Submission #1777276
Source Code Expand
#include <algorithm> #include <iostream> #include <cstring> #include <cstdio> #include <cmath> using namespace std; inline int getint() { static char c; while ((c = getchar()) < '0' || c > '9'); int res = c - '0'; while ((c = getchar()) >= '0' && c <= '9') res = res * 10 + c - '0'; return res; } const int MaxN = 100000; const int MaxM = MaxN * 2 - 1; int n, m; int a[MaxM + 1]; inline int is_pillar(int l, int x) { if (l > 1 && (a[l] > x) == (a[l - 1] > x)) return a[l] > x; if (l < m && (a[l] > x) == (a[l + 1] > x)) return a[l] > x; return -1; } inline bool check(int x) { if (!is_pillar(n, x)) return true; int pl = -1, vl = -1; for (int i = n; !~vl && i >= 1; --i) if (~(vl = is_pillar(i, x))) pl = i; int pr = -1, vr = -1; for (int i = n; !~vr && i <= m; ++i) if (~(vr = is_pillar(i, x))) pr = i; if (~vl && ~vr) { if (!vl && !vr) return true; int dl = n - pl, dr = pr - n; if (vl == 1) swap(dl, dr); if (!vl && dl < dr) return true; } else { if (!vl || !vr) return true; int w = 0, b = 0; for (int i = 1; i <= m; ++i) a[i] <= x ? ++w : ++b; if (w > b) return true; } return false; } int main() { cin >> n, m = n + n - 1; for (int i = 1; i <= m; ++i) a[i] = getint(); int l = 1, r = m; while (l <= r) { int mid = l + r >> 1; if (check(mid)) r = mid - 1; else l = mid + 1; } cout << l << endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | D - Median Pyramid Hard |
User | InvUsr |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 1514 Byte |
Status | WA |
Exec Time | 22 ms |
Memory | 1024 KB |
Judge Result
Set Name | Sample | All | ||||||
---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 0 / 1300 | ||||||
Status |
|
|
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 | AC | 1 ms | 256 KB |
0_01.txt | AC | 1 ms | 256 KB |
1_00.txt | AC | 1 ms | 256 KB |
1_01.txt | AC | 1 ms | 256 KB |
1_02.txt | AC | 1 ms | 256 KB |
1_03.txt | AC | 11 ms | 1024 KB |
1_04.txt | AC | 11 ms | 1024 KB |
1_05.txt | AC | 21 ms | 1024 KB |
1_06.txt | AC | 21 ms | 1024 KB |
1_07.txt | AC | 21 ms | 1024 KB |
1_08.txt | AC | 22 ms | 1024 KB |
1_09.txt | AC | 11 ms | 1024 KB |
1_10.txt | AC | 11 ms | 1024 KB |
1_11.txt | AC | 22 ms | 1024 KB |
1_12.txt | AC | 22 ms | 1024 KB |
1_13.txt | AC | 21 ms | 1024 KB |
1_14.txt | AC | 21 ms | 1024 KB |
1_15.txt | AC | 12 ms | 1024 KB |
1_16.txt | AC | 12 ms | 1024 KB |
1_17.txt | AC | 13 ms | 1024 KB |
1_18.txt | AC | 12 ms | 1024 KB |
1_19.txt | AC | 13 ms | 1024 KB |
1_20.txt | AC | 13 ms | 1024 KB |
1_21.txt | WA | 12 ms | 1024 KB |
1_22.txt | WA | 12 ms | 1024 KB |
1_23.txt | AC | 17 ms | 1024 KB |
1_24.txt | AC | 18 ms | 1024 KB |
1_25.txt | AC | 14 ms | 1024 KB |
1_26.txt | AC | 18 ms | 1024 KB |
1_27.txt | WA | 13 ms | 1024 KB |
1_28.txt | AC | 17 ms | 1024 KB |
1_29.txt | AC | 14 ms | 1024 KB |
1_30.txt | AC | 14 ms | 1024 KB |
1_31.txt | AC | 17 ms | 1024 KB |
1_32.txt | AC | 16 ms | 1024 KB |
1_33.txt | AC | 13 ms | 1024 KB |
1_34.txt | AC | 17 ms | 1024 KB |
1_35.txt | AC | 16 ms | 1024 KB |
1_36.txt | WA | 15 ms | 1024 KB |
1_37.txt | WA | 15 ms | 1024 KB |
1_38.txt | AC | 17 ms | 1024 KB |
1_39.txt | AC | 15 ms | 1024 KB |
1_40.txt | AC | 14 ms | 1024 KB |
1_41.txt | WA | 18 ms | 1024 KB |
1_42.txt | AC | 15 ms | 1024 KB |
1_43.txt | AC | 18 ms | 1024 KB |
1_44.txt | WA | 15 ms | 1024 KB |
1_45.txt | WA | 16 ms | 1024 KB |
1_46.txt | AC | 15 ms | 1024 KB |
1_47.txt | AC | 12 ms | 1024 KB |
1_48.txt | AC | 13 ms | 1024 KB |
1_49.txt | AC | 14 ms | 1024 KB |
1_50.txt | AC | 12 ms | 1024 KB |
1_51.txt | AC | 12 ms | 1024 KB |
1_52.txt | AC | 12 ms | 1024 KB |
1_53.txt | AC | 12 ms | 1024 KB |
1_54.txt | AC | 12 ms | 1024 KB |