Submission #542135

#	Time	Username	Problem	Language	Result	Execution time	Memory
542135		juankipedia	Global Warming (CEOI18_glo)	C++14	100 / 100	112 ms	5796 KiB

glo

# include <bits/stdc++.h>
using namespace std;
/*************************************************************************************/
# define endl "\n"
# define io_boost std::ios_base::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
typedef unsigned long long int ulli;
typedef long long int lli;
/*************************************JUANKIPEDIA*************************************/

const int MAXN = 200005;

int n;
lli x, t[MAXN];

int main(){
    cin >> n >> x;
    for(int i = 0; i < n; i++) cin >> t[i];

    int L[n + 5], ans = 0;
    vector<int> l;
    for(int i = 0; i < n; i++){
        int j = lower_bound(l.begin(), l.end(), t[i]) - l.begin();
        if(j == l.size()) l.push_back(t[i]);
        else l[j] = t[i];
        L[i] = j + 1;
        ans = max(ans, L[i]);
    }
    l.assign(n + 5, numeric_limits<int>::max());
    for(int i = n - 1; i >= 0; i--){
        int j = lower_bound(l.begin(), l.end(), -t[i] + x) - l.begin();
        ans = max(ans, L[i] + j);
        j = lower_bound(l.begin(), l.end(), -t[i]) - l.begin();
        l[j] = -t[i];
        
    }
    cout <<  ans << endl;
    return 0;
}

Compilation message (stderr)

glo.cpp: In function 'int main()':
glo.cpp:23:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         if(j == l.size()) l.push_back(t[i]);
      |            ~~^~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 13 / 13
• Subtask 4: 10 / 10
• Subtask 5: 20 / 20
• Subtask 6: 17 / 17
• Subtask 7: 25 / 25