#821961 (C90) No.2142 Segment Zero

• 問題: No.2142 Segment Zero
• ユーザー: tails
• 提出日時: 2022-12-02 23:19:12
• 言語: C90 (gcc 11.4.0)
• 結果: AC
• 実行時間: 2 ms / 2,000 ms
• コード長: 400 bytes
• コンパイル時間: 1,439 ms
• コンパイル使用メモリ: 22,912 KB
• 実行使用メモリ: 6,944 KB
• 最終ジャッジ日時: 2024-04-18 08:35:08
• 合計ジャッジ時間: 1,732 ms
• ジャッジサーバーID （参考情報）: judge5 / judge4

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	0 ms; 6,816 KB
testcase_01	AC	2 ms; 6,812 KB
testcase_02	AC	0 ms; 6,812 KB
testcase_03	AC	0 ms; 6,940 KB
testcase_04	AC	2 ms; 6,944 KB
testcase_05	AC	2 ms; 6,940 KB
testcase_06	AC	0 ms; 6,944 KB
testcase_07	AC	1 ms; 6,944 KB
testcase_08	AC	2 ms; 6,940 KB
testcase_09	AC	2 ms; 6,944 KB
testcase_10	AC	2 ms; 6,944 KB
testcase_11	AC	2 ms; 6,940 KB
testcase_12	AC	2 ms; 6,940 KB
testcase_13	AC	2 ms; 6,940 KB
testcase_14	AC	2 ms; 6,940 KB
testcase_15	AC	2 ms; 6,944 KB
testcase_16	AC	2 ms; 6,940 KB
testcase_17	AC	1 ms; 6,940 KB
testcase_18	AC	1 ms; 6,944 KB
testcase_19	AC	1 ms; 6,940 KB
testcase_20	AC	1 ms; 6,940 KB
testcase_21	AC	1 ms; 6,944 KB
testcase_22	AC	2 ms; 6,944 KB
testcase_23	AC	1 ms; 6,940 KB
testcase_24	AC	1 ms; 6,940 KB
testcase_25	AC	1 ms; 6,940 KB
testcase_26	AC	2 ms; 6,940 KB
testcase_27	AC	1 ms; 6,944 KB
testcase_28	AC	1 ms; 6,944 KB
testcase_29	AC	1 ms; 6,944 KB
testcase_30	AC	2 ms; 6,940 KB
testcase_31	AC	1 ms; 6,940 KB
testcase_32	AC	1 ms; 6,940 KB
testcase_33	AC	1 ms; 6,940 KB
testcase_34	AC	1 ms; 6,944 KB
testcase_35	AC	1 ms; 6,940 KB
testcase_36	AC	1 ms; 6,940 KB

コンパイルメッセージ

main.c:6:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
    6 | main(){
      | ^~~~
main.c: In function ‘main’:
main.c:10:17: warning: implicit declaration of function ‘read’; did you mean ‘rd’? [-Wimplicit-function-declaration]
   10 |                 read(0,rbuf,sizeof rbuf);
      |                 ^~~~
      |                 rd
main.c:22:25: warning: implicit declaration of function ‘write’ [-Wimplicit-function-declaration]
   22 |                         write(1,"1",1);
      |                         ^~~~~
main.c:23:25: warning: implicit declaration of function ‘_exit’ [-Wimplicit-function-declaration]
   23 |                         _exit(0);
      |                         ^~~~~
main.c:23:25: warning: incompatible implicit declaration of built-in function ‘_exit’ [-Wbuiltin-declaration-mismatch]
main.c:28:9: warning: incompatible implicit declaration of built-in function ‘_exit’ [-Wbuiltin-declaration-mismatch]
   28 |         _exit(0);
      |         ^~~~~

ソースコード

#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

#define rd() ({long _v=0,_c;while(_c=*rp++-48,_c>=0)_v=_v*10+_c;_v;})

main(){
	long n,k;
	{
		char rbuf[64];
		read(0,rbuf,sizeof rbuf);
		char*rp=rbuf;
		n=rd();
		k=rd();
	}
	k=n*(n+1)/2-k;
	long l=0,r=0;
	while(r<=n){
		while(k<0){
			k+=++l;
		}
		if(k==0){
			write(1,"1",1);
			_exit(0);
		}
		k-=++r;
	}
	write(1,"2",1);
	_exit(0);
}