제출 #1274672

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1274672		sakka	Global Warming (CEOI18_glo)	C++20	10 / 100	34 ms	3152 KiB

glo

#include<bits/stdc++.h>
#define ll long long
#define fi first
#define sec second
#define pb push_back
#define pint pair<long long, long long>
using namespace std;
void freop(){
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
}
const ll INF = 1e18, mod = 1e9+7;
ll n, x;
vector<ll>vec(2e5+2);

void solve(){
    cin >> n >> x;
    for(int i=1; i<=n; i++){
        cin >> vec[i];
    }

    vector<ll> lis;
    ll mxsz = 0;
    ll idle, idri;
    for(int i=1; i<=n; i++){
        if(!lis.size()){
            lis.pb(vec[i]);
        }
        else{
            auto it = lower_bound(lis.begin(), lis.end(), vec[i]) - lis.begin();
            if(it == lis.size()) lis.pb(vec[i]);
            else lis[it] = vec[i];
        }

        if(lis.size() > mxsz){
            mxsz = lis.size();
            idle = i;
        }
    }
    lis.clear(); mxsz = 0;

    for(int i=n; i>idle; i--){
        if(!lis.size()){
            lis.pb(-vec[i]);
        }
        else{
            auto it = lower_bound(lis.begin(), lis.end(), -vec[i]) - lis.begin();
            if(it == lis.size()) lis.pb(-vec[i]);
            else lis[it] = -vec[i];
        }

        if(lis.size() > mxsz){
            mxsz = lis.size();
            idri = i;
        }
    }

    for(int i=1; i<=idle; i++){
        vec[i] -= x;
    }

    mxsz = 0; lis.clear();

    for(int i=1; i<=n; i++){
        if(!lis.size()){
            lis.pb(vec[i]);
        }
        else{
            auto it = lower_bound(lis.begin(), lis.end(), vec[i]) - lis.begin();
            if(it == lis.size()) lis.pb(vec[i]);
            else lis[it] = vec[i];
        }

        if(lis.size() > mxsz){
            mxsz = lis.size();
            idle = i;
        }
    }

    cout << mxsz << endl;

}

int main(){
    ios_base :: sync_with_stdio(0); cin.tie(0); cout.tie(0);
    // freop();
    solve();
}   

컴파일 시 표준 에러 (stderr) 메시지

glo.cpp: In function 'void freop()':
glo.cpp:9:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |     freopen("input.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
glo.cpp:10:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     freopen("output.txt", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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