uva10409.c

uva10409.c

#include <stdio.h>
#include <string.h>

int main() {
    int N;
    while (scanf("%d", &N)) {
        if (N == 0) break;
        
        int top = 1;
        int front = 2;
        int left = 3;
        
        while (N--) {
            char inp[10];
            scanf("%s", inp);
            
            if (inp[0] == 'n') {
                int new_top = 7 - front;
                int new_front = top;
                int new_left = left;
                
                top = new_top;
                front = new_front;
                left = new_left;
            }
            else if (inp[0] == 'e') {
                int new_top = left;
                int new_front = front;
                int new_left = 7 - top;
                
                top = new_top;
                front = new_front;
                left = new_left;
            }
            else if (inp[0] == 's') {
                int new_top = front;
                int new_front = 7 - top;
                int new_left = left;
                
                top = new_top;
                front = new_front;
                left = new_left;
            }
            else { /* inp[0] == 'w' */
                int new_top = 7 - left;
                int new_front = front;
                int new_left = top;
                
                top = new_top;
                front = new_front;
                left = new_left;                
            }
        }
        
        printf("%d\n", top);
    }
    return 0;
}