Submission #2238818
Source Code Expand
#include <stdio.h> #define R register #define ll long long inline int read(){ R int x; R bool f; R char c; for (f=0; (c=getchar())<'0'||c>'9'; f=c=='-'); for (x=c^'0'; (c=getchar())>='0'&&c<='9'; x=(x<<3)+(x<<1)+(c^'0')); return f?-x:x; } #define MN 105 int a[MN],cnt[MN],ma,n;bool flag=1; int main(){ n=read(); for (R int i=1; i<=n; ++i) ++cnt[a[i]=read()],a[i]>ma?ma=a[i]:0; ++ma;if (ma&1){ if (cnt[ma>>1]!=1) return puts("Impossible"),0; for (R int i=ma+1>>1; i<ma; ++i) if (cnt[i]<2) return puts("Impossible"),0; }else{ if (cnt[ma>>1]!=2) return puts("Impossible"),0; for (R int i=ma>>1; i<ma; ++i) if (cnt[i]<2) return puts("Impossible"),0; }for (R int i=ma>>1; --i; ) if (cnt[i]) return puts("Impossible"),0; puts("Possible");return 0; }
Submission Info
Submission Time | |
---|---|
Task | C - Tree Restoring |
User | vjudge1 |
Language | C++14 (GCC 5.4.1) |
Score | 700 |
Code Size | 767 Byte |
Status | AC |
Exec Time | 2 ms |
Memory | 128 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 700 / 700 | ||||
Status |
|
|
Set Name | Test Cases |
---|---|
Sample | example0, example1, example2, example3, example4, example5 |
All | almostline0, almostline1, almostline2, almostline3, can0, can1, can2, can3, can4, can5, can6, deg0, deg1, deg2, deg3, example0, example1, example2, example3, example4, example5, handmade0, line0, line1, line2, line3, ng10, ng11, ng12, ng13, ng20, ng21, ng22, ng23, plus0, plus1, plus2, plus3, rand0, rand1, rand2, star0, star1, star2, star3 |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
almostline0 | AC | 0 ms | 128 KB |
almostline1 | AC | 0 ms | 128 KB |
almostline2 | AC | 0 ms | 128 KB |
almostline3 | AC | 0 ms | 128 KB |
can0 | AC | 0 ms | 128 KB |
can1 | AC | 0 ms | 128 KB |
can2 | AC | 0 ms | 128 KB |
can3 | AC | 0 ms | 128 KB |
can4 | AC | 0 ms | 128 KB |
can5 | AC | 0 ms | 128 KB |
can6 | AC | 0 ms | 128 KB |
deg0 | AC | 0 ms | 128 KB |
deg1 | AC | 0 ms | 128 KB |
deg2 | AC | 0 ms | 128 KB |
deg3 | AC | 0 ms | 128 KB |
example0 | AC | 0 ms | 128 KB |
example1 | AC | 0 ms | 128 KB |
example2 | AC | 0 ms | 128 KB |
example3 | AC | 1 ms | 128 KB |
example4 | AC | 0 ms | 128 KB |
example5 | AC | 0 ms | 128 KB |
handmade0 | AC | 0 ms | 128 KB |
line0 | AC | 0 ms | 128 KB |
line1 | AC | 0 ms | 128 KB |
line2 | AC | 0 ms | 128 KB |
line3 | AC | 0 ms | 128 KB |
ng10 | AC | 2 ms | 128 KB |
ng11 | AC | 0 ms | 128 KB |
ng12 | AC | 0 ms | 128 KB |
ng13 | AC | 0 ms | 128 KB |
ng20 | AC | 0 ms | 128 KB |
ng21 | AC | 0 ms | 128 KB |
ng22 | AC | 0 ms | 128 KB |
ng23 | AC | 0 ms | 128 KB |
plus0 | AC | 0 ms | 128 KB |
plus1 | AC | 0 ms | 128 KB |
plus2 | AC | 0 ms | 128 KB |
plus3 | AC | 0 ms | 128 KB |
rand0 | AC | 0 ms | 128 KB |
rand1 | AC | 0 ms | 128 KB |
rand2 | AC | 0 ms | 128 KB |
star0 | AC | 0 ms | 128 KB |
star1 | AC | 0 ms | 128 KB |
star2 | AC | 0 ms | 128 KB |
star3 | AC | 0 ms | 128 KB |