結果

問題 No.1424 Ultrapalindrome
ユーザー tails
提出日時 2021-03-12 22:13:01
言語 C
(gcc 13.3.0)
結果
AC  
実行時間 7 ms / 2,000 ms
コード長 1,000 bytes
コンパイル時間 1,126 ms
コンパイル使用メモリ 32,604 KB
実行使用メモリ 9,348 KB
最終ジャッジ日時 2024-10-14 16:17:54
合計ジャッジ時間 1,849 ms
ジャッジサーバーID
(参考情報)
judge2 / judge5
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 3
other AC * 29
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.c:8:1: warning: data definition has no type or storage class
    8 | en[MAXN+1];
      | ^~
main.c:8:1: warning: type defaults to 'int' in declaration of 'en' [-Wimplicit-int]
main.c:9:1: warning: data definition has no type or storage class
    9 | ei[MAXN+1];
      | ^~
main.c:9:1: warning: type defaults to 'int' in declaration of 'ei' [-Wimplicit-int]
main.c:10:1: warning: data definition has no type or storage class
   10 | eb[MAXN<<1];
      | ^~
main.c:10:1: warning: type defaults to 'int' in declaration of 'eb' [-Wimplicit-int]
main.c:11:1: warning: data definition has no type or storage class
   11 | uv[MAXN<<1];
      | ^~
main.c:11:1: warning: type defaults to 'int' in declaration of 'uv' [-Wimplicit-int]
main.c:13:1: warning: data definition has no type or storage class
   13 | c[100000];
      | ^
main.c:13:1: warning: type defaults to 'int' in declaration of 'c' [-Wimplicit-int]
main.c:25:1: warning: return type defaults to 'int' [-Wimplicit-int]
   25 | main(){
      | ^~~~
main.c: In function 'main':
main.c:61:41: warning: implicit declaration of function 'write' [-Wimplicit-function-declaration]
   61 |                                         write(1,"No",2);
      |                                         ^~~~~
main.c:62:41: warning: implicit declaration of function '_exit'; did you mean '_Exit'? [-Wimplicit-function-declaration]
   62 |                                         _exit(0);
      |                                         ^~~~~
      |                                         _Exit

ソースコード

diff #
プレゼンテーションモードにする

#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")
char*mmap();
#define RD(v) int v=0;{int _c;while(_c=*rp++-48,_c>=0)v=v*10+_c;}
#define MAXN 200000
en[MAXN+1];
ei[MAXN+1];
eb[MAXN<<1];
uv[MAXN<<1];
c[100000];
void f(int i,int p,int d){
c[i]=d;
for(int k=0;k<en[i];++k){
int j=eb[ei[i]+k];
if(j!=p){
f(j,i,d+1);
}
}
}
main(){
char*rp=mmap(0l,1l<<28,1,2,0,0ll);
RD(n);
{
int ne=n-1<<1;
for(int j=0;j<ne;++j){
RD(t);
uv[j]=t;
++en[uv[j]];
}
}
{
int s=0;
for(int i=0;++i<=n;){
ei[i]=s;
s+=en[i];
en[i]=0;
}
}
{
int ne=n-1<<1;
for(int j=0;j<ne;++j){
int i=uv[j];
eb[ei[i]+en[i]++]=uv[j^1];
}
}
int r=1;
while(en[r]!=1)++r;
f(r,r,0);
int e=0;
for(int i=r+1;i<=n;++i){
if(en[i]==1){
if(e==0){
e=c[i];
}else{
if(c[i]!=e){
write(1,"No",2);
_exit(0);
}
}
}
}
for(int i=0;i<n;++i){
if(en[i]>2){
if(c[i]*2!=e){
write(1,"No",2);
_exit(0);
}
}
}
write(1,"Yes",3);
_exit(0);
}
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