Submission #1001094
Source Code Expand
class in{struct It{int it;const bool rev;explicit constexpr It(int it_, bool rev=false):it(it_),rev(rev){}int operator*(){return it;}bool operator!=(It& r){return it!=r.it;}void operator++(){rev?--it:++it;}};const It i,n;public:explicit constexpr in(int n):i(0),n(n<0?0:n){}explicit constexpr in(int i,int n):i(i,n<i),n(n){}const It& begin(){return i;}const It& end(){return n;}}; #include <bits/stdc++.h> using namespace std; int main() { cin.tie(nullptr); ios::sync_with_stdio(false); int n; cin >> n; vector<int> a(n); for(int& x : a) cin >> x; int Xor = 0; for(int x : a) Xor ^= x; vector<bool> need(31, false); for(int i : in(31)) { int t = 1 << i; if(Xor & t) need[i] = true; } vector<bool> have(31, false); for(int x : a) { int aim = x ^ (x - 1); for(int i : in(30, -1)) { int t = 1 << i; if(aim & t) { have[i] = true; break; } } } int ans = 0; bool ok = [&]() { bool cur = false; for(int i : in(30, -1)) { if(need[i]) { if(cur == false) { if(have[i] == false) return false; cur = true; ++ans; } else { continue; } } else { if(cur == true) { if(have[i] == false) return false; cur = false; ++ans; } else { continue; } } } return true; }(); cout << (ok ? ans : -1) << endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | C - Cheating Nim |
User | mio_h1917 |
Language | C++14 (GCC 5.4.1) |
Score | 500 |
Code Size | 1861 Byte |
Status | AC |
Exec Time | 15 ms |
Memory | 640 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 500 / 500 | ||||
Status |
|
|
Set Name | Test Cases |
---|---|
Sample | example0.txt, example1.txt |
All | 000.txt, 001.txt, 002.txt, 003.txt, 004.txt, 005.txt, 006.txt, 007.txt, 008.txt, 009.txt, 010.txt, 011.txt, 012.txt, 013.txt, 014.txt, 015.txt, 016.txt, 017.txt, 018.txt, 019.txt, 020.txt, 021.txt, 022.txt, 023.txt, example0.txt, example1.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
000.txt | AC | 2 ms | 256 KB |
001.txt | AC | 2 ms | 256 KB |
002.txt | AC | 15 ms | 640 KB |
003.txt | AC | 8 ms | 512 KB |
004.txt | AC | 8 ms | 384 KB |
005.txt | AC | 6 ms | 384 KB |
006.txt | AC | 15 ms | 640 KB |
007.txt | AC | 15 ms | 640 KB |
008.txt | AC | 15 ms | 640 KB |
009.txt | AC | 15 ms | 640 KB |
010.txt | AC | 15 ms | 640 KB |
011.txt | AC | 15 ms | 640 KB |
012.txt | AC | 15 ms | 640 KB |
013.txt | AC | 15 ms | 640 KB |
014.txt | AC | 15 ms | 640 KB |
015.txt | AC | 15 ms | 640 KB |
016.txt | AC | 15 ms | 640 KB |
017.txt | AC | 15 ms | 640 KB |
018.txt | AC | 15 ms | 640 KB |
019.txt | AC | 15 ms | 640 KB |
020.txt | AC | 15 ms | 640 KB |
021.txt | AC | 3 ms | 256 KB |
022.txt | AC | 3 ms | 256 KB |
023.txt | AC | 14 ms | 640 KB |
example0.txt | AC | 2 ms | 256 KB |
example1.txt | AC | 2 ms | 256 KB |