Submission #652148

#	Time	Username	Problem	Language	Result	Execution time	Memory
652148		pauloamed	Global Warming (CEOI18_glo)	C++14	28 / 100	2064 ms	1500 KiB

glo

#include<bits/stdc++.h>
using namespace std;

const int MAXN = 50010;

int N, X;
int v[MAXN];
vector<int> lis;

int ans = 0;

void solve(int i){
  vector<int> lis2;
  for(int j = i; j < N; ++j){
    if(v[j] < v[i]) continue;
    
    auto it = lower_bound(lis2.begin(), lis2.end(), v[j]);
    if(it == lis2.end()) lis2.push_back(v[j]);
    else *it = v[j];
  }

  for(int j = 0; j < lis.size(); ++j){
    if(lis[j] < v[i] + X){
      ans = max(ans, (j + 1) + (int) lis2.size());
    }
  }
}


int main(){
  cin.tie(NULL)->sync_with_stdio(false);
  cin >> N >> X;
  for(int i = 0; i < N; ++i) cin >> v[i];

  for(int i = 0; i < N; ++i){
    auto it = lower_bound(lis.begin(), lis.end(), v[i]);
    if(it == lis.end()) lis.push_back(v[i]);
    else *it = v[i];

    if(i + 1 < N) solve(i + 1);
  }
  cout << ans << "\n";
}

Compilation message (stderr)

glo.cpp: In function 'void solve(int)':
glo.cpp:22:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |   for(int j = 0; j < lis.size(); ++j){
      |                  ~~^~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 13 / 13
• Subtask 4: 0 / 10
• Subtask 5: 0 / 20
• Subtask 6: 0 / 17
• Subtask 7: 0 / 25