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Submission #520986

# Submission time Handle Problem Language Result Execution time Memory
520986 2022-01-31T15:21:13 Z Wayne_Yan Global Warming (CEOI18_glo) C++17
62 / 100
 107 ms 5372 KB 
#include <bits/extc++.h>
using namespace std;
using namespace __gnu_pbds;

typedef int64_t ll;
typedef long double ld;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define pb emplace_back
#define mp make_pair
#define mt make_tuple
#define pii pair<int,int>
#define F(n) Fi(i,n)
#define Fi(i,n) Fl(i,0,n)
#define Fl(i,l,n) for(int i=l;i<n;i++)
#define RF(n) RFi(i,n)
#define RFi(i,n) RFl(i,0,n)
#define RFl(i,l,n) for(int i=n-1;i>=l;i--)
#define all(v) begin(v),end(v)
#define siz(v) (ll(v.size()))
#define get_pos(v,x) (lower_bound(all(v),x)-begin(v))
#define sort_uni(v) sort(begin(v),end(v)),v.erase(unique(begin(v),end(v)),end(v))
#define mem(v,x) memset(v,x,sizeof v)
#define ff first
#define ss second
#define mid ((l+r)>>1)
#define RAN(a,b) uniform_int_distribution<int> (a, b)(rng)
#define debug(x) (cerr << (#x) << " = " << x << "\n")
#define cmax(a,b) (a = max(a,b))
#define cmin(a,b) (a = min(a,b))

template <typename T> using max_heap = __gnu_pbds::priority_queue<T,less<T> >;
template <typename T> using min_heap = __gnu_pbds::priority_queue<T,greater<T> >;
template <typename T> using rbt = tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;

signed main(){
  
  int n,x;
  cin >> n >> x;
  int arr[n];
  int rev[n];
  F(n) cin >> arr[i];
  F(n) rev[i] = -arr[n-1-i];

  pii suf[n]; // (length, greatest)
  
  vector<int> v;
  F(n){
    int c = get_pos(v, rev[i]);
    if(c == (int)v.size()){
      v.pb(rev[i]); 
    }else{
      cmin(v[c], rev[i]);
    }
    
    suf[n-1-i] = mp((int)v.size(), -v.back());
  }

  //F(n) printf("%d %d\n", suf[i].ff, suf[i].ss);

  v.clear();
  
  int ans = 0;
  F(n){
    int c = get_pos(v, arr[i]);
    if( c == (int) v.size()){
      v.pb(arr[i]);
    }else{
      cmin(v[c], arr[i]);
    }

    if(i == n-1) break;
    
    cmax(ans, suf[i+1].ff + (int)get_pos(v, suf[i+1].ss + x));
  }
  
  printf("%d", ans);
  return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 296 KB Output is correct
16 Correct 0 ms 204 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 1 ms 300 KB Output is correct

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 296 KB Output is correct
16 Correct 0 ms 204 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 1 ms 300 KB Output is correct
19 Incorrect 1 ms 304 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 107 ms 4888 KB Output is correct
2 Correct 107 ms 4948 KB Output is correct
3 Correct 99 ms 4932 KB Output is correct
4 Correct 102 ms 4992 KB Output is correct
5 Correct 62 ms 5144 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 1420 KB Output is correct
2 Correct 26 ms 1476 KB Output is correct
3 Correct 24 ms 1540 KB Output is correct
4 Correct 16 ms 1580 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 22 ms 1456 KB Output is correct
7 Correct 24 ms 1604 KB Output is correct

Subtask #6
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 2804 KB Output is correct
2 Correct 49 ms 2712 KB Output is correct
3 Correct 101 ms 4920 KB Output is correct
4 Correct 66 ms 5152 KB Output is correct
5 Correct 32 ms 2732 KB Output is correct
6 Correct 60 ms 5036 KB Output is correct
7 Correct 86 ms 5372 KB Output is correct
8 Correct 49 ms 2828 KB Output is correct

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 296 KB Output is correct
16 Correct 0 ms 204 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 1 ms 300 KB Output is correct
19 Incorrect 1 ms 304 KB Output isn't correct
20 Halted 0 ms 0 KB -