oj.uz

Submission #1089833

# Submission time Handle Problem Language Result Execution time Memory
1089833 2024-09-17T09:25:00 Z Pekiban Candies (JOI18_candies) C++17
100 / 100
 275 ms 16896 KB 
#include <bits/stdc++.h>

using namespace std;
using ll = long long;
#define pb push_back

const ll inf = 1e15;
vector<ll> mxconv(vector<ll> &a, vector<ll> &b) {
    int n = a.size(), m = b.size();
    vector<ll> c(n+m-1);
    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<vector<vector<ll>>> dq(vector<ll> &a) { // dp[i][b1][b2] = uzmes ih i b1 = da li uzmes poslednji b2 = da li uzmes prvi
    int n = a.size();
    if (n == 0) return {{{{0}, {0}}}, {{{0}, {0}}}};
    if (n == 1) return {{{{0, -inf}, {0, -inf}}}, {{{0, -inf}, {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]);
    auto A = dq(L), B = dq(R);
    vector<vector<vector<ll>>> dp(2, vector<vector<ll>>(2, vector<ll>(1 + (n+1)/2, -inf)));
    for (int X = 0; X < 2; ++X) {
        for (int Y = 0; Y < 2; ++Y) {
            auto t1 = mxconv(A[X][0], B[0][Y]);
            auto t2 = mxconv(A[X][1], B[0][Y]);
            auto t3 = mxconv(A[X][0], B[1][Y]);
            for (int i = 0; i <= (n+1)/2; ++i) {
                dp[X][Y][i] = max({
                (i < t1.size() ? t1[i] : -inf), 
                (i < t2.size() ? t2[i] : -inf), 
                (i < t3.size() ? t3[i] : -inf)});
            }
        }
    }
    return dp;
}
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 << max({ans[0][0][i], ans[0][1][i], ans[1][1][i], ans[1][0][i]}) << '\n';
	}
}

Compilation message

candies.cpp: In function 'std::vector<std::vector<std::vector<long long int> > > dq(std::vector<long long int>&)':
candies.cpp:40:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |                 (i < t1.size() ? t1[i] : -inf),
      |                  ~~^~~~~~~~~~~
candies.cpp:41:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |                 (i < t2.size() ? t2[i] : -inf),
      |                  ~~^~~~~~~~~~~
candies.cpp:42:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |                 (i < t3.size() ? t3[i] : -inf)});
      |                  ~~^~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 600 KB Output is correct
2 Correct 3 ms 600 KB Output is correct
3 Correct 3 ms 540 KB Output is correct
4 Correct 3 ms 604 KB Output is correct
5 Correct 3 ms 468 KB Output is correct
6 Correct 3 ms 604 KB Output is correct
7 Correct 3 ms 600 KB Output is correct
8 Correct 3 ms 600 KB Output is correct
9 Correct 3 ms 604 KB Output is correct
10 Correct 3 ms 600 KB Output is correct
11 Correct 5 ms 604 KB Output is correct
12 Correct 3 ms 604 KB Output is correct
13 Correct 3 ms 604 KB Output is correct
14 Correct 3 ms 604 KB Output is correct
15 Correct 3 ms 604 KB Output is correct
16 Correct 3 ms 604 KB Output is correct
17 Correct 3 ms 604 KB Output is correct
18 Correct 3 ms 548 KB Output is correct
19 Correct 3 ms 604 KB Output is correct
20 Correct 2 ms 604 KB Output is correct

Subtask #2
92.0 / 92.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 600 KB Output is correct
2 Correct 3 ms 600 KB Output is correct
3 Correct 3 ms 540 KB Output is correct
4 Correct 3 ms 604 KB Output is correct
5 Correct 3 ms 468 KB Output is correct
6 Correct 3 ms 604 KB Output is correct
7 Correct 3 ms 600 KB Output is correct
8 Correct 3 ms 600 KB Output is correct
9 Correct 3 ms 604 KB Output is correct
10 Correct 3 ms 600 KB Output is correct
11 Correct 5 ms 604 KB Output is correct
12 Correct 3 ms 604 KB Output is correct
13 Correct 3 ms 604 KB Output is correct
14 Correct 3 ms 604 KB Output is correct
15 Correct 3 ms 604 KB Output is correct
16 Correct 3 ms 604 KB Output is correct
17 Correct 3 ms 604 KB Output is correct
18 Correct 3 ms 548 KB Output is correct
19 Correct 3 ms 604 KB Output is correct
20 Correct 2 ms 604 KB Output is correct
21 Correct 264 ms 16628 KB Output is correct
22 Correct 270 ms 16460 KB Output is correct
23 Correct 267 ms 16464 KB Output is correct
24 Correct 263 ms 16464 KB Output is correct
25 Correct 229 ms 16464 KB Output is correct
26 Correct 237 ms 16464 KB Output is correct
27 Correct 261 ms 16520 KB Output is correct
28 Correct 242 ms 16504 KB Output is correct
29 Correct 247 ms 16896 KB Output is correct
30 Correct 240 ms 16720 KB Output is correct
31 Correct 238 ms 16508 KB Output is correct
32 Correct 253 ms 16512 KB Output is correct
33 Correct 244 ms 16464 KB Output is correct
34 Correct 256 ms 16276 KB Output is correct
35 Correct 245 ms 16480 KB Output is correct
36 Correct 275 ms 16204 KB Output is correct
37 Correct 265 ms 16136 KB Output is correct
38 Correct 262 ms 16204 KB Output is correct
39 Correct 239 ms 15952 KB Output is correct
40 Correct 230 ms 16212 KB Output is correct
41 Correct 250 ms 15948 KB Output is correct
42 Correct 234 ms 16212 KB Output is correct
43 Correct 244 ms 16208 KB Output is correct
44 Correct 237 ms 16208 KB Output is correct
45 Correct 242 ms 16224 KB Output is correct
46 Correct 245 ms 16212 KB Output is correct
47 Correct 243 ms 16260 KB Output is correct
48 Correct 253 ms 15952 KB Output is correct
49 Correct 241 ms 16084 KB Output is correct
50 Correct 257 ms 15952 KB Output is correct