Submission #2671313
Source Code Expand
#include<bits/stdc++.h> using namespace std; #define inf 1e9 #define ll long long #define ull unsigned long long #define M 1000000007 #define P pair<int,int> #define PLL pair<ll,ll> #define FOR(i,m,n) for(int i=m;i<n;i++) #define RFOR(i,m,n) for(int i=m;i>=n;i--) #define rep(i,n) FOR(i,0,n) #define rrep(i,n) RFOR(i,n,0) #define all(a) a.begin(),a.end() const int vx[4] = {0,1,0,-1}; const int vy[4] = {1,0,-1,0}; #define PI 3.14159265 int n; int a[1000000]; int x=0; int main(){ cin>>n; rep(i,n){ cin>>a[i]; x = x^a[i]; } int ans=0; for (int k=30; k>=1; k--) { if (x == 0) break; if (!(x>>(k-1) & 1)) continue; for (size_t i=0; i<n; ++i) { if ((a[i]^(a[i]-1)) == (1<<k)-1) { x ^= (1<<k)-1; ans++; a[i] = 0; break; } } } if(x!=0){ cout<<-1<<endl; } else{ cout<<ans<<endl; } return 0; }
Submission Info
Submission Time | |
---|---|
Task | C - Cheating Nim |
User | mint |
Language | C++14 (GCC 5.4.1) |
Score | 500 |
Code Size | 946 Byte |
Status | AC |
Exec Time | 57 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 | 1 ms | 256 KB |
001.txt | AC | 1 ms | 256 KB |
002.txt | AC | 57 ms | 640 KB |
003.txt | AC | 17 ms | 512 KB |
004.txt | AC | 20 ms | 384 KB |
005.txt | AC | 16 ms | 384 KB |
006.txt | AC | 53 ms | 640 KB |
007.txt | AC | 54 ms | 640 KB |
008.txt | AC | 53 ms | 640 KB |
009.txt | AC | 53 ms | 640 KB |
010.txt | AC | 53 ms | 640 KB |
011.txt | AC | 53 ms | 640 KB |
012.txt | AC | 53 ms | 640 KB |
013.txt | AC | 53 ms | 640 KB |
014.txt | AC | 54 ms | 640 KB |
015.txt | AC | 53 ms | 640 KB |
016.txt | AC | 54 ms | 640 KB |
017.txt | AC | 54 ms | 640 KB |
018.txt | AC | 53 ms | 640 KB |
019.txt | AC | 54 ms | 640 KB |
020.txt | AC | 53 ms | 640 KB |
021.txt | AC | 6 ms | 256 KB |
022.txt | AC | 6 ms | 256 KB |
023.txt | AC | 54 ms | 640 KB |
example0.txt | AC | 1 ms | 256 KB |
example1.txt | AC | 1 ms | 256 KB |