#include <stdio.h>
#include <math.h>
 
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
 
int main() {
    double S, V;
    const double g = 9.8;
    double jarak_terjauh;
 
    printf("Masukkan sudut peluncuran (0-90 derajat): ");
    scanf("%lf", &S);
    printf("Masukkan kecepatan awal (m/s): ");
    scanf("%lf", &V);
 
    if (S < 0 || S > 90) {
        printf("Sudut harus antara 0 dan 90 derajat.\n");
        return 1;
    }
 
    double sudut_radian = S * (M_PI / 180.0);
    jarak_terjauh = (V * V * sin(2 * sudut_radian)) / g;
 
    printf("Jarak horizontal terjauh = %.2f meter\n", jarak_terjauh);
 
    return 0;
}
 

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