Submission #3440191
Source Code Expand
#include<iostream> #include<cstdio> #include<algorithm> #define ll long long using namespace std; int n,l,r,a[100001],s[100001],c[200001]; int lowbit(int x){ return x&(-x); } long long query(int x){ int i; long long sum=0; for(i=x;i>=1;i-=lowbit(i)) sum+=c[i]; return sum; } void add(int x){ for(int i=x;i<=2*n;i+=lowbit(i)) c[i]++; } bool check(int x){ int i; long long sum=0; for(i=1;i<=2*n;i++) c[i]=0; for(i=1;i<=n;i++) s[i]=s[i-1]+(a[i]>=x); for(i=0;i<=n;i++){ sum+=query(s[i]+n); add(s[i]+n); } return sum>=1ll*n*(n+1)/4; } int main(){ int mid,i; cin >> n; for(i=1;i<=n;i++){ cin >> a[i]; r=max(r,a[i]); } while(l<=r){ mid=(l+r)/2; if(check(mid)) l=mid+1; else r=mid-1; } cout << r; return 0; }
Submission Info
Submission Time | |
---|---|
Task | D - Median of Medians |
User | tzr000 |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 810 Byte |
Status | WA |
Exec Time | 123 ms |
Memory | 1792 KB |
Judge Result
Set Name | Sample | All | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 0 / 700 | ||||||||
Status |
|
|
Set Name | Test Cases |
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Sample | 0_00.txt, 0_01.txt, 0_02.txt |
All | 0_00.txt, 0_01.txt, 0_02.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 |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
0_00.txt | AC | 1 ms | 256 KB |
0_01.txt | AC | 1 ms | 256 KB |
0_02.txt | WA | 1 ms | 256 KB |
1_00.txt | AC | 1 ms | 256 KB |
1_01.txt | AC | 1 ms | 256 KB |
1_02.txt | AC | 23 ms | 1792 KB |
1_03.txt | AC | 122 ms | 1792 KB |
1_04.txt | WA | 67 ms | 1792 KB |
1_05.txt | WA | 73 ms | 1792 KB |
1_06.txt | WA | 67 ms | 1792 KB |
1_07.txt | WA | 71 ms | 1792 KB |
1_08.txt | WA | 123 ms | 1792 KB |
1_09.txt | WA | 120 ms | 1792 KB |
1_10.txt | WA | 113 ms | 1792 KB |
1_11.txt | WA | 110 ms | 1792 KB |
1_12.txt | WA | 115 ms | 1792 KB |
1_13.txt | WA | 118 ms | 1792 KB |
1_14.txt | WA | 118 ms | 1792 KB |
1_15.txt | WA | 116 ms | 1792 KB |