Submission #1516904
Source Code Expand
#include <bits/stdc++.h> using namespace std; #define F first #define S second #define mp make_pair #define pb push_back #define int long long #define ieps 5*30000 #define eps (int) 1e9 #define pii pair<int,int> #define endl '\n' int32_t main(){ int n; cin>>n; set<int> v; for(int i = 1;i<=n;i++){ v.insert(abs((i - 1) - (n - (i - 1) - 1))); } map<int,int> c; for(int i = 0;i<n;i++){ int x; cin>>x; c[x]++; } int q = 1LL; int mod = 1000000007; for(auto p : v){ if(p == 0LL){ if(n%2){ if(c[p] == 1) continue; else q*=0LL; } else{ q*=0LL; } continue; } if(c[p] != 2) q*=0; else q*=2, q%=mod; } cout<<q%mod<<endl; }
Submission Info
Submission Time | |
---|---|
Task | C - Lining Up |
User | yyjhzx |
Language | C++14 (GCC 5.4.1) |
Score | 300 |
Code Size | 716 Byte |
Status | AC |
Exec Time | 76 ms |
Memory | 7680 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 300 / 300 | ||||
Status |
|
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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 | 58 ms | 4864 KB |
subtask_1_invalid_02.txt | AC | 11 ms | 1152 KB |
subtask_1_max_01.txt | AC | 76 ms | 7680 KB |
subtask_1_max_02.txt | AC | 76 ms | 7680 KB |
subtask_1_max_valid_01.txt | AC | 71 ms | 5760 KB |
subtask_1_max_valid_02.txt | AC | 71 ms | 5760 KB |
subtask_1_min_valid_01.txt | AC | 1 ms | 256 KB |
subtask_1_rand_01.txt | AC | 43 ms | 4736 KB |
subtask_1_rand_02.txt | AC | 68 ms | 7168 KB |
subtask_1_valid_01.txt | AC | 36 ms | 3200 KB |
subtask_1_valid_02.txt | AC | 13 ms | 1408 KB |