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Submission #1022164

# Submission time Handle Problem Language Result Execution time Memory
1022164 2024-07-13T10:41:07 Z amirhoseinfar1385 Shortcut (IOI16_shortcut) C++17
0 / 100
 1 ms 4440 KB 
#include "shortcut.h"
#include<bits/stdc++.h>
using namespace std;
const long long maxn=1000000+10;
long long inf=1e16,n,c;
long long alld[maxn],mainres=inf,mxa[maxn],mxb[maxn];
vector<long long>all;

long long pors(long long l,long long r){
    long long b=all[r]-all[l]+c;
    long long fake=0;
    for(long long i=0;i<n;i++){
        if(i<=l){
            fake=max(fake,alld[i]+all[l]-all[i]+min(c,b-c)+mxb[r]);
            fake=max(fake,alld[i]+all[i]-(i==0?0:all[i-1])+(i==0?0:mxa[i-1]));
        }else if(i>=r){
            fake=max(fake,alld[i]+all[i]-all[r]+min(c,b-c)+mxa[l]);
            fake=max(fake,alld[i]-all[i]+all[i+1]+mxb[i+1]);
        }else{
            fake=max(fake,min(all[i]-all[l],b-(all[i]-all[l]))+mxa[l]+alld[i]);
            fake=max(fake,min(all[r]-all[i],b-(all[r]-all[i]))+mxb[r]+alld[i]);
        }
    }
    for(long long i=l;i<=r;i++){
        for(long long j=i+1;j<=r;j++){
            fake=max(fake,min(b-(all[j]-all[i]),all[j]-all[i])+alld[i]+alld[j]);
        }
    }
    return fake;
}

void solve(long long l,long long r,long long tl=0,long long tr=n-1){
//    cout<<l<<" "<<r<<" "<<tl<<" "<<tr<<endl;
    if(tl>tr||l>r){
        return ;
    }
    int mid=(l+r)>>1;
    long long fake=inf,wh=-1;
    for(int i=tr;i>=tl;i--){
        long long z=pors(i,mid);
        if(z<=fake){
            fake=z;
            wh=i;
        }
    }
    mainres=min(mainres,fake);
    solve(mid+1,r,wh,wh);
    solve(l,mid-1,wh,tr);
}

long long find_shortcut(int n_, std::vector<int> l, std::vector<int> d, int c_)
{
    n=n_;
    c=c_;
    all.push_back(0);
    alld[0]=d[0];
    l.push_back(0);
    for(long long i=1;i<n;i++){
        all.push_back(all.back()+l[i-1]);
        alld[i]=d[i];
    }
    for(long long i=0;i<n;i++){
        if(i!=0){
            mxa[i]=max(mxa[i-1]+l[i-1],alld[i]);
        }else{
            mxa[i]=alld[i];
        }
    }
    all[n]=all[n-1];
    for(long long i=n-1;i>=0;i--){
        mxb[i]=max(mxb[i+1]+l[i],alld[i]);
    }
    solve(0,n-1);
    return mainres;
}

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 4440 KB n = 4, incorrect answer: jury 80 vs contestant 90
2 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 4440 KB n = 4, incorrect answer: jury 80 vs contestant 90
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 4440 KB n = 4, incorrect answer: jury 80 vs contestant 90
2 Halted 0 ms 0 KB -

Subtask #4
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 4440 KB n = 4, incorrect answer: jury 80 vs contestant 90
2 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 4440 KB n = 4, incorrect answer: jury 80 vs contestant 90
2 Halted 0 ms 0 KB -

Subtask #6
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 4440 KB n = 4, incorrect answer: jury 80 vs contestant 90
2 Halted 0 ms 0 KB -

Subtask #7
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 4440 KB n = 4, incorrect answer: jury 80 vs contestant 90
2 Halted 0 ms 0 KB -

Subtask #8
0 / 3.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 4440 KB n = 4, incorrect answer: jury 80 vs contestant 90
2 Halted 0 ms 0 KB -