Submission #7998190
Source Code Expand
#include <iostream> #include <cstdio> #include <string> //ranker using namespace std; #define REPS(i, a, n) for (int i = (a); i < (n); ++i) #define REP(i, n) REPS(i, 0, n) #define RREP(i, n) REPS(i, 1, n + 1) #define DEPS(i, a, n) for (int i = (a); i >= n; --i) #define DEP(i, n) DEPS(i, n, 0) int main(){ cin.tie(0); ios::sync_with_stdio(false); int N; cin >> N; int N2, N0; N2 = N/2; N0 = N%2; int A[N]; int c[N]={0}; int temp; REP(i, N){ cin >> temp; c[temp]++; } int ans = 0; if(N0==0){ for(int i=1; i<N; i += 2){ if(c[i] != 2){ cout << 0 << endl; return 0; } } } if(N0==1){ if(c[0] != 1){ cout << 0 << endl; return 0; } for(int i=2; i<N; i += 2){ if(c[i] != 2){ ans = 0; cout << 0 << endl; return 0; } } } long long int tot = 1; REP(i, N2) (tot *= 2) %= 1000000000+7; cout << tot << endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | C - Lining Up |
User | alter0sss |
Language | C++14 (GCC 5.4.1) |
Score | 300 |
Code Size | 1036 Byte |
Status | AC |
Exec Time | 10 ms |
Memory | 640 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 | 8 ms | 640 KB |
subtask_1_invalid_02.txt | AC | 3 ms | 384 KB |
subtask_1_max_01.txt | AC | 9 ms | 640 KB |
subtask_1_max_02.txt | AC | 9 ms | 640 KB |
subtask_1_max_valid_01.txt | AC | 9 ms | 640 KB |
subtask_1_max_valid_02.txt | AC | 10 ms | 640 KB |
subtask_1_min_valid_01.txt | AC | 1 ms | 256 KB |
subtask_1_rand_01.txt | AC | 6 ms | 512 KB |
subtask_1_rand_02.txt | AC | 9 ms | 640 KB |
subtask_1_valid_01.txt | AC | 6 ms | 512 KB |
subtask_1_valid_02.txt | AC | 3 ms | 384 KB |