Submission #8316770
Source Code Expand
#include <bits/stdc++.h> using namespace std; using ll = long long; int main() { cin.tie(0); ios::sync_with_stdio(false); int n, m; cin >> n >> m; vector<ll> x(m); for (int i = 0; i < m; i++) { cin >> x[i]; x[i]--; } auto check = [&](ll ans) { ll pos = 0; for (int i = 0; i < m; i++) { ll L = x[i] - min(pos, x[i]); if (ans < L) return false; ll R = max(ans - 2 * L, (ans - L) / 2); if (R < 0) return false; pos = max(pos, x[i] + R + 1); } return pos >= n; }; ll ng = -1, ok = 2 * n; while (ok - ng > 1) { ll mid = (ok + ng) / 2; (check(mid) ? ok : ng) = mid; } cout << ok << "\n"; return 0; }
Submission Info
Submission Time | |
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Task | D - 壊れた電車 |
User | fine |
Language | C++14 (GCC 5.4.1) |
Score | 100 |
Code Size | 814 Byte |
Status | AC |
Exec Time | 24 ms |
Memory | 1024 KB |
Judge Result
Set Name | Sample | Dataset1 | Dataset2 | Dataset3 | ||||||||
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Score / Max Score | 0 / 0 | 20 / 20 | 60 / 60 | 20 / 20 | ||||||||
Status |
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Set Name | Test Cases |
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Sample | sample-01.txt, sample-02.txt |
Dataset1 | sample-01.txt, sample-02.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt, 01-11.txt, 01-12.txt, 01-13.txt, 01-14.txt, 01-15.txt |
Dataset2 | sample-01.txt, sample-02.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt, 01-11.txt, 01-12.txt, 01-13.txt, 01-14.txt, 01-15.txt, 02-01.txt, 02-02.txt, 02-03.txt, 02-04.txt, 02-05.txt, 02-06.txt, 02-07.txt, 02-08.txt, 02-09.txt, 02-10.txt, 02-11.txt, 02-12.txt, 02-13.txt, 02-14.txt, 02-15.txt, 02-16.txt, 02-17.txt, 02-18.txt, 02-19.txt |
Dataset3 | sample-01.txt, sample-02.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt, 01-11.txt, 01-12.txt, 01-13.txt, 01-14.txt, 01-15.txt, 02-01.txt, 02-02.txt, 02-03.txt, 02-04.txt, 02-05.txt, 02-06.txt, 02-07.txt, 02-08.txt, 02-09.txt, 02-10.txt, 02-11.txt, 02-12.txt, 02-13.txt, 02-14.txt, 02-15.txt, 02-16.txt, 02-17.txt, 02-18.txt, 02-19.txt, 03-01.txt, 03-02.txt, 03-03.txt, 03-04.txt, 03-05.txt, 03-06.txt, 03-07.txt, 03-08.txt, 03-09.txt, 03-10.txt, 03-11.txt, 03-12.txt, 03-13.txt, 03-14.txt, 03-15.txt, 03-16.txt, 03-17.txt, 03-18.txt, 03-19.txt, 03-20.txt, 03-21.txt, 03-22.txt, sample-01.txt, sample-02.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
01-01.txt | AC | 1 ms | 256 KB |
01-02.txt | AC | 1 ms | 256 KB |
01-03.txt | AC | 1 ms | 256 KB |
01-04.txt | AC | 1 ms | 256 KB |
01-05.txt | AC | 1 ms | 256 KB |
01-06.txt | AC | 1 ms | 256 KB |
01-07.txt | AC | 1 ms | 256 KB |
01-08.txt | AC | 1 ms | 256 KB |
01-09.txt | AC | 1 ms | 256 KB |
01-10.txt | AC | 1 ms | 256 KB |
01-11.txt | AC | 1 ms | 256 KB |
01-12.txt | AC | 1 ms | 256 KB |
01-13.txt | AC | 1 ms | 256 KB |
01-14.txt | AC | 1 ms | 256 KB |
01-15.txt | AC | 1 ms | 256 KB |
02-01.txt | AC | 1 ms | 256 KB |
02-02.txt | AC | 1 ms | 256 KB |
02-03.txt | AC | 1 ms | 256 KB |
02-04.txt | AC | 3 ms | 384 KB |
02-05.txt | AC | 18 ms | 1024 KB |
02-06.txt | AC | 9 ms | 640 KB |
02-07.txt | AC | 17 ms | 1024 KB |
02-08.txt | AC | 17 ms | 1024 KB |
02-09.txt | AC | 17 ms | 1024 KB |
02-10.txt | AC | 1 ms | 256 KB |
02-11.txt | AC | 18 ms | 1024 KB |
02-12.txt | AC | 18 ms | 1024 KB |
02-13.txt | AC | 17 ms | 1024 KB |
02-14.txt | AC | 19 ms | 1024 KB |
02-15.txt | AC | 14 ms | 1024 KB |
02-16.txt | AC | 17 ms | 1024 KB |
02-17.txt | AC | 18 ms | 1024 KB |
02-18.txt | AC | 18 ms | 1024 KB |
02-19.txt | AC | 18 ms | 1024 KB |
03-01.txt | AC | 1 ms | 256 KB |
03-02.txt | AC | 1 ms | 256 KB |
03-03.txt | AC | 1 ms | 256 KB |
03-04.txt | AC | 24 ms | 1024 KB |
03-05.txt | AC | 9 ms | 512 KB |
03-06.txt | AC | 11 ms | 640 KB |
03-07.txt | AC | 19 ms | 1024 KB |
03-08.txt | AC | 21 ms | 1024 KB |
03-09.txt | AC | 1 ms | 256 KB |
03-10.txt | AC | 22 ms | 1024 KB |
03-11.txt | AC | 22 ms | 1024 KB |
03-12.txt | AC | 8 ms | 512 KB |
03-13.txt | AC | 21 ms | 1024 KB |
03-14.txt | AC | 21 ms | 1024 KB |
03-15.txt | AC | 24 ms | 1024 KB |
03-16.txt | AC | 16 ms | 1024 KB |
03-17.txt | AC | 20 ms | 1024 KB |
03-18.txt | AC | 22 ms | 1024 KB |
03-19.txt | AC | 22 ms | 1024 KB |
03-20.txt | AC | 22 ms | 1024 KB |
03-21.txt | AC | 22 ms | 1024 KB |
03-22.txt | AC | 22 ms | 1024 KB |
sample-01.txt | AC | 1 ms | 256 KB |
sample-02.txt | AC | 1 ms | 256 KB |