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Submission #973309

# Submission time Handle Problem Language Result Execution time Memory
973309 2024-05-01T17:56:54 Z njoop Global Warming (CEOI18_glo) C++17
0 / 100
 44 ms 3688 KB 
#include <bits/stdc++.h>

using namespace std;

int n, x, idx, arr[200010], pre[200010], ans;
vector<int> dp;

int main() {
    cin.tie(0)->sync_with_stdio(0);
    cin >> n >> x;
    for(int i=1; i<=n; i++) {
        cin >> arr[i];
        idx = lower_bound(dp.begin(), dp.end(), arr[i]) - dp.begin();
        if(idx == dp.size()) dp.push_back(arr[i]);
        else dp[idx] = arr[i];
        pre[i] = dp.size()+1;
    }
    ans = pre[n];
    dp.clear();
    for(int i=n-1; i>=0; i--) {
        idx = lower_bound(dp.begin(), dp.end(), -arr[i]+x) - dp.begin();
        ans = max(ans, pre[i] + idx);
        idx = lower_bound(dp.begin(), dp.end(), -arr[i]) - dp.begin();
        if(idx == dp.size()) dp.push_back(-arr[i]);
        else dp[idx] = -arr[i];
    }
    cout << ans;
    return 0;
}

Compilation message

glo.cpp: In function 'int main()':
glo.cpp:14:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |         if(idx == dp.size()) dp.push_back(arr[i]);
      |            ~~~~^~~~~~~~~~~~
glo.cpp:24:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |         if(idx == dp.size()) dp.push_back(-arr[i]);
      |            ~~~~^~~~~~~~~~~~

Subtask #1
0 / 5.0

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

Subtask #2
0 / 10.0

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

Subtask #3
0 / 13.0

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

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 44 ms 3688 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 11 ms 1116 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Incorrect 18 ms 2140 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

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