oj.uz

Submission #953942

# Submission time Handle Problem Language Result Execution time Memory
953942 2024-03-27T00:14:33 Z AlphaMale06 Global Warming (CEOI18_glo) C++17
0 / 100
 19 ms 6236 KB 
#include <bits/stdc++.h>

using namespace std;

#define pb push_back
#define int long long
#define F first
#define S second

const int N = 2e5+3;
int dp[N], ndp[N];
pair<int, int> mdp[N];

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, d;
    cin >> n >> d;
    int a[n];
    for(int i=0; i< n; i++)cin >> a[i];
    dp[0] = 2e9+1;
    int mx=0;
    for(int i = n-1; i>=0; i--){
        if(a[i]<dp[mx]){
            mx++;
            dp[mx]=a[i];
            continue;
        }
        int l = 1, r = mx;
        while(l<=r){
            int s = l+r>>1;
            if(dp[s]>a[i])l=s+1;
            else r=s-1;
        }
        dp[r]=max(dp[r], a[i]);
        mdp[i] = {mx, dp[mx]};
    }
    int ans=mx;
    if(d==0){
        cout << ans;
        return 0;
    }
    for(int i = 1; i<=n; i++)ndp[i]=1e9+i;
    ndp[0]=-1e9;
    int mxx=0;
    for(int i=0; i < n; i++){
        int l = 0, r = n;
        if(a[i]-d>ndp[mxx]){
            mxx++;
            ndp[mxx]=a[i]-d;
        }
        else{
            while(l<=r){
                int s = l+r>>1;
                if(ndp[s]>=a[i]-d)r=s-1;
                else l=s+1;
            }
            ndp[l]=min(ndp[l], a[i]-d);
        }
        l = 0, r = n;
        while(l<=r){
            int s = l+r>>1;
            if(ndp[s]<mdp[i+1].S)l=s+1;
            else r=s-1;
        }
        ans=max(ans, mdp[i+1].F+r);
    }
    cout << ans;
}

Compilation message

glo.cpp: In function 'int main()':
glo.cpp:32:22: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   32 |             int s = l+r>>1;
      |                     ~^~
glo.cpp:55:26: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   55 |                 int s = l+r>>1;
      |                         ~^~
glo.cpp:63:22: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   63 |             int s = l+r>>1;
      |                     ~^~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Incorrect 1 ms 2396 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Incorrect 1 ms 2396 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Incorrect 1 ms 2396 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 19 ms 6236 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 8 ms 4956 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Incorrect 16 ms 5468 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Incorrect 1 ms 2396 KB Output isn't correct
3 Halted 0 ms 0 KB -