#include <stdio.h>

int main(){
  int n, dice, pos = 0;
  scanf("%d", &n);
  while(n--){
    scanf("%d", &dice);
    pos = (pos + dice) % 41;
    switch(pos){
      case 12:
        pos = 28;
        break;
      case 30:
        pos = 10;
        break;
      case 35:
        pos = 7;
        break;
      }
  }
  printf("%d\n", pos);
}