1) n*m 문자열 (띄어쓰기X) 입력 받기

	char arr[20][20];
	int n, m; //n*m
	cin >> n;
	cin >> m;
	//input()
	for (int i = 0; i < n; i++)
	{
		string s;
		cin >> s;
		for (int j = 0; j < m; j++)
		{	
			arr[i][j] = s[j];
		}
	}

 

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