Submission #998045

#	Time	Username	Problem	Language	Result	Execution time	Memory
998045		guagua0407	Editor (BOI15_edi)	C++17	100 / 100	164 ms	30292 KiB

edi

//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

int dx[4]={0,0,1,-1};
int dy[4]={1,-1,0,0};

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

const int mxn=3e5+5;
int prv[mxn][20];
int e[mxn];
int lev[mxn];
int cur=0;

int main() {_
    int n;
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>e[i];
        e[i]*=-1;
        lev[i]=max(0,e[i]);
        if(e[i]>0){
            int x=i-1;
            for(int j=19;j>=0;j--){
                if(lev[prv[x][j]]>=lev[i]){
                    x=prv[x][j];
                }
            }
            x=prv[x][0];
            if(lev[i-1]<lev[i]){
                x=i-1;
            }
            int y=x-1;
            for(int j=19;j>=0;j--){
                if(lev[prv[y][j]]>=lev[i]){
                    y=prv[y][j];
                }
            }
            y=prv[y][0];
            if(lev[x-1]<lev[i]){
                y=x-1;
            }
            prv[i][0]=y;
            for(int j=1;j<20;j++){
                prv[i][j]=prv[prv[i][j-1]][j-1];
            }
        }
        int ans=i;
        for(int j=19;j>=0;j--){
            if(lev[prv[ans][j]]>0){
                ans=prv[ans][j];
            }
        }
        if(lev[ans]>0) ans=prv[ans][0];
        cout<<-e[ans]<<'\n';
    }
    return 0;
}
//maybe its multiset not set
//yeeorz
//laborz

Compilation message (stderr)

edi.cpp: In function 'void setIO(std::string)':
edi.cpp:15:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
edi.cpp:16:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 15 / 15
• Subtask 3: 28 / 28
• Subtask 4: 37 / 37