Submission #1533289
Source Code Expand
#include<bits/stdc++.h> using namespace std; const int md=1e9+7; int n,c[100005],ans=1; int main() { scanf("%d",&n); for(int i=1,x;i<=n;i++) { scanf("%d",&x); c[x]++; } for(int i=(n&1)^1;i<n;i+=2) { if(c[i]!=2-(i==0)) { puts("0"); return 0; } ans=ans*c[i]%md; } printf("%d\n",ans); return 0; }
Submission Info
Submission Time | |
---|---|
Task | C - Lining Up |
User | xuyuan |
Language | C++14 (GCC 5.4.1) |
Score | 300 |
Code Size | 343 Byte |
Status | AC |
Exec Time | 11 ms |
Memory | 640 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:7:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ ./Main.cpp:10:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 300 / 300 | ||||
Status |
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Set Name | Test Cases |
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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 | 9 ms | 512 KB |
subtask_1_invalid_02.txt | AC | 3 ms | 256 KB |
subtask_1_max_01.txt | AC | 10 ms | 640 KB |
subtask_1_max_02.txt | AC | 10 ms | 640 KB |
subtask_1_max_valid_01.txt | AC | 11 ms | 640 KB |
subtask_1_max_valid_02.txt | AC | 11 ms | 640 KB |
subtask_1_min_valid_01.txt | AC | 1 ms | 256 KB |
subtask_1_rand_01.txt | AC | 7 ms | 512 KB |
subtask_1_rand_02.txt | AC | 10 ms | 640 KB |
subtask_1_valid_01.txt | AC | 6 ms | 512 KB |
subtask_1_valid_02.txt | AC | 3 ms | 384 KB |