Submission #1693585
Source Code Expand
#include<bits/stdc++.h>
// Shrotening
#define fst first
#define snd second
#define pb push_back
// Loop
#define FOR(i,a,b) for(long i=(a);i<(b);++i)
#define RFOR(i,a,b) for(long i=(a);i>=(b);--i)
#define REP(i,a) for(long i=0;i<(a);++i)
#define RREP(i,a) for(long i=(a);i>=0;--i)
#define EACH(i,a) for(auto (i)=(a).begin(),_END=(a).end();i!=_END;++i)
#define REACH(i,a) for(auto (i)=(a).rbegin(),_END=(a).rend();i!=_END;++i)
//Algorithm
#define ALL(a) (a).begin(), a.end()
#define RALL(a) (a).rbegin(), a.rend()
#define EXIST(a,x) ((a).find(x)!=(a).end())
#define SORT(a) std::sort((a).begin(), (a).end())
#define UNIQUE(a) std::sort((a).begin(), a.end()), a.erase(std::unique((a).begin(), a.end()), a.end());
#define SUM(a) std::accumulate((a).begin(), (a).end(), 0);
//Setting
#define OPT std::cin.tie(0);std::ios::sync_with_stdio(false);
//debug message
bool debug = true;
#define MSG(s) if(debug){std::cout << s << std::endl;}
#define DEBUG(x) if(debug){std::cout << "debug(" << #x << "): " << x << std::endl;}
//alias
typedef long long LL;
typedef std::vector<char> VC;
typedef std::vector<int> VI;
typedef std::vector<long> VL;
typedef std::vector<long long> VLL;
typedef std::vector< VC > VC2;
typedef std::vector< VI > VI2;
typedef std::vector< VL > VL2;
typedef std::vector< VLL > VLL2;
typedef std::pair<int,int> PII;
const LL MOD = 1e9 + 7;
int N;
int main() {
std::cin >> N;
std::vector<int> mp(N/2 + (N%2 != 0), 0);
REP(i, N) {
int A;
std::cin >> A;
mp[A/2]++;
}
if(N % 2 != 0) {
mp[0]++;
}
if(std::count_if(ALL(mp), [](int x){return x == 2;}) == mp.size()) {
int ans = 1;
REP(i, N/2) {
ans = (ans*2) % MOD;
}
std::cout << ans << std::endl;
} else {
std::cout << 0 << std::endl;
}
}
Submission Info
Submission Time |
|
Task |
C - Lining Up |
User |
b1464296 |
Language |
C++14 (GCC 5.4.1) |
Score |
300 |
Code Size |
1900 Byte |
Status |
AC |
Exec Time |
29 ms |
Memory |
384 KB |
Judge Result
Set Name |
Sample |
All |
Score / Max Score |
0 / 0 |
300 / 300 |
Status |
|
|
Set Name |
Test Cases |
Sample |
sample_01.txt, sample_02.txt, sample_03.txt |
All |
sample_01.txt, sample_02.txt, sample_03.txt, subtask_1_invalid_01.txt, subtask_1_invalid_02.txt, subtask_1_max_01.txt, subtask_1_max_02.txt, subtask_1_max_valid_01.txt, subtask_1_max_valid_02.txt, subtask_1_min_valid_01.txt, subtask_1_rand_01.txt, subtask_1_rand_02.txt, subtask_1_valid_01.txt, subtask_1_valid_02.txt |
Case Name |
Status |
Exec Time |
Memory |
sample_01.txt |
AC |
1 ms |
256 KB |
sample_02.txt |
AC |
1 ms |
256 KB |
sample_03.txt |
AC |
1 ms |
256 KB |
subtask_1_invalid_01.txt |
AC |
25 ms |
384 KB |
subtask_1_invalid_02.txt |
AC |
6 ms |
256 KB |
subtask_1_max_01.txt |
AC |
29 ms |
384 KB |
subtask_1_max_02.txt |
AC |
29 ms |
384 KB |
subtask_1_max_valid_01.txt |
AC |
29 ms |
384 KB |
subtask_1_max_valid_02.txt |
AC |
29 ms |
384 KB |
subtask_1_min_valid_01.txt |
AC |
1 ms |
256 KB |
subtask_1_rand_01.txt |
AC |
18 ms |
384 KB |
subtask_1_rand_02.txt |
AC |
27 ms |
384 KB |
subtask_1_valid_01.txt |
AC |
16 ms |
384 KB |
subtask_1_valid_02.txt |
AC |
7 ms |
256 KB |