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Submission #232205

# Submission time Handle Problem Language Result Execution time Memory
232205 2020-05-16T11:08:46 Z nicolaalexandra Global Warming (CEOI18_glo) C++14
47 / 100
 156 ms 6392 KB 
#include <bits/stdc++.h>
#define DIM 200010
using namespace std;
int v[DIM],d[DIM];
pair <int,int> dp_left[DIM],dp_right[DIM];
int n,i,x,k,sol;
int main (){

    //ifstream cin ("date.in");
    //ofstream cout ("date.out");

    cin>>n>>x;
    for (i=1;i<=n;i++)
        cin>>v[i];

    d[1] = 1, k = 1;
    for (i=2;i<=n;i++){
        int st = 1, dr = k;
        while (st <= dr){
            int mid = (st+dr)>>1;
            if (v[d[mid]] < v[i])
                st = mid+1;
            else dr = mid-1;
        }

        if (st == k+1)
            k++;
        d[st] = i;

        dp_left[i] = make_pair(v[d[k]],k); /// elementul cu care se termina scmaxul dintre primele i elemente
    }

    sol = k;

    d[1] = n, k = 1;
    for (i=n-1;i;i--){
        int st = 1, dr = k;
        while (st <= dr){
            int mid = (st+dr)>>1;
            if (v[d[mid]] > v[i])
                st = mid+1;
            else dr = mid-1;
        }

        if (st == k+1)
            k++;
        d[st] = i;

        dp_right[i] = make_pair(v[d[k]],k);
    }

    /// modific un sufix
    for (i=1;i<n;i++){
        int val = dp_left[i].first;
        int val2 = dp_right[i+1].first;
        if (val < val2)
            sol = max (sol,dp_left[i].second + dp_right[i+1].second);
        else {
            int dif = val - val2 + 1;
            if (dif <= x)
                sol = max (sol,dp_left[i].second + dp_right[i+1].second);
        }
    }

    /// modific un prefix

    for (i=2;i<=n;i++){
        int val = dp_left[i-1].first;
        int val2 = dp_right[i].first;
        if (val < val2)
            sol = max (sol,dp_left[i-1].second + dp_right[i].second);
        else {
            int dif = val - val2 + 1;
            if (dif <= x)
                sol = max (sol,dp_left[i-1].second + dp_right[i].second);
        }
    }

    cout<<sol;

    return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Incorrect 4 ms 384 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Incorrect 4 ms 384 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Incorrect 4 ms 384 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 154 ms 6124 KB Output is correct
2 Correct 154 ms 6264 KB Output is correct
3 Correct 154 ms 6116 KB Output is correct
4 Correct 154 ms 6136 KB Output is correct
5 Correct 99 ms 5752 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 43 ms 1792 KB Output is correct
2 Correct 41 ms 1784 KB Output is correct
3 Correct 43 ms 1784 KB Output is correct
4 Correct 29 ms 1656 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 28 ms 1664 KB Output is correct
7 Correct 39 ms 1784 KB Output is correct

Subtask #6
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 78 ms 3320 KB Output is correct
2 Correct 78 ms 3192 KB Output is correct
3 Correct 156 ms 6136 KB Output is correct
4 Correct 100 ms 5752 KB Output is correct
5 Correct 51 ms 3064 KB Output is correct
6 Correct 94 ms 5624 KB Output is correct
7 Correct 128 ms 6392 KB Output is correct
8 Correct 76 ms 3320 KB Output is correct

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Incorrect 4 ms 384 KB Output isn't correct
5 Halted 0 ms 0 KB -