1a.c (493B)
1 #include <stdio.h> 2 #include <stdlib.h> 3 4 #define ABS(n) ((n < 0) ? -n : n) 5 6 int 7 rotate(int pos, int dis) { 8 int dir = (dis < 0) ? -1 : 1; 9 10 for (int i = 0; i < ABS(dis); i++) { 11 pos += dir; 12 if (pos > 99) pos = 0; 13 if (pos < 0) pos = 99; 14 } 15 return pos; 16 } 17 18 int 19 main() { 20 char line[20]; 21 int pos = 50, off = 0, zeros = 0; 22 23 while (fgets(line, 20, stdin)) { 24 off = atoi(line + 1) * ((line[0] == 'L') ? -1 : 1); 25 pos = rotate(pos, off); 26 if (pos == 0) zeros++; 27 28 } 29 30 printf("%d\n", zeros); 31 }