//

1 #include "iostream" 2 #include "cstdio" 3 #include "cstring" 4 #include "algorithm" 5 using namespace std; 6 const __int64 N = 1e6; 7 double a, d; 8 int n; 9 10 int main()11 {12     int i;13     scanf("%lf%lf%d", &a, &d, &n);14     __int64 sum = 0;15     __int64 DN = d * N + 0.5, AN = a * N + 0.5;16     for(i = 1; i <= n; ++i) {17         sum += DN;18         sum %= (AN << 2);19         if(sum >= 3 * AN)20             printf("0 %f\n", (double)((AN << 2) - sum) / N);21         else if(sum >= (AN << 1))22             printf("%lf %lf\n", (double)(3 * AN - sum) / N, (double)AN / N);23         else if(sum >= AN)24             printf("%lf %lf\n", (double)AN / N, (double)(sum - AN) / N);25         else26             printf("%lf 0\n", (double)sum / N);27     }28 }