View Compilation Error

0_0_7188936_31371.cpp:42: error: redefinition of `int f[20]'
0_0_7188936_31371.cpp:2: error: `int f[20]' previously declared here
0_0_7188936_31371.cpp:43: error: redefinition of `int ans'
0_0_7188936_31371.cpp:3: error: `int ans' previously declared here
0_0_7188936_31371.cpp: In function `void func(int)':
0_0_7188936_31371.cpp:44: error: redefinition of `void func(int)'
0_0_7188936_31371.cpp:4: error: `void func(int)' previously defined here
0_0_7188936_31371.cpp: In function `int main()':
0_0_7188936_31371.cpp:65: error: redefinition of `int main()'
0_0_7188936_31371.cpp:25: error: `int main()' previously defined here