Codeforces Round 886 (Div. 4) 全题题解

我关注的人中正式参与比赛排名公示：

#	Who	=	Penalty	*	A	B	C	D	E	F	G	H
1 (980)	Chen_Jinhui	7	381		\(\color{#00CC00}{\textbf{+}}\) 00:05	\(\color{#00CC00}{\textbf{+1}}\) 00:17	\(\color{#00CC00}{\textbf{+}}\) 00:19	\(\color{#00CC00}{\textbf{+}}\) 01:08	\(\color{#00CC00}{\textbf{+}}\) 00:55	\(\color{#00CC00}{\textbf{+}}\) 01:35	\(\color{#00CC00}{\textbf{+}}\) 01:52
2 (4685)	LQ1120241921	5	160		\(\color{#00CC00}{\textbf{+}}\) 00:04	\(\color{#00CC00}{\textbf{+}}\) 00:10	\(\color{#00CC00}{\textbf{+}}\) 00:18	\(\color{#00CC00}{\textbf{+}}\) 01:13	\(\color{#140c34}-2\)	\(\color{#00CC00}{\textbf{+}}\) 00:55
3 (5657)	zdrj2025	5	199		\(\color{#00CC00}{\textbf{+}}\) 00:05	\(\color{#00CC00}{\textbf{+}}\) 00:14	\(\color{#00CC00}{\textbf{+}}\) 00:32	\(\color{#00CC00}{\textbf{+}}\) 00:53	\(\color{#00CC00}{\textbf{+1}}\) 01:25
4 (6367)	linzibolzb	5	253		\(\color{#00CC00}{\textbf{+}}\) 00:06	\(\color{#00CC00}{\textbf{+}}\) 00:16	\(\color{#00CC00}{\textbf{+}}\) 00:26	\(\color{#00CC00}{\textbf{+2}}\) 01:00	\(\color{#00CC00}{\textbf{+2}}\) 01:45	\(\color{#140c34}-1\)	\(\color{#140c34}-1\)
5 (7679)	wy2025	4	62		\(\color{#00CC00}{\textbf{+}}\) 00:06	\(\color{#00CC00}{\textbf{+}}\) 00:11	\(\color{#00CC00}{\textbf{+}}\) 00:18	\(\color{#00CC00}{\textbf{+}}\) 00:27
6 (9024)	s_zeratu	4	92		\(\color{#00CC00}{\textbf{+}}\) 00:05	\(\color{#00CC00}{\textbf{+}}\) 00:18	\(\color{#00CC00}{\textbf{+}}\) 00:23	\(\color{#00CC00}{\textbf{+}}\) 00:46
7 (9186)	DCZISSB	4	96		\(\color{#00CC00}{\textbf{+}}\) 00:04	\(\color{#00CC00}{\textbf{+}}\) 00:11	\(\color{#00CC00}{\textbf{+}}\) 00:20	\(\color{#00CC00}{\textbf{+1}}\) 00:51		\(\color{#140c34}-2\)
8 (9484)	c20251917	4	103		\(\color{#00CC00}{\textbf{+}}\) 00:05	\(\color{#00CC00}{\textbf{+}}\) 00:21	\(\color{#00CC00}{\textbf{+}}\) 00:23	\(\color{#00CC00}{\textbf{+}}\) 00:54
9 (9529)	Ariasaka	4	104		\(\color{#00CC00}{\textbf{+}}\) 00:02	\(\color{#00CC00}{\textbf{+}}\) 00:08	\(\color{#00CC00}{\textbf{+}}\) 00:16	\(\color{#00CC00}{\textbf{+}}\) 01:18	\(\color{#140c34}-7\)
10 (11019)	Li_Feiy-i7i	4	141	\(\small\color{gray}{-2}\)	\(\color{#00CC00}{\textbf{+}}\) 00:08	\(\color{#00CC00}{\textbf{+}}\) 00:25	\(\color{#00CC00}{\textbf{+}}\) 00:28	\(\color{#00CC00}{\textbf{+1}}\) 01:10				\(\color{#140c34}-2\)
11 (11710)	cyh1105	4	163		\(\color{#00CC00}{\textbf{+}}\) 00:04	\(\color{#00CC00}{\textbf{+}}\) 00:15	\(\color{#00CC00}{\textbf{+}}\) 01:01	\(\color{#00CC00}{\textbf{+}}\) 01:23
12 (11952)	dhaomin	4	172		\(\color{#00CC00}{\textbf{+}}\) 00:03	\(\color{#00CC00}{\textbf{+}}\) 00:36	\(\color{#00CC00}{\textbf{+}}\) 00:35	\(\color{#00CC00}{\textbf{+3}}\) 01:08
13 (14718)	czyawa	3	57		\(\color{#00CC00}{\textbf{+}}\) 00:07	\(\color{#00CC00}{\textbf{+}}\) 00:21	\(\color{#00CC00}{\textbf{+}}\) 00:29
14 (18562)	z_m_x	3	210		\(\color{#00CC00}{\textbf{+}}\) 01:45	\(\color{#00CC00}{\textbf{+}}\) 01:08	\(\color{#00CC00}{\textbf{+}}\) 00:37
15 (21815)	iamchenzh	1	16		\(\color{#00CC00}{\textbf{+}}\) 00:16	\(\color{#140c34}-6\)
16 (21948)	0930_songzhiyu	1	20		\(\color{#00CC00}{\textbf{+}}\) 00:20	\(\color{#140c34}-3\)
	Accepted Tried				\(\color{#00CC00}{\text 23198}\) 23269	\(\color{#00CC00}{\text 20370}\) 21272	\(\color{#00CC00}{\text 19959}\) 19987	\(\color{#00CC00}{\text 13233}\) 14229	\(\color{#00CC00}{\text 6535}\) 7658	\(\color{#00CC00}{\text 3335}\) 6428	\(\color{#00CC00}{\text 1330}\) 2226	\(\color{#00CC00}{\text 386}\) 876

题解部分

A - To My Critics

AI 会做的题你不会做？可以退役了。

直接贴代码，不予解释。

//the code is from chenjh
#include<cstdio>
void solve(){
	int a,b,c;scanf("%d%d%d",&a,&b,&c);
	puts(a+b>=10||a+c>=10||b+c>=10?"YES":"NO"); 
}
int main(){
	int T;scanf("%d",&T);
	while(T--) solve(); 
	return 0;
}

B - Ten Words of Wisdom

详细请见 题解 CF1850B Ten Words of Wisdom。

C - Word on the Paper

详细请见 题解 CF1850C Word on the Paper。

D - Balanced Round

详细请见 题解 CF1850D Balanced Round。

E - Cardboard for Pictures

详细请见 题解 CF1850E Cardboard for Pictures。

F - We Were Both Children

详细请见 题解 CF1850F We Were Both Children。

G - The Morning Star

详细请见 题解 CF1850G The Morning Star。

H - The Third Letter

详细请见 Tutorial (en)。