View Compilation Error

763957_0_0_11612.cpp:3: error: expected `]' before ',' token
763957_0_0_11612.cpp: In function `int dfs(int)':
763957_0_0_11612.cpp:10: error: `mat' undeclared (first use this function)
763957_0_0_11612.cpp:10: error: (Each undeclared identifier is reported only once for each function it appears in.)
763957_0_0_11612.cpp: In function `int match()':
763957_0_0_11612.cpp:25: error: `sum' undeclared (first use this function)
763957_0_0_11612.cpp: In function `int main()':
763957_0_0_11612.cpp:32: error: `mat' undeclared (first use this function)