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Submission #897714

# Submission time Handle Problem Language Result Execution time Memory
897714 2024-01-03T15:31:05 Z Malix Dreaming (IOI13_dreaming) C++14
18 / 100
 63 ms 15568 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<maxLength[u2]/2){
                sum+=tempVal1[pos];
                pos++;
            }
            int sum2=0;pos=0;
            while(sum<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<maxLength[u2]/2){
                sum+=tempVal1[pos];
                pos++;
            }
            reverse(tempVal1.begin(),tempVal1.end());
            int sum2=0;pos=0;
            while(sum<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 39 ms 15568 KB Output is correct
2 Correct 34 ms 15088 KB Output is correct
3 Correct 25 ms 12636 KB Output is correct
4 Correct 7 ms 2652 KB Output is correct
5 Correct 4 ms 1624 KB Output is correct
6 Correct 8 ms 3676 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 16 ms 7132 KB Output is correct
9 Correct 22 ms 10692 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 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 39 ms 15568 KB Output is correct
2 Correct 34 ms 15088 KB Output is correct
3 Correct 25 ms 12636 KB Output is correct
4 Correct 7 ms 2652 KB Output is correct
5 Correct 4 ms 1624 KB Output is correct
6 Correct 8 ms 3676 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 16 ms 7132 KB Output is correct
9 Correct 22 ms 10692 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 56 ms 11668 KB Output is correct
2 Correct 51 ms 11740 KB Output is correct
3 Correct 50 ms 11600 KB Output is correct
4 Correct 50 ms 11640 KB Output is correct
5 Correct 51 ms 11604 KB Output is correct
6 Correct 63 ms 12476 KB Output is correct
7 Correct 59 ms 12248 KB Output is correct
8 Correct 50 ms 11488 KB Output is correct
9 Correct 48 ms 11376 KB Output is correct
10 Correct 52 ms 12092 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 44 ms 12424 KB Output is correct
13 Correct 43 ms 12492 KB Output is correct
14 Correct 44 ms 12492 KB Output is correct
15 Correct 49 ms 12488 KB Output is correct
16 Correct 43 ms 12416 KB Output is correct
17 Correct 42 ms 12500 KB Output is correct
18 Correct 43 ms 12500 KB Output is correct
19 Correct 43 ms 12564 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 12492 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 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 39 ms 15568 KB Output is correct
2 Correct 34 ms 15088 KB Output is correct
3 Correct 25 ms 12636 KB Output is correct
4 Correct 7 ms 2652 KB Output is correct
5 Correct 4 ms 1624 KB Output is correct
6 Correct 8 ms 3676 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 16 ms 7132 KB Output is correct
9 Correct 22 ms 10692 KB Output is correct
10 Incorrect 1 ms 348 KB Output isn't correct
11 Halted 0 ms 0 KB -