oj.uz

Submission #798944

# Submission time Handle Problem Language Result Execution time Memory
798944 2023-07-31T07:52:42 Z vjudge1 Candies (JOI18_candies) C++17
100 / 100
 513 ms 28804 KB 
#include<bits/stdc++.h>

using namespace std;
using ll = long long;

const int N = 2e5 + 10;
const ll INF = 1e16;

int n;
ll a[N];
ll pr[N];

ll seg_sum(int l, int r) {
    if(l <= 0 || r > n) return INF;
    return pr[r - 1] - pr[l - 1];
}
ll inv_sum(int l, int r) {
    if(l <= 0 || r > n) return -INF;
    return pr[r] - pr[l] + a[l];
}
ll func(int l, int r) {
    return inv_sum(l, r) - seg_sum(l, r);
}
set<pair<ll, int>> Afree;
set<pair<int, int>> segments;
set<pair<ll, pair<int, int>>> inv_choices;
ll cur_ans = 0;
void inv_seg(int l, int r) {
    segments.erase({l, r});
    inv_choices.erase({func(l, r), {l, r}});
    cur_ans += func(l, r);
    l--, r++;
    if(!segments.empty()) {
        auto rseg = segments.upper_bound({l, r}), lseg = rseg; lseg--;
        if(rseg != segments.begin()) {
            if(lseg->second == l) {
                l = lseg->first;
                inv_choices.erase({func(lseg->first, lseg->second), {lseg->first, lseg->second}});
                segments.erase(lseg);
            }
        }
        if(rseg != segments.end()) {
            if(rseg->first == r) {
                r = rseg->second;
                inv_choices.erase({func(rseg->first, rseg->second), {rseg->first, rseg->second}});
                segments.erase(rseg);
            }
        }
    }
    segments.insert({l, r});
    inv_choices.insert({func(l, r), {l, r}});
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    cin >> n;
    for(int i = 1; i <= n; i++) 
        cin >> a[i];
    for(int i = 1; i <= n + 1; i++) 
        pr[i] = a[i] + (i - 2 >= 0 ? pr[i - 2] : 0);
    
    for(int i = 1; i <= n; i++) 
        segments.insert({i, i}),
        inv_choices.insert({func(i, i), {i, i}});
    
    for(int _ = 1; _ <= (n + 1) / 2; _++) {
        auto [l, r] = (--inv_choices.end())->second;
        // cout << l << ' ' << r << '\n';
        inv_seg(l, r);
        cout << cur_ans << '\n';
        // for(auto [l, r] : segments) {
        //     cout << '{' << l << ' ' << r << '}' << ' ';
        // }
        // cout << '\n';
    }
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 600 KB Output is correct
2 Correct 2 ms 596 KB Output is correct
3 Correct 2 ms 592 KB Output is correct
4 Correct 2 ms 596 KB Output is correct
5 Correct 2 ms 596 KB Output is correct
6 Correct 2 ms 604 KB Output is correct
7 Correct 2 ms 604 KB Output is correct
8 Correct 2 ms 484 KB Output is correct
9 Correct 2 ms 596 KB Output is correct
10 Correct 2 ms 596 KB Output is correct
11 Correct 2 ms 596 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 2 ms 596 KB Output is correct
14 Correct 2 ms 596 KB Output is correct
15 Correct 2 ms 592 KB Output is correct
16 Correct 2 ms 596 KB Output is correct
17 Correct 2 ms 596 KB Output is correct
18 Correct 3 ms 596 KB Output is correct
19 Correct 2 ms 596 KB Output is correct
20 Correct 2 ms 596 KB Output is correct

Subtask #2
92.0 / 92.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 600 KB Output is correct
2 Correct 2 ms 596 KB Output is correct
3 Correct 2 ms 592 KB Output is correct
4 Correct 2 ms 596 KB Output is correct
5 Correct 2 ms 596 KB Output is correct
6 Correct 2 ms 604 KB Output is correct
7 Correct 2 ms 604 KB Output is correct
8 Correct 2 ms 484 KB Output is correct
9 Correct 2 ms 596 KB Output is correct
10 Correct 2 ms 596 KB Output is correct
11 Correct 2 ms 596 KB Output is correct
12 Correct 2 ms 596 KB Output is correct
13 Correct 2 ms 596 KB Output is correct
14 Correct 2 ms 596 KB Output is correct
15 Correct 2 ms 592 KB Output is correct
16 Correct 2 ms 596 KB Output is correct
17 Correct 2 ms 596 KB Output is correct
18 Correct 3 ms 596 KB Output is correct
19 Correct 2 ms 596 KB Output is correct
20 Correct 2 ms 596 KB Output is correct
21 Correct 433 ms 28720 KB Output is correct
22 Correct 468 ms 28720 KB Output is correct
23 Correct 513 ms 28752 KB Output is correct
24 Correct 173 ms 28616 KB Output is correct
25 Correct 197 ms 28564 KB Output is correct
26 Correct 202 ms 28528 KB Output is correct
27 Correct 184 ms 28752 KB Output is correct
28 Correct 210 ms 28780 KB Output is correct
29 Correct 185 ms 28676 KB Output is correct
30 Correct 192 ms 28736 KB Output is correct
31 Correct 196 ms 28764 KB Output is correct
32 Correct 202 ms 28800 KB Output is correct
33 Correct 319 ms 28492 KB Output is correct
34 Correct 270 ms 28600 KB Output is correct
35 Correct 265 ms 28512 KB Output is correct
36 Correct 365 ms 28724 KB Output is correct
37 Correct 433 ms 28776 KB Output is correct
38 Correct 419 ms 28748 KB Output is correct
39 Correct 172 ms 28604 KB Output is correct
40 Correct 180 ms 28516 KB Output is correct
41 Correct 191 ms 28560 KB Output is correct
42 Correct 183 ms 28788 KB Output is correct
43 Correct 180 ms 28768 KB Output is correct
44 Correct 189 ms 28768 KB Output is correct
45 Correct 215 ms 28780 KB Output is correct
46 Correct 198 ms 28804 KB Output is correct
47 Correct 230 ms 28748 KB Output is correct
48 Correct 255 ms 28480 KB Output is correct
49 Correct 295 ms 28612 KB Output is correct
50 Correct 323 ms 28456 KB Output is correct