View Compilation Error

0_0_16926567_951.cpp:14:1: error: expected initializer before 'int'
 int operation[N][5];
 ^
0_0_16926567_951.cpp: In function 'int main()':
0_0_16926567_951.cpp:89:5: error: redefinition of 'int main()'
 int main() {
     ^
0_0_16926567_951.cpp:16:5: note: 'int main()' previously defined here
 int main() {
     ^