oj.uz

Submission #231244

# Submission time Handle Problem Language Result Execution time Memory
231244 2020-05-13T06:19:14 Z xiaowuc1 Candies (JOI18_candies) C++14
100 / 100
 983 ms 31484 KB 
#include <algorithm>
#include <bitset>
#include <cassert>
#include <chrono>
#include <complex>
#include <cstring>
#include <iomanip>
#include <iostream>
#include <map>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <unordered_set>
#include <vector>

using namespace std;

// BEGIN NO SAD
#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define trav(a, x) for(auto& a : x)
#define all(x) x.begin(), x.end()
#define sz(x) (int)(x).size()
#define derr if(1) cerr
typedef vector<int> vi;
// END NO SAD

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

typedef pair<ll, pii> state;

int l[300000];
int torhs[300000];
int tolhs[300000];
int n, k;

set<state> cands;
map<pii, ll> rev;

void ins(pii link, ll cost) {
  rev[link] = cost;
  cands.insert(state(cost, link));
}
ll erase(pii link) {
  if(!rev.count(link)) return -1e18;
  ll cost = rev[link];
  if(cands.erase(state(cost, link)) == 1) {
    return cost;
  }
  return -1e18;
}

void solve() {
  cin >> n;
  for(int i = 1; i <= n; i++) cin >> l[i];
  for(int i = 1; i <= n; i++) {
    ins({i-1, i}, -l[i]);
    torhs[i-1] = i;
    tolhs[i] = i-1;
  }
  k = (n+1)/2;
  ll ret = 0;
  while(k--) {
    state cand = *cands.begin();
    ret -= cand.first;
    cands.erase(cand);
    int nlhs = tolhs[cand.second.first];
    int nrhs = torhs[cand.second.second];
    vector<ll> v;
    v.push_back(erase({nlhs, cand.second.first}));
    v.push_back(erase({cand.second.second, nrhs}));
    if(min(v[0], v[1]) > -1e18) {
      ins({nlhs, nrhs}, (v[0] - (cand.first) + v[1]));
      torhs[nlhs] = nrhs;
      tolhs[nrhs] = nlhs;
    }
    cout << ret << "\n"; cout << flush;
  }
}


// are there edge cases (N=1?)
// are array sizes proper (scaled by proper constant, for example 2* for koosaga tree)
// integer overflow?
// DS reset properly between test cases

int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL); cout.tie(NULL);
  solve();
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 640 KB Output is correct
2 Correct 9 ms 640 KB Output is correct
3 Correct 9 ms 768 KB Output is correct
4 Correct 9 ms 768 KB Output is correct
5 Correct 9 ms 640 KB Output is correct
6 Correct 9 ms 640 KB Output is correct
7 Correct 9 ms 640 KB Output is correct
8 Correct 9 ms 640 KB Output is correct
9 Correct 9 ms 640 KB Output is correct
10 Correct 9 ms 768 KB Output is correct
11 Correct 9 ms 768 KB Output is correct
12 Correct 9 ms 768 KB Output is correct
13 Correct 9 ms 640 KB Output is correct
14 Correct 9 ms 640 KB Output is correct
15 Correct 9 ms 640 KB Output is correct
16 Correct 9 ms 768 KB Output is correct
17 Correct 9 ms 640 KB Output is correct
18 Correct 9 ms 640 KB Output is correct
19 Correct 11 ms 768 KB Output is correct
20 Correct 9 ms 640 KB Output is correct

Subtask #2
92.0 / 92.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 640 KB Output is correct
2 Correct 9 ms 640 KB Output is correct
3 Correct 9 ms 768 KB Output is correct
4 Correct 9 ms 768 KB Output is correct
5 Correct 9 ms 640 KB Output is correct
6 Correct 9 ms 640 KB Output is correct
7 Correct 9 ms 640 KB Output is correct
8 Correct 9 ms 640 KB Output is correct
9 Correct 9 ms 640 KB Output is correct
10 Correct 9 ms 768 KB Output is correct
11 Correct 9 ms 768 KB Output is correct
12 Correct 9 ms 768 KB Output is correct
13 Correct 9 ms 640 KB Output is correct
14 Correct 9 ms 640 KB Output is correct
15 Correct 9 ms 640 KB Output is correct
16 Correct 9 ms 768 KB Output is correct
17 Correct 9 ms 640 KB Output is correct
18 Correct 9 ms 640 KB Output is correct
19 Correct 11 ms 768 KB Output is correct
20 Correct 9 ms 640 KB Output is correct
21 Correct 951 ms 31224 KB Output is correct
22 Correct 901 ms 31204 KB Output is correct
23 Correct 953 ms 31424 KB Output is correct
24 Correct 550 ms 30972 KB Output is correct
25 Correct 565 ms 31224 KB Output is correct
26 Correct 555 ms 31072 KB Output is correct
27 Correct 551 ms 31228 KB Output is correct
28 Correct 554 ms 31352 KB Output is correct
29 Correct 584 ms 31352 KB Output is correct
30 Correct 580 ms 31156 KB Output is correct
31 Correct 580 ms 31224 KB Output is correct
32 Correct 598 ms 31224 KB Output is correct
33 Correct 714 ms 31096 KB Output is correct
34 Correct 740 ms 30936 KB Output is correct
35 Correct 767 ms 31096 KB Output is correct
36 Correct 929 ms 31484 KB Output is correct
37 Correct 983 ms 31300 KB Output is correct
38 Correct 916 ms 31352 KB Output is correct
39 Correct 534 ms 31132 KB Output is correct
40 Correct 573 ms 31096 KB Output is correct
41 Correct 566 ms 31096 KB Output is correct
42 Correct 553 ms 31300 KB Output is correct
43 Correct 597 ms 31248 KB Output is correct
44 Correct 571 ms 31356 KB Output is correct
45 Correct 569 ms 31260 KB Output is correct
46 Correct 581 ms 31352 KB Output is correct
47 Correct 591 ms 31204 KB Output is correct
48 Correct 732 ms 31224 KB Output is correct
49 Correct 698 ms 31096 KB Output is correct
50 Correct 716 ms 31100 KB Output is correct