#include <stdio.h>

int main() {
    float a = 0;
    int b = 0, c = 0;
    while (scanf("%f", &a) != EOF) {
        b = (int)((a * 100000)) % 100000;
        c = a;
        if(b >= 50000) c+=1;
        printf("%d\n", c);


    }
    return 0;
}