Submission #2671292
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;
RFOR(k,30,1){
if(!(x>>(k-1)&1)) continue;
rep(i,n){
if(a[i]^(a[i]-1)==(1<<k)-1){
x= 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 |
0 |
Code Size |
875 Byte |
Status |
WA |
Exec Time |
58 ms |
Memory |
640 KB |
Judge Result
Set Name |
Sample |
All |
Score / Max Score |
0 / 0 |
0 / 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 |
58 ms |
640 KB |
003.txt |
AC |
17 ms |
512 KB |
004.txt |
WA |
20 ms |
384 KB |
005.txt |
WA |
17 ms |
384 KB |
006.txt |
AC |
54 ms |
640 KB |
007.txt |
AC |
53 ms |
640 KB |
008.txt |
AC |
54 ms |
640 KB |
009.txt |
AC |
53 ms |
640 KB |
010.txt |
AC |
54 ms |
640 KB |
011.txt |
AC |
53 ms |
640 KB |
012.txt |
AC |
54 ms |
640 KB |
013.txt |
AC |
53 ms |
640 KB |
014.txt |
AC |
53 ms |
640 KB |
015.txt |
AC |
54 ms |
640 KB |
016.txt |
WA |
53 ms |
640 KB |
017.txt |
WA |
54 ms |
640 KB |
018.txt |
AC |
53 ms |
640 KB |
019.txt |
AC |
54 ms |
640 KB |
020.txt |
WA |
53 ms |
640 KB |
021.txt |
WA |
6 ms |
256 KB |
022.txt |
WA |
6 ms |
256 KB |
023.txt |
WA |
54 ms |
640 KB |
example0.txt |
AC |
1 ms |
256 KB |
example1.txt |
AC |
1 ms |
256 KB |