ACM 10409 - Die Game

#include <stdio.h>

struct Dice
{
    int up, down, north, east, south, west;
};
struct Dice d;

int main()
{
    int n, i;
    char str[10];
    while (scanf("%d", &n) == 1 && n)
    {
        d.up = 1, d.down = 6, d.north = 2,
        d.east = 4, d.south = 5, d.west = 3;
        
        while (n --)
        {
            scanf("%s", str);  
            if (str[0] == 's') /* 南 */
                d.south = d.up, d.up = d.north, 
                d.down = 7 - d.up, d.north = 7 - d.south;
            if (str[0] == 'n') /* 北 */
                d.down = d.north, d.north = d.up,
                d.up = 7 - d.down, d.south = 7 - d.north;
            if (str[0] == 'w')
                d.down = d.west, d.west = d.up,
                d.up = 7 - d.down, d.east = 7 - d.west;
            if (str[0] == 'e')
                d.east = d.up, d.up = d.west,
                d.down = 7 - d.up, d.west = 7 - d.east;
        }
        printf("%d\n", d.up);
    }
    
    return 0;
}

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