제출 #754357

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
754357		sangeraf	Global Warming (CEOI18_glo)	C++17	100 / 100	129 ms	4500 KiB

glo

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

int main(){
    int n, x; cin >> n >> x;
    vector<long long> v(n+1, 0);
    for(int i=1; i<=n; i++){
        cin >> v[i];
    }

    vector<long long> lj;
    lj.push_back(v[1]);
    vector<int> elol(n+1, 0);
    elol[1]=1;
    for(int i=2; i<=n; i++){
        int j = lower_bound(lj.begin(), lj.end(), v[i]) - lj.begin();
        elol[i]=j+1;
        if(j == lj.size()){
            lj.push_back(0);
        }
        lj[j]=v[i];
    }

    lj.clear();
    lj.push_back(-v[n]);
    vector<int> hatul(n+2, 0);
    if(v[n-1] < v[n]+x) hatul[n]=1;
    for(int i=n-1; i>0; i--){
        int j = lower_bound(lj.begin(), lj.end(), -v[i]) - lj.begin();
        if(j == lj.size()){
            lj.push_back(0);
        }
        lj[j]=-v[i];
        hatul[i] = lower_bound(lj.begin(), lj.end(), -1*(v[i-1]-x)) - lj.begin();
    }

    int maxi=0;
    for(int i=0; i<=n; i++){
        maxi=max(maxi, elol[i]+hatul[i+1]);
    }
    cout << maxi << endl;


    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

glo.cpp: In function 'int main()':
glo.cpp:18:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |         if(j == lj.size()){
      |            ~~^~~~~~~~~~~~
glo.cpp:30:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |         if(j == lj.size()){
      |            ~~^~~~~~~~~~~~

• 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