oj.uz

Submission #1089838

# Submission time Handle Problem Language Result Execution time Memory
1089838 2024-09-17T09:30:41 Z Pekiban Candies (JOI18_candies) C++17
8 / 100
 5000 ms 5704 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
using namespace std;
using ll = long long;
#define pb push_back
    
vector<ll> mxconv(vector<ll> &a, vector<ll> &b) {
    int n = a.size(), m = b.size();
    vector<ll> c(n+m, -1e15  );
    c[0] = 0;
    int i = 1, j = 1;
    while (i < n || j < m) {
        if (i == n) ++j;
        else if (j == m)    ++i;
        else {
            if (a[i] - a[i-1] > b[j] - b[j-1])  ++i;
            else    ++j;
        }
        c[i+j-2] = a[i-1] + b[j-1];
    }
    return c;
}
vector<ll> dq(vector<ll> &a) {
    int n = a.size();
    if (n == 0) return {0};
    if (n == 1) return {0, a[0]};
    vector<ll> L, R;
    for (int i = 0; i < n/2; ++i)   L.pb(a[i]);
    for (int i = n/2; i < n; ++i)   R.pb(a[i]);
    reverse(R.begin(), R.end());
    auto A = dq(L);
    L.pop_back();
    auto B = dq(L);
    auto C = dq(R);
    R.pop_back();
    auto D = dq(R);
    auto E = mxconv(A, D);
    auto F = mxconv(C, B);
    for (int i = 0; i < E.size(); ++i)  E[i] = max(E[i], F[i]);
    return E;
}
// proof by ac lol
int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    vector<ll> a(n);
    for (int i = 0; i < n; ++i) {
        cin >> a[i];
    }
    auto ans = dq(a);
    for (int i = 1; i <= (n+1)/2; ++i) {
        cout << ans[i] << '\n';
    }
}

Compilation message

candies.cpp: In function 'std::vector<long long int> dq(std::vector<long long int>&)':
candies.cpp:40:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |     for (int i = 0; i < E.size(); ++i)  E[i] = max(E[i], F[i]);
      |                     ~~^~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 96 ms 552 KB Output is correct
2 Correct 98 ms 344 KB Output is correct
3 Correct 99 ms 348 KB Output is correct
4 Correct 97 ms 540 KB Output is correct
5 Correct 100 ms 344 KB Output is correct
6 Correct 100 ms 348 KB Output is correct
7 Correct 98 ms 556 KB Output is correct
8 Correct 97 ms 344 KB Output is correct
9 Correct 92 ms 540 KB Output is correct
10 Correct 93 ms 544 KB Output is correct
11 Correct 96 ms 556 KB Output is correct
12 Correct 96 ms 348 KB Output is correct
13 Correct 100 ms 812 KB Output is correct
14 Correct 94 ms 532 KB Output is correct
15 Correct 104 ms 348 KB Output is correct
16 Correct 109 ms 344 KB Output is correct
17 Correct 104 ms 544 KB Output is correct
18 Correct 111 ms 544 KB Output is correct
19 Correct 95 ms 344 KB Output is correct
20 Correct 91 ms 344 KB Output is correct

Subtask #2
0 / 92.0

# Verdict Execution time Memory Grader output
1 Correct 96 ms 552 KB Output is correct
2 Correct 98 ms 344 KB Output is correct
3 Correct 99 ms 348 KB Output is correct
4 Correct 97 ms 540 KB Output is correct
5 Correct 100 ms 344 KB Output is correct
6 Correct 100 ms 348 KB Output is correct
7 Correct 98 ms 556 KB Output is correct
8 Correct 97 ms 344 KB Output is correct
9 Correct 92 ms 540 KB Output is correct
10 Correct 93 ms 544 KB Output is correct
11 Correct 96 ms 556 KB Output is correct
12 Correct 96 ms 348 KB Output is correct
13 Correct 100 ms 812 KB Output is correct
14 Correct 94 ms 532 KB Output is correct
15 Correct 104 ms 348 KB Output is correct
16 Correct 109 ms 344 KB Output is correct
17 Correct 104 ms 544 KB Output is correct
18 Correct 111 ms 544 KB Output is correct
19 Correct 95 ms 344 KB Output is correct
20 Correct 91 ms 344 KB Output is correct
21 Execution timed out 5019 ms 5704 KB Time limit exceeded
22 Halted 0 ms 0 KB -