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Submission #1068783

# Submission time Handle Problem Language Result Execution time Memory
1068783 2024-08-21T12:07:28 Z PotatoTheWarriorFRTT Global Warming (CEOI18_glo) C++14
10 / 100
 2000 ms 2772 KB 
#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
ll p1 = 27644437;
ll p2 = 1000000007;
 
int LIS(int n, int a[]) {
    ll dp[n+1]; // dp[l] = smallest element at which a sequence of size l ends;
    for(int i=1;i<=n;i++) {
        dp[i] = LONG_LONG_MAX;
    }
    int ans = 1;
    dp[1] = a[0];
    for(int i=1;i<n;i++) {
        if(dp[ans] < a[i]) {
            ans++;
            dp[ans] = a[i];
        }else if(a[i] < dp[1]) {
            dp[1] = a[i];
        }else{
            int r = ans;
            int l = 1;
            while(r - l > 1) {
                int m = (r+l)/2;
                if(a[i] < dp[m]) {
                    r = m;
                }else if(a[i] >= dp[m]) {
                    l = m;
                }
            }
            dp[r] = a[i]; 
        }
    }
    return ans;
}

void solve() {
    int n, x; cin >> n >> x;
    int a[n+1];

    for(int i=0;i<n;i++) {
        cin >> a[i];
    }
    if(x == 0) {
        cout << LIS(n, a) << endl;
    }else{
        int ans = 0;
        for(int i=0;i<n;i++) {
            for(int j=i;j<n;j++) {
                for(int d=-x;d<=x;d++) {
                    for(int k=i;k<=j;k++) {
                        a[k]+=d;
                    }
                    ans = max(ans, LIS(n, a));
                    for(int k=i;k<=j;k++) {
                        a[k]-=d;
                    }
                }
            }
        }
        cout << ans << endl;
    }
 
}
int main()   {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    // int t; cin >> t;
    // while(t--) 
        solve();
 
    char dksfjn;
    cin >> dksfjn;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Incorrect 0 ms 348 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Incorrect 0 ms 348 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Incorrect 0 ms 348 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 2652 KB Output is correct
2 Correct 18 ms 2772 KB Output is correct
3 Correct 19 ms 2648 KB Output is correct
4 Correct 20 ms 2652 KB Output is correct
5 Correct 14 ms 2652 KB Output is correct

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2096 ms 860 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2041 ms 1372 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Incorrect 0 ms 348 KB Output isn't correct
4 Halted 0 ms 0 KB -