Codeforces 69A Young Physicist Solution in C

1. #include<stdio.h>
2. int main()
3. {
4. int o,n,a,b,c,s,t,u;
5. s=0;
6. t=0;
7. u=0;
8. scanf("%d",&n);
9. for (o=0; o<n; o++)
10. {
11. scanf("%d %d %d",&a,&b,&c);
12. s=s+a;
13. t=t+b;
14. u=u+c;
15. }
16. if (s==0 && t==0 && u==0) printf("YES\n");
17. else printf("NO\n");
18. return 0;
19. }