oj.uz

Submission #147248

# Submission time Handle Problem Language Result Execution time Memory
147248 2019-08-28T13:49:49 Z Alexa2001 Triple Jump (JOI19_jumps) C++17
27 / 100
 41 ms 7144 KB 
#include <bits/stdc++.h>

using namespace std;

const int Nmax = 2e5 + 5;
const int inf = 1e9;

vector<pair<int,int>> v;
int a[Nmax], st[Nmax];
int n, L[Nmax], R[Nmax];

void fnd()
{
    int i, nr = 0;

    st[0] = 0;
    a[0] = inf;

    for(i=1; i<=n; ++i)
    {
        while(a[st[nr]] <= a[i])
        {
            v.push_back({st[nr], i});
            --nr;
        }

        v.push_back({st[nr], i});
        st[++nr] = i;
    }
}

int best(int x, int y)
{
    int i; int ans = 0;
    for(i=x; i<=y; ++i) ans = max(ans, a[i]);
    return ans;
}

int main()
{
  //  freopen("triple.in", "r", stdin);
    cin.tie(0); cin.sync_with_stdio(false);
    
    cin >> n;

    int i, q;
    for(i=1; i<=n; ++i) cin >> a[i];

    cin >> q;
    for(i=1; i<=q; ++i) cin >> L[i] >> R[i];

    fnd();

    vector<int> best(n+1);
    for(i=n; i; --i) best[i] = max(best[i+1], a[i]);

    for(i=1; i<=q; ++i)
    {
        int ans = 0;
        for(auto el : v)
        {
            int x, y, z;
            tie(x, y) = el;
            z = 2 * y - x;

            if(x < L[i] || z > R[i]) continue; 

            ans = max(ans, a[x] + a[y] + best[z]);
        }

        cout << ans << endl;
    }

    return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Incorrect 3 ms 376 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Incorrect 3 ms 376 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 7144 KB Output is correct
2 Correct 38 ms 7144 KB Output is correct
3 Correct 35 ms 5996 KB Output is correct
4 Correct 41 ms 7144 KB Output is correct
5 Correct 40 ms 7144 KB Output is correct
6 Correct 33 ms 6504 KB Output is correct
7 Correct 32 ms 6376 KB Output is correct
8 Correct 32 ms 6376 KB Output is correct
9 Correct 36 ms 6744 KB Output is correct

Subtask #4
0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Incorrect 3 ms 376 KB Output isn't correct
3 Halted 0 ms 0 KB -