C :

#include<stdio.h>
int f(double d,double t)
{
	double sum=t/5.0*2.0+1;
	if(d>=10) sum=sum+10+14+3*(d-10);
	else if(d>=3) sum=sum+10+2*(d-3);
	else sum+=10;
	if(sum-(int)sum>=0.5) return (int)sum+1;
	else  return (int)sum;
}
int g(double d,double t)
{
	double sum=t*2.5/4;
	if(d>=10) sum=sum+11+2.5*7+3.75*(d-10);
	else if(d>=3) sum=sum+11+2.5*(d-3);
	else sum+=11;
	if(sum-(int)sum>=0.5) return (int)sum+1;
	else  return (int)sum;
}
int main()
{
    int d,t,n;
	scanf("%d",&n);
	while(n--)
	{
		scanf("%d%d",&d,&t);
		printf("%d\n",g((double)d,(double)t)-f((double)d,(double)t));
	}
    return 0;
}

C++ :

#include <stdio.h>

int main() {
	int T, d, t, x, y;
	double a, b;
	scanf("%d", &T);
	while (T--) {
		scanf("%d%d", &d, &t);
		a = 11;
		if (d - 3 > 0) {
			if (d - 10 > 0)
				a += 14 + 3 * (d - 10);
			else
				a += 2 * (d - 3);
		}
		a += t / 5.0 * 2;
		x = a + 0.5;
		b = 11;
		if (d - 3 > 0) {
			if (d - 10 > 0)
				b += 17.5 + 3.75 * (d - 10);
			else
				b += 2.5 * (d - 3);
		}
		b += t / 4.0 * 2.5;
		y = b + 0.5;
		printf("%d\n", y - x);
	}
	return 0;
}

Java :

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		
		Scanner in = new Scanner(System.in);
		int n = in.nextInt();
		for (int i = 0; i < n; i++) {
			int d = in.nextInt();
			int t = in.nextInt();
			System.out.println(after(d,t)-before(d, t));
			
		}
	
	}
	static int before(int d, int t) {
		
		int per;
		double sum=1;
		if (d<=3) {
			sum+=10;
		}else if (d<=10) {
			sum+=10;
			per = 2;
			int temp = d-3;
			sum+=(per*temp);
		}else if(d>10){
			per = 3;
			int temp = d-10;
			sum+=10;
			sum+=7*2;
			sum+=per*temp;
		}
		double wait = t*0.4;
		sum+=wait;
		return cast(sum);
		
	}
	static int after(int d, int t){
		
		double per;
		double sum=0;
		if (d<=3) {
			sum+=11;
		}else if (d<=10) {
			per = 2.5;
			int temp = d-3;
			sum+=11;
			sum+=per*temp;
		}else if(d>10){
			per = 3.75;
			int temp = d-10;
			sum+=11;
			sum+=7*2.5;
			sum+=per*temp;
		}
		double wait = t*2.5/4;
	
		
		sum+=wait;
		return cast(sum);
		
	}
	
	static int cast(double d){
		int id = (int) d;
		int res = (d-id)>=0.5?id+1:id;
		return res;
	}
}