#includeusing namespace std;int main() {int t;scanf("%d",&t);int s;if(t<=3500) {s=t;} else if(t<=3500+1500-45) {s=(t-105)*100/97;} else if(t<=8000-45-300) {s=(t-455)*10/9;}else if(t<=3500+9000-45-300-900) {s=(t+345-1600)*10/8;}else if(t<=3500+35000-45-300-900-(35000-9000)*0.25) {s=(t-1880)*100/75;} else if(t<=3500+55000-45-300-900-6500-6000) {s=(t-3805)*10/7;} else if(t<=3500+80000-8750-6000-6500-900-300-45) {s=(t-6730)*100/65;} else {s=(t-15080)*100/55;}printf("%d",s);return 0;}