oj.uz

Submission #312365

# Submission time Handle Problem Language Result Execution time Memory
312365 2020-10-13T04:57:21 Z VROOM_VARUN Sparklers (JOI17_sparklers) C++14
100 / 100
 173 ms 5628 KB 
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
 
#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/rope>
 
using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
 
typedef long long ll;
typedef long double ld;
typedef complex<ld> cd;
 
typedef pair<int, int> pi;
typedef pair<ll,ll> pl;
typedef pair<ld,ld> pd;
 
typedef vector<int> vi;
typedef vector<ld> vd;
typedef vector<ll> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
typedef vector<cd> vcd;
 
template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update>;
 
#define FOR(i, a, b) for (int i=a; i<(b); i++)
#define F0R(i, a) for (int i=0; i<(a); i++)
#define FORd(i,a,b) for (int i = (b)-1; i >= a; i--)
#define F0Rd(i,a) for (int i = (a)-1; i >= 0; i--)
 
#define sz(x) (int)(x).size()
#define mp make_pair
#define pb push_back
#define f first
#define s second
#define lb lower_bound
#define ub upper_bound
#define all(x) x.begin(), x.end()
 
const int MOD = 1000000007;
const ll INF = 1e18;
const int MX = 100001;
 
int N,K,T,mid;
vi X;
 
bool good(vd x, vd y) {
    //if (x[0] > y[0]) return 0;
    pi L = {0,0}, R = {0,0};
    bool ok = 1;
    while (ok) {
        ok = 0;
        while (L.s < sz(x)-1 && x[L.s+1] <= y[R.f]) {
            ok = 1;
            if (x[++L.s] < x[L.f]) L.f = L.s;
        }
        while (R.s < sz(y)-1 && x[L.f] <= y[R.s+1]) {
            ok = 1;
            if (y[++R.s] > y[R.f]) R.f = R.s;
        }
    }
    return L.s == sz(x)-1 && R.s == sz(y)-1;
}
 
bool OK() {
    vd x,y;
    F0Rd(i,K+1) x.pb((ld)2*mid*T*i-X[i]);
    FOR(i,K,N) y.pb((ld)2*mid*T*i-X[i]);
    if (!good(x,y)) return 0;
    reverse(all(x)), reverse(all(y));
    if (!good(x,y)) return 0;
    return 1;
}
 
int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> N >> K >> T; X.resize(N); K--;
    F0R(i,N) cin >> X[i];
    /*mid = 25303;
    cout << OK();
    exit(0);*/
    int lo = 0, hi = 1000000000;
    while (lo < hi) {
        mid = (lo+hi)/2;
        if (OK()) hi = mid;
        else lo = mid+1;
    }
    cout << lo;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 0 ms 384 KB Output is correct
16 Correct 0 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 0 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 0 ms 384 KB Output is correct
21 Correct 0 ms 384 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 0 ms 384 KB Output is correct
16 Correct 0 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 0 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 0 ms 384 KB Output is correct
21 Correct 0 ms 384 KB Output is correct
22 Correct 1 ms 384 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 1 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 1 ms 384 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 1 ms 384 KB Output is correct
35 Correct 1 ms 384 KB Output is correct
36 Correct 2 ms 384 KB Output is correct
37 Correct 1 ms 384 KB Output is correct
38 Correct 2 ms 384 KB Output is correct
39 Correct 1 ms 384 KB Output is correct
40 Correct 2 ms 384 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 0 ms 384 KB Output is correct
16 Correct 0 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 0 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 0 ms 384 KB Output is correct
21 Correct 0 ms 384 KB Output is correct
22 Correct 1 ms 384 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 1 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 1 ms 384 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 1 ms 384 KB Output is correct
35 Correct 1 ms 384 KB Output is correct
36 Correct 2 ms 384 KB Output is correct
37 Correct 1 ms 384 KB Output is correct
38 Correct 2 ms 384 KB Output is correct
39 Correct 1 ms 384 KB Output is correct
40 Correct 2 ms 384 KB Output is correct
41 Correct 104 ms 3212 KB Output is correct
42 Correct 4 ms 528 KB Output is correct
43 Correct 26 ms 1344 KB Output is correct
44 Correct 147 ms 4652 KB Output is correct
45 Correct 153 ms 4516 KB Output is correct
46 Correct 152 ms 4680 KB Output is correct
47 Correct 159 ms 4572 KB Output is correct
48 Correct 144 ms 4260 KB Output is correct
49 Correct 146 ms 4596 KB Output is correct
50 Correct 144 ms 4328 KB Output is correct
51 Correct 154 ms 4628 KB Output is correct
52 Correct 160 ms 5628 KB Output is correct
53 Correct 153 ms 4592 KB Output is correct
54 Correct 160 ms 5388 KB Output is correct
55 Correct 137 ms 4488 KB Output is correct
56 Correct 149 ms 4672 KB Output is correct
57 Correct 148 ms 4588 KB Output is correct
58 Correct 142 ms 4232 KB Output is correct
59 Correct 157 ms 4556 KB Output is correct
60 Correct 165 ms 5524 KB Output is correct
61 Correct 167 ms 5416 KB Output is correct
62 Correct 145 ms 4728 KB Output is correct
63 Correct 158 ms 5328 KB Output is correct
64 Correct 148 ms 4572 KB Output is correct
65 Correct 141 ms 4216 KB Output is correct
66 Correct 149 ms 4388 KB Output is correct
67 Correct 139 ms 4140 KB Output is correct
68 Correct 173 ms 5480 KB Output is correct
69 Correct 162 ms 5540 KB Output is correct