View Compilation Error

0_0_7809546_277.cpp: In function `int main()':
0_0_7809546_277.cpp:9: error: `memset' undeclared (first use this function)
0_0_7809546_277.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7809546_277.cpp:13: error: invalid conversion from `int*' to `int'
0_0_7809546_277.cpp:23: error: invalid types `int[1000001][int[1000001]]' for array subscript
0_0_7809546_277.cpp:26: error: `system' undeclared (first use this function)