CodeForces - 750B New Year and North Pole

 1 #include <iostream>
 2 #include <stdio.h>
 3 #include <string.h>
 4 using namespace std;
 5 
 6 int n;
 7 int main()
 8 {
 9     freopen("in.txt" ,"r", stdin);
10     scanf("%d", &n);
11     long long len;
12     char dir[32];
13     long long Loc = 20000;
14     bool fail = false;
15     while (n--)
16     {
17         memset(dir, 0, sizeof(dir));
18         scanf("%lld", &len);
19         scanf("%s", dir);
20         getchar();
21         if (strcmp("South", dir) && Loc == 20000)
22         {
23             fail = true;
24             break;
25         }
26         if (strcmp("North", dir) && Loc == 0)
27         {
28             fail = true;
29             break;
30         }
31         if (!strcmp(dir, "North"))
32         {
33             Loc += len;
34         }
35         if (!strcmp(dir, "South"))
36         {
37                 Loc -= len;
38         }
39         if (Loc > 20000 || Loc < 0)
40         {
41             fail = true;
42             break;
43         }
44     }
45     if (fail)
46     {
47         printf("NO\n");
48     }
49     else
50     {
51         if (Loc == 20000) printf("YES\n");
52         else printf("NO\n");
53     }
54     return 0;
55 }