day8 1 and 2 done + refactoring

include/useful_funcs.h

@@ -31,7 +31,7 @@ bool AreWeInBounds(int x, int y, std::vector<std::vector<char>> &TwoDCharVec) {
   return true;
 }
 
-int conditional_operation(int a, int b, char op) {
+int condop(int a, int b, char op) {
   switch (op) {
   case '+':
     return a + b;
@@ -48,8 +48,8 @@ int conditional_operation(int a, int b, char op) {
   }
 }
 
-unsigned long long conditional_operation_ull(unsigned long long a,
-                                             unsigned long long b, char op) {
+unsigned long long condop_ull(unsigned long long a, unsigned long long b,
+                              char op) {
   switch (op) {
   case '+':
     return a + b;