oj.uz

Submission #839219

# Submission time Handle Problem Language Result Execution time Memory
839219 2023-08-29T08:27:49 Z sysia Candies (JOI18_candies) C++17
100 / 100
 82 ms 11444 KB 
//Sylwia Sapkowska
#include <bits/stdc++.h>
#pragma GCC optimize("O3", "unroll-loops")
using namespace std;

void __print(int x) {cerr << x;}
void __print(long long x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << "'" << x << "'";}
void __print(const char *x) {cerr << '"' << x << '"';}
void __print(const string &x) {cerr << '"' << x << '"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ", "; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? ", " : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifdef LOCAL
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif
#define int long long
typedef pair<int, int> T;
 
void solve(){
    int n; cin >> n;
    vector<int>a(n+2), L(n+2), R(n+2);
    for (int i = 1; i<=n; i++) {
        cin >> a[i];
    }
    iota(L.begin(), L.end(), 0);
    iota(R.begin(), R.end(), 0);
    auto cost = a;
    priority_queue<T>pq;
    vector<bool>beg(n+2, 1);
    for (int i = 1; i<=n; i++) pq.push({a[i], i});
    //niezmiennik --> konce przedzialow sa puste
    //przedzial ma zawsze nieparzysta dlugosc --> zmiana zwieksza ilosc ciastek o 1
    //not really, czasami nie da sie dolaczyc hshs
    //claim: przedzialy parzyste na prefiksie i sukfiksie sa useless
    //skoro wybieramy a[1], to a[1] >= a[2], dalej jakby tych dwoch elementow w ogole nie bylo
    //wtedy wartosci nie maja znaczenia, bo ostatni na prefiksie bedzie pusty
    int ans = 0;
    auto valid = [&](T x){
        auto [val, l] = x;
        return val == cost[l] && beg[l] && (R[l]-l)%2 == 0;
    };
    for (int rep = 1; rep <= (n+1)/2; rep++){
        while (!valid(pq.top())) pq.pop();
        auto [val, l] = pq.top(); pq.pop();
        ans += val;
        debug(val, l, R[l]);
        int nl = L[l-1];
        int nr = R[R[l]+1];
        int newcost = cost[nl] + cost[R[l]+1] - cost[l];
        nl = max(nl, 1ll);
        nr = min(nr, n);
        cost[nl] = newcost;
        beg[R[l]+1] = beg[l] = 0;
        beg[nl] = 1;
        pq.push({cost[nl], nl});
        R[nl] = nr; L[nr] = nl;
        cout << ans << "\n";
    }
}
 
int32_t main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
 
    solve();
 
    return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 468 KB Output is correct

Subtask #2
92.0 / 92.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 79 ms 11324 KB Output is correct
22 Correct 82 ms 11292 KB Output is correct
23 Correct 75 ms 11280 KB Output is correct
24 Correct 61 ms 11264 KB Output is correct
25 Correct 62 ms 11328 KB Output is correct
26 Correct 62 ms 11248 KB Output is correct
27 Correct 68 ms 11288 KB Output is correct
28 Correct 69 ms 11380 KB Output is correct
29 Correct 71 ms 11344 KB Output is correct
30 Correct 74 ms 11312 KB Output is correct
31 Correct 68 ms 11328 KB Output is correct
32 Correct 69 ms 11276 KB Output is correct
33 Correct 75 ms 11396 KB Output is correct
34 Correct 75 ms 11372 KB Output is correct
35 Correct 74 ms 11288 KB Output is correct
36 Correct 77 ms 11444 KB Output is correct
37 Correct 80 ms 11280 KB Output is correct
38 Correct 78 ms 11352 KB Output is correct
39 Correct 63 ms 11312 KB Output is correct
40 Correct 61 ms 11252 KB Output is correct
41 Correct 63 ms 11280 KB Output is correct
42 Correct 71 ms 11408 KB Output is correct
43 Correct 71 ms 11272 KB Output is correct
44 Correct 68 ms 11300 KB Output is correct
45 Correct 77 ms 11332 KB Output is correct
46 Correct 69 ms 11308 KB Output is correct
47 Correct 68 ms 11340 KB Output is correct
48 Correct 74 ms 11248 KB Output is correct
49 Correct 71 ms 11324 KB Output is correct
50 Correct 79 ms 11356 KB Output is correct