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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#573322 | #9313. Make Max | 2229059239 | WA | 1ms | 7788kb | C++14 | 1.8kb | 2024-09-18 18:10:12 | 2024-09-18 18:10:13 |
Judging History
answer
#include<bits/stdc++.h>
#define int long long
#define pb push_back
#define pii pair<int,int>
using namespace std;
bool debug = 1;
#define dbg(x) if(debug) cerr<<BRIGHT_CYAN<<#x<<COLOR_RESET<<" = "<<(x)<<NORMAL_FAINT<<COLOR_RESET<<endl;
const string COLOR_RESET = "\033[0m", BRIGHT_CYAN = "\033[1;36m", NORMAL_FAINT = "\033[0;2m";
const int N = 2033;
int n, a[N], rk[N], s[N], b[N][N], c[N][N], sb[N][N];
bool check(int x){
for (int i = 1; i <= n; i++){
s[i] = s[i - 1] + (a[i] > x);
}
int cnt = 0;
for (int i = 1; i <= n; i++)
for (int j = i; j <= n; j++)
b[i][j] = !(j - i + 1 - s[j] + s[i - 1] >= (j - i + 2) / 2);
/*for (int i = 1; i <= n; i++)
for (int j = 1; j <= n; j++)
cout << b[i][j] << " \n"[j == n];*/
for (int i = 1; i <= n; i++)
for (int j = 1; j <= n; j++)
sb[i][j] = sb[i - 1][j] + sb[i][j - 1] + b[i][j] - sb[i - 1][j - 1];
for (int i = 1; i <= n; i++)
for (int j = i; j <= n; j++){
c[i][j] = (sb[j][j] - sb[i - 1][j] - sb[j][i - 1] + sb[i - 1][i - 1]);
int sz = (j - i + 2) * (j - i + 1) / 2;
if(sz - c[i][j] >= (sz + 1) / 2)
cnt++;
}
return cnt >= (n * (n + 1) / 2 + 1) / 2;
}
void solve(){
cin >> n;
for (int i = 1; i <= n; i++)
cin >> a[i], rk[i] = a[i];
sort(rk + 1, rk + n + 1);
int l = 1, r = n, mid;
while(l < r){
mid = (l + r) >> 1;
if(check(rk[mid]))
r = mid;
else
l = mid + 1;
}
cout << rk[l];
}
signed main(){
ios::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
int t = 1;
while(t--)
solve();
return 0;
}
//__builtin_popcountll()
// cout<<fixed<<setprecision(2);
Details
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Test #1:
score: 0
Wrong Answer
time: 1ms
memory: 7788kb
input:
4 2 1 2 2 2 2 7 1 1 1 2 2 2 2 3 1 2 3
output:
2
result:
wrong answer 1st numbers differ - expected: '1', found: '2'