//{{{ #include using namespace std; #define rep(...) repN((__VA_ARGS__,rep3,rep2,loop,~))(__VA_ARGS__) #define loop(n) rep2(_loop_,n) #define rep2(i,n) rep3(i,0,n) #define rep3(i,begin,end) for(int i=(int)(begin),i##_end=(int)(end);i> N >> K; printf("%d\n", 50 * N + (int)(50 * N / (0.8 + 0.2 * K))); return 0; }