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0_0_9441722_6793.cpp:1:24: bits/stdc++.h: No such file or directory
0_0_9441722_6793.cpp: In member function `matrix matrix::identity()':
0_0_9441722_6793.cpp:15: error: `memset' undeclared (first use this function)
0_0_9441722_6793.cpp:15: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9441722_6793.cpp: In function `int main()':
0_0_9441722_6793.cpp:56: error: `scanf' undeclared (first use this function)
0_0_9441722_6793.cpp:61: error: `printf' undeclared (first use this function)