Submission #1709691
Source Code Expand
#include<cstdio> #define N 110000 inline char gc(){ static char now[1<<16],*T,*S; if (T==S){T=(S=now)+fread(now,1,1<<16,stdin);if (T==S) return EOF;} return *S++; } inline int read(){ int x=0;char ch=gc(); while (ch<'0'||ch>'9') ch=gc(); while (ch<='9'&&ch>='0'){x=x*10+ch-'0';ch=gc();} return x; } int n,a[N],differ[N]; int main(){ //freopen("box.in","r",stdin); n=read();long long sum=0;long long sum1=0; if (n==1){printf("YES");return 0;} sum1=(long long)n*(n+1)>>1; for (int i=1;i<=n;++i) a[i]=read(),sum+=a[i];a[n+1]=a[1]; for (int i=1;i<=n;++i) differ[i]=a[i+1]-a[i];int k=sum/sum1; if (sum%sum1){printf("NO");return 0;} for (int i=1;i<=n;++i){ double x=(differ[i]-k)/(-1.0*n); if (x<0){printf("NO");return 0;} int xx=x;if (xx!=x){printf("NO");return 0;} } printf("YES"); return 0; }
Submission Info
Submission Time | |
---|---|
Task | B - Boxes |
User | vjudge2 |
Language | C++14 (GCC 5.4.1) |
Score | 500 |
Code Size | 813 Byte |
Status | AC |
Exec Time | 3 ms |
Memory | 1024 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 500 / 500 | ||||
Status |
|
|
Set Name | Test Cases |
---|---|
Sample | sample1.txt, sample2.txt, sample3.txt |
All | sample1.txt, sample2.txt, sample3.txt, in1.txt, in10.txt, in11.txt, in12.txt, in13.txt, in14.txt, in15.txt, in16.txt, in17.txt, in18.txt, in19.txt, in2.txt, in20.txt, in21.txt, in22.txt, in23.txt, in24.txt, in25.txt, in26.txt, in27.txt, in3.txt, in4.txt, in5.txt, in6.txt, in7.txt, in8.txt, in9.txt, sample1.txt, sample2.txt, sample3.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
in1.txt | AC | 2 ms | 1024 KB |
in10.txt | AC | 1 ms | 256 KB |
in11.txt | AC | 3 ms | 1024 KB |
in12.txt | AC | 3 ms | 1024 KB |
in13.txt | AC | 2 ms | 896 KB |
in14.txt | AC | 1 ms | 128 KB |
in15.txt | AC | 1 ms | 128 KB |
in16.txt | AC | 1 ms | 128 KB |
in17.txt | AC | 1 ms | 128 KB |
in18.txt | AC | 1 ms | 128 KB |
in19.txt | AC | 1 ms | 128 KB |
in2.txt | AC | 3 ms | 1024 KB |
in20.txt | AC | 1 ms | 128 KB |
in21.txt | AC | 3 ms | 1024 KB |
in22.txt | AC | 3 ms | 1024 KB |
in23.txt | AC | 3 ms | 1024 KB |
in24.txt | AC | 1 ms | 256 KB |
in25.txt | AC | 1 ms | 256 KB |
in26.txt | AC | 3 ms | 1024 KB |
in27.txt | AC | 3 ms | 1024 KB |
in3.txt | AC | 3 ms | 1024 KB |
in4.txt | AC | 3 ms | 1024 KB |
in5.txt | AC | 3 ms | 1024 KB |
in6.txt | AC | 3 ms | 1024 KB |
in7.txt | AC | 3 ms | 1024 KB |
in8.txt | AC | 1 ms | 256 KB |
in9.txt | AC | 1 ms | 256 KB |
sample1.txt | AC | 1 ms | 128 KB |
sample2.txt | AC | 1 ms | 128 KB |
sample3.txt | AC | 1 ms | 128 KB |