.push(sum);
            
        }
        else{
            for(auto g:c[u]){
                if(g.F==p[u])continue;
                pq2.push({toLeaf[g.F]+g.S,g.F,g.S});
            }
            int x1=get<1>(pq2.top());
            int xx1=get<2>(pq2.top());
            pq2.pop();
            int x2=get<1>(pq2.top());
            int xx2=get<2>(pq2.top());
            tempVal1.PB(xx1);
            tempVal2.PB(xx2);
            while(leaf[x1]!=-1){
                tempVal1.PB(leafVal[x1]);
                x1=leaf[x1];
            }
            while(leaf[x2]!=-1){
                tempVal1.PB(leafVal[x2]);
                x2=leaf[x2];
            }
            reverse(tempVal1.begin(),tempVal1.end());
            for(auto y:tempVal2)tempVal1.PB(y);
            int sum=0;int pos=0;
            while(sum+tempVal1[pos]<=maxLength[u2]/2){
                sum+=tempVal1[pos];
                pos++;
            }
            reverse(tempVal1.begin(),tempVal1.end());
            int sum2=0;pos=0;
            while(sum2+tempVal1[pos]<=maxLength[u2]/2){
                sum2+=tempVal1[pos];
                pos++;
            }
            sum=min(max(sum,maxLength[u2]-sum),max(sum2,maxLength[u2]-sum2));
            maxVals.push(sum);
        }
    }
    //REP(i,0,N)cout<<toLeaf[i]<<" ";
    //cout<<"\n";
    //REP(i,0,N)cout<<maxLength[i]<<" ";
    //cout<<"\n";
    //for(auto g1:maxVals)cout<<g1<<" ";
   // cout<<"\n";
    
    int r1=maxVals.top();
    maxVals.pop();
    int ans=r1;
    if(!maxVals.empty()){
        int r2=maxVals.top();
        maxVals.pop();
        ans=max(ans,r1+r2+L);
        if(!maxVals.empty()){
            int r3=maxVals.top();
            ans=max(ans,r2+r3+2*L);
        } 
    } 
    
    
   // cout<<r1<<" "<<r2<<" "<<r3<<"\n";
    
    for(auto z:parents){
        int k1=m[z].F;
        ans=max(ans,k1);
    }
    return ans;

    return 42;
}

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 16852 KB Output is correct
2 Correct 37 ms 16604 KB Output is correct
3 Correct 25 ms 13528 KB Output is correct
4 Correct 5 ms 2652 KB Output is correct
5 Correct 4 ms 1776 KB Output is correct
6 Correct 8 ms 3932 KB Output is correct
7 Correct 0 ms 440 KB Output is correct
8 Correct 16 ms 7040 KB Output is correct
9 Correct 22 ms 10844 KB Output is correct
10 Incorrect 1 ms 348 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Incorrect 0 ms 348 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 16852 KB Output is correct
2 Correct 37 ms 16604 KB Output is correct
3 Correct 25 ms 13528 KB Output is correct
4 Correct 5 ms 2652 KB Output is correct
5 Correct 4 ms 1776 KB Output is correct
6 Correct 8 ms 3932 KB Output is correct
7 Correct 0 ms 440 KB Output is correct
8 Correct 16 ms 7040 KB Output is correct
9 Correct 22 ms 10844 KB Output is correct
10 Incorrect 1 ms 348 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 12048 KB Output is correct
2 Correct 50 ms 12112 KB Output is correct
3 Correct 49 ms 12048 KB Output is correct
4 Correct 52 ms 12148 KB Output is correct
5 Correct 49 ms 11964 KB Output is correct
6 Correct 58 ms 13300 KB Output is correct
7 Correct 51 ms 12628 KB Output is correct
8 Correct 51 ms 11912 KB Output is correct
9 Correct 48 ms 11728 KB Output is correct
10 Correct 53 ms 12496 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 44 ms 12500 KB Output is correct
13 Correct 55 ms 12456 KB Output is correct
14 Correct 42 ms 12548 KB Output is correct
15 Correct 42 ms 12492 KB Output is correct
16 Correct 43 ms 12492 KB Output is correct
17 Correct 42 ms 12488 KB Output is correct
18 Correct 47 ms 12500 KB Output is correct
19 Correct 42 ms 12488 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 604 KB Output is correct
23 Correct 42 ms 12500 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Incorrect 0 ms 348 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 16852 KB Output is correct
2 Correct 37 ms 16604 KB Output is correct
3 Correct 25 ms 13528 KB Output is correct
4 Correct 5 ms 2652 KB Output is correct
5 Correct 4 ms 1776 KB Output is correct
6 Correct 8 ms 3932 KB Output is correct
7 Correct 0 ms 440 KB Output is correct
8 Correct 16 ms 7040 KB Output is correct
9 Correct 22 ms 10844 KB Output is correct
10 Incorrect 1 ms 348 KB Output isn't correct
11 Halted 0 ms 0 KB -