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#include <iostream>
#include <string>
using namespace std;
 
int main() {
	// your code goes here
	int count=0;
	int input[25][25];
	bool flag[25][25]={false};
 
	cin >> count;
	cin.ignore();
 
	for(int i=0;i<count;i++)
	{
		for(int j=0;j<count;j++)
		{
			string temp;
			cin>>temp;
			if(temp.compare('0')) input[i][j] = 0;
			else input[i][j] = 1;
		}
		cin.ignore();
	}
 
	for(int i=0;i<count;i++)
	{
		for(int j=0;j<count;j++)
		{
			//if(!flag[i][j])
				cout << input[i][j];
		}
		cout << "" << endl;
	}
 
 
	return 0;
}

prog.cpp: In function ‘int main()’:
prog.cpp:20:23: error: invalid conversion from ‘char’ to ‘const char*’ [-fpermissive]
    if(temp.compare('0')) input[i][j] = 0;
                       ^
In file included from /usr/include/c++/6/string:52:0,
                 from /usr/include/c++/6/bits/locale_classes.h:40,
                 from /usr/include/c++/6/bits/ios_base.h:41,
                 from /usr/include/c++/6/ios:42,
                 from /usr/include/c++/6/ostream:38,
                 from /usr/include/c++/6/iostream:39,
                 from prog.cpp:1:
/usr/include/c++/6/bits/basic_string.h:2493:7: note:   initializing argument 1 of ‘int std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::compare(const _CharT*) const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]’
       compare(const _CharT* __s) const;
       ^~~~~~~

Standard output is empty