View Compilation Error

688059_0_0_26048.cpp:11: error: size of array `mat' is too large
688059_0_0_26048.cpp: In function `int search()':
688059_0_0_26048.cpp:42: error: `mat' undeclared (first use this function)
688059_0_0_26048.cpp:42: error: (Each undeclared identifier is reported only once for each function it appears in.)
688059_0_0_26048.cpp: In function `int main()':
688059_0_0_26048.cpp:61: error: `mat' undeclared (first use this function)