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Submission #1050469

# Submission time Handle Problem Language Result Execution time Memory
1050469 2024-08-09T09:55:20 Z sofijavelkovska Stranded Far From Home (BOI22_island) C++17
0 / 100
 155 ms 18260 KB 
#include <bits/stdc++.h>
using namespace std;

const int MAXN=2e5;

int n, m;
int a[MAXN];
long long prefix[MAXN];

bool compare(int x, int y)
{
    return a[x]>a[y];
}

long long sum(int l, int r)
{
    if (l==0)
        return prefix[r];

    return prefix[r]-prefix[l-1];
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    cin >> n >> m;
    for (int i=0; i<n; i++)
        cin >> a[i];
    for (int i=0; i<m; i++)
    {
        int x, y;
        cin >> x >> y;
    }
    int sorted[n];
    for (int i=0; i<n; i++)
        sorted[i]=i;
    sort(sorted, sorted+n, compare);
    int possible[n]={false};
    possible[sorted[0]]=true;
    set<int> larger;
    larger.insert(sorted[0]);
    prefix[0]=a[0];
    for (int i=1; i<=n; i++)
        prefix[i]=prefix[i-1]+a[i];
    for (int i=1; i<n; i++)
    {
        int x=sorted[i];
        int l=-1, r=n;
        auto it=larger.lower_bound(x);
        if (it!=larger.end())
            r=*it;
        if (it!=larger.begin())
        {
            it--;
            l=*it;
        }
        if (l!=-1 && possible[l] && sum(l+1, r-1)>=a[l])
            possible[x]=true;
        if (r!=n && possible[r] && sum(l+1, r-1)>=a[r])
            possible[x]=true;
        larger.insert(x);
    }
    for (int i=0; i<n; i++)
        cout << possible[i];

    return 0;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Incorrect 1 ms 2548 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2512 KB Output is correct
3 Incorrect 103 ms 18212 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 145 ms 18116 KB Output is correct
3 Incorrect 155 ms 18260 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Incorrect 85 ms 18236 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Incorrect 1 ms 2548 KB Output isn't correct
5 Halted 0 ms 0 KB -