[summer daily question] Luogu P7550 [coci2020-2021 6] bold

Topic link ：P7550 [COCI2020-2021#6] Bold - Luogu | New ecology of computer science education (luogu.com.cn)

Title Description

Paula to Daniel Wrote a letter , She needs bold text , So that the eyesight deteriorates Daniel read .

The letter can be used .  and #  The matrix representation . For all the original letters #,Paula You need to expand it to the right and down to 2 × 2  Of #.

Input format

The first line has two integers n, m, Indicates the size of the letter .

Next n  That's ok , Every time m  Characters , Indicates the content of the letter .

Make sure there is no #.

Output format

n  That's ok , Each row m  Characters , Indicates a bold letter .

Examples #1

The sample input #1

4 4
....
.#..
....
....

Sample output #1

....
.##.
.##.
....

Examples #2

The sample input #2

7 7
.......
.####..
.#...#.
.#...#.
.#...#.
.####..
.......

Sample output #2

.......
.#####.
.######
.##..##
.##..##
.######
.#####.

Examples #3

The sample input #3

9 7
.......
.####..
.#...#.
.#...#.
.####..
.#.....
.#.....
.#.....
.......

Sample output #3

.......
.#####.
.######
.##..##
.######
.#####.
.##....
.##....
.##....

Tips

Data scale and agreement

about 100%  The data of ,2 <= n, m <= 10^3. The guarantee letter only contains .  and #.

explain

The score of this question is according to COCI Original question setting , Full marks 50.

The title is translated from  COCI2020-2021 CONTEST #6 T1 Bold.

AC code:

#include<iostream>
#include<algorithm>

using namespace std;

const int n = 1e3 + 10;
const int m = 1e3 + 10;
char c[n][m];

int main()
{
	vector<pair<int,int>> p;
	
	int a,b;
	cin>>a>>b;
	for(int i=0;i<a;i++)
		for(int j=0;j<b;j++)
		{
			cin>>c[i][j];
			if(c[i][j]=='#')
				p.push_back({i,j});
		}
	
	for(auto i:p)
	{
		c[i.first][i.second]='#';
		c[i.first+1][i.second]='#';
		c[i.first][i.second+1]='#';
		c[i.first+1][i.second+1]='#';
	}
	
	for(int i=0;i<a;i++,cout<<endl)
		for(int j=0;j<b;j++)
		{
			cout<<c[i][j];
		}
	
	
	return 0;
}