#include <stdio.h>

int main() {
    int a, b, s;
    scanf("%d", &s);
    int sum = 0;
    if (s <= 100000) sum = s * 0.1;
    if (s >= 100000 && s <= 200000) {
        sum = 100000 * 0.1 + (s-100000) * 0.075;
    }
    if (s > 200000 && s <= 400000) {
        sum = 100000 * 0.1 + 100000 * 0.075 + (s-200000) * 0.05;
    }
    if (s > 400000 && s <= 600000) {
        sum = 100000 * 0.1 + 100000 * 0.075 + 200000 * 0.05 +(s-400000) * 0.03;
    }
    if (s > 600000 && s <= 1000000) {
        sum = 100000 * 0.1 + 100000 * 0.075 + 200000 * 0.05 +400000 * 0.03 + (s-600000)*0.015;
    }
    if (s > 1000000) {
        sum = 100000 * 0.1 + 100000 * 0.075 + 200000 * 0.05 +400000 * 0.03 + 600000*0.015;
        sum += (s-1000000)*0.01;
    }
    printf("%d\n", sum);
    return 0;
}