Submission #3011789


Source Code Expand

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

#define maxn 100000
#define maxm 200000

int n,m;
int a[maxm+5];
int c[maxm+5];

void readin(){
    scanf("%d",&n);
    m=n*2-1;
    for(int i=1;i<=m;i++) {
        scanf("%d",&a[i]);
    }
}

void Turn(int x) {
    for(int i=1;i<=m;i++){
        c[i]=(a[i]>=x);
    }
}

bool judge(int x){
    Turn(x);
    int p1=0,p2=m+1;
    for(int i=n;i>=2;i--){
        if(c[i]==c[i-1]){
            p1=i;
            break;
        }
    }
    for(int i=n;i<m;i++) {
        if(c[i]==c[i+1]) {
            p2=i;
            break;
        }
    }
    if(p1==0&&p2==m+1) return c[1];
    if(n-p1>p2-n) return c[p2];
    else return c[p1]; 
}

int binsearch() {
    int l=0,r=m;
    while(l+1<r) {
        int mid=l+(r-l)/2;
        if(judge(mid)) l=mid;
        else r=mid;
    }
    if(judge(l+1)) return l+1;
    if(!judge(l)) return l-1;
    else return l;
}

int main(){
    readin();
    int ans=binsearch();
    printf("%d",ans);
    return 0;
}

Submission Info

Submission Time
Task D - Median Pyramid Hard
User vjudge1
Language Bash (GNU bash v4.3.11)
Score 0
Code Size 987 Byte
Status RE
Exec Time 4 ms
Memory 616 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 0 / 1300
Status
RE × 2
RE × 57
Set Name Test Cases
Sample 0_00.txt, 0_01.txt
All 0_00.txt, 0_01.txt, 1_00.txt, 1_01.txt, 1_02.txt, 1_03.txt, 1_04.txt, 1_05.txt, 1_06.txt, 1_07.txt, 1_08.txt, 1_09.txt, 1_10.txt, 1_11.txt, 1_12.txt, 1_13.txt, 1_14.txt, 1_15.txt, 1_16.txt, 1_17.txt, 1_18.txt, 1_19.txt, 1_20.txt, 1_21.txt, 1_22.txt, 1_23.txt, 1_24.txt, 1_25.txt, 1_26.txt, 1_27.txt, 1_28.txt, 1_29.txt, 1_30.txt, 1_31.txt, 1_32.txt, 1_33.txt, 1_34.txt, 1_35.txt, 1_36.txt, 1_37.txt, 1_38.txt, 1_39.txt, 1_40.txt, 1_41.txt, 1_42.txt, 1_43.txt, 1_44.txt, 1_45.txt, 1_46.txt, 1_47.txt, 1_48.txt, 1_49.txt, 1_50.txt, 1_51.txt, 1_52.txt, 1_53.txt, 1_54.txt
Case Name Status Exec Time Memory
0_00.txt RE 4 ms 548 KB
0_01.txt RE 4 ms 612 KB
1_00.txt RE 4 ms 616 KB
1_01.txt RE 4 ms 548 KB
1_02.txt RE 4 ms 616 KB
1_03.txt RE 3 ms 548 KB
1_04.txt RE 3 ms 548 KB
1_05.txt RE 4 ms 548 KB
1_06.txt RE 3 ms 548 KB
1_07.txt RE 3 ms 548 KB
1_08.txt RE 4 ms 544 KB
1_09.txt RE 4 ms 548 KB
1_10.txt RE 3 ms 556 KB
1_11.txt RE 4 ms 548 KB
1_12.txt RE 3 ms 556 KB
1_13.txt RE 4 ms 548 KB
1_14.txt RE 4 ms 556 KB
1_15.txt RE 3 ms 548 KB
1_16.txt RE 3 ms 548 KB
1_17.txt RE 3 ms 548 KB
1_18.txt RE 4 ms 548 KB
1_19.txt RE 4 ms 552 KB
1_20.txt RE 4 ms 548 KB
1_21.txt RE 3 ms 548 KB
1_22.txt RE 4 ms 556 KB
1_23.txt RE 4 ms 548 KB
1_24.txt RE 4 ms 548 KB
1_25.txt RE 3 ms 544 KB
1_26.txt RE 3 ms 548 KB
1_27.txt RE 4 ms 548 KB
1_28.txt RE 4 ms 548 KB
1_29.txt RE 4 ms 544 KB
1_30.txt RE 3 ms 556 KB
1_31.txt RE 4 ms 548 KB
1_32.txt RE 3 ms 548 KB
1_33.txt RE 4 ms 556 KB
1_34.txt RE 3 ms 548 KB
1_35.txt RE 4 ms 548 KB
1_36.txt RE 4 ms 548 KB
1_37.txt RE 4 ms 616 KB
1_38.txt RE 4 ms 544 KB
1_39.txt RE 4 ms 556 KB
1_40.txt RE 3 ms 548 KB
1_41.txt RE 4 ms 548 KB
1_42.txt RE 4 ms 548 KB
1_43.txt RE 4 ms 544 KB
1_44.txt RE 3 ms 548 KB
1_45.txt RE 3 ms 556 KB
1_46.txt RE 3 ms 556 KB
1_47.txt RE 3 ms 548 KB
1_48.txt RE 3 ms 548 KB
1_49.txt RE 3 ms 556 KB
1_50.txt RE 4 ms 612 KB
1_51.txt RE 3 ms 548 KB
1_52.txt RE 3 ms 548 KB
1_53.txt RE 3 ms 556 KB
1_54.txt RE 4 ms 548 KB