Submission #3688649
Source Code Expand
#include<iostream> #include<cstdio> #include<cstdlib> #include<cstring> #include<string> #include<algorithm> #include<math.h> using namespace std; const int N=3e5+5; int n,s[N]; long long ans; void init() { int i; scanf("%d",&n); for(i=1;i<=2*n;++i) scanf("%d",&s[i]); sort(s+1,s+2*n+1); } void work() { int i; for(i=1;i<=2*n;++i) ans+=1LL*(i-1)*s[i]; printf("%.12lf\n",1.0*ans/(2*n-1)); } int main() { init(); work(); return 0; }
Submission Info
Submission Time | |
---|---|
Task | J - Indifferent |
User | luogu_bot3 |
Language | C++ (GCC 5.4.1) |
Score | 100 |
Code Size | 477 Byte |
Status | AC |
Exec Time | 34 ms |
Memory | 1024 KB |
Compile Error
./Main.cpp: In function ‘void init()’: ./Main.cpp:17:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ ./Main.cpp:18:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=2*n;++i) scanf("%d",&s[i]); ^
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 100 / 100 | ||||
Status |
|
|
Set Name | Test Cases |
---|---|
Sample | a01, a02 |
All | a01, a02, b03, b04, b05, b06, b07, b08, b09, b10, b11, b12, b13, b14, b15, b16, b17, b18, b19, b20, b21, b22, b23, b24, b25, b26, b27, b28, b29, b30, b31, b32, b33, b34, b35, b36, b37, b38, b39, b40, b41, b42, b43 |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
a01 | AC | 1 ms | 256 KB |
a02 | AC | 1 ms | 256 KB |
b03 | AC | 1 ms | 256 KB |
b04 | AC | 1 ms | 256 KB |
b05 | AC | 23 ms | 1024 KB |
b06 | AC | 34 ms | 1024 KB |
b07 | AC | 1 ms | 256 KB |
b08 | AC | 1 ms | 256 KB |
b09 | AC | 1 ms | 256 KB |
b10 | AC | 1 ms | 256 KB |
b11 | AC | 1 ms | 256 KB |
b12 | AC | 1 ms | 256 KB |
b13 | AC | 1 ms | 256 KB |
b14 | AC | 1 ms | 256 KB |
b15 | AC | 1 ms | 256 KB |
b16 | AC | 1 ms | 256 KB |
b17 | AC | 1 ms | 256 KB |
b18 | AC | 1 ms | 256 KB |
b19 | AC | 1 ms | 256 KB |
b20 | AC | 1 ms | 256 KB |
b21 | AC | 1 ms | 256 KB |
b22 | AC | 1 ms | 256 KB |
b23 | AC | 2 ms | 256 KB |
b24 | AC | 2 ms | 256 KB |
b25 | AC | 2 ms | 256 KB |
b26 | AC | 2 ms | 256 KB |
b27 | AC | 4 ms | 256 KB |
b28 | AC | 6 ms | 384 KB |
b29 | AC | 7 ms | 384 KB |
b30 | AC | 9 ms | 512 KB |
b31 | AC | 19 ms | 640 KB |
b32 | AC | 27 ms | 896 KB |
b33 | AC | 34 ms | 1024 KB |
b34 | AC | 34 ms | 1024 KB |
b35 | AC | 34 ms | 1024 KB |
b36 | AC | 34 ms | 1024 KB |
b37 | AC | 34 ms | 1024 KB |
b38 | AC | 34 ms | 1024 KB |
b39 | AC | 34 ms | 1024 KB |
b40 | AC | 34 ms | 1024 KB |
b41 | AC | 34 ms | 1024 KB |
b42 | AC | 34 ms | 1024 KB |
b43 | AC | 34 ms | 1024 KB |