Algorithm
Problem Name: beecrowd | 1118
Problem Link: https://www.beecrowd.com.br/judge/en/problems/view/1118
Several Scores with Validation
By Neilor Tonin, URI 
Brazil
Write an program to read two scores of a student. Calculate and print the semester average. The program must accept only valid scores (a score must fit in the range [0.10]). Each score must be validated separately.
The program must print a message "novo calculo (1-sim 2-nao)" that means "new calculate (1-yes 2-no)". After, the input will be (1 or 2). 1 means a new calculation, 2 means that the execution must be finished.
Input
The input file contains several positive or negative floating-point (double) values. After the input of 2 valid scores, an integer number X will be read. Your program must stop when X = 2.
Output
If an invalid score is read, must be printed the message "nota invalida". When two valid scores are read, the message "media = " must be printed folowed by the average between these 2 scores. The message "novo calculo (1-sim 2-nao)" must be printed after reading X. This message should be displayed again if the standard input number for X is less than 1 or greater than 2, as example below.
The output average must be printed with 2 digits after the decimal point.
| Input Sample | Output Sample |
|
-3.5 |
nota invalida |
Code Examples
#1 Code Example with C++ Programming
Code -
C++ Programming
#include<bits/stdc++.h>
#define FIXED_FLOAT(x) std::fixed << std::setprecision(2) << (x)
using namespace std;
int main(){
int newNum;
while(1){
int cnt = 0;
float sum = 0;
while(cnt != 2){
float num;
cin >> num;
if (num >= 0 && num < = 10){
sum += num;
cnt += 1;
}
else{
cout << "nota invalida" << endl;
}
}
cout << "media = " << FIXED_FLOAT(sum / cnt) << endl;
while(1){
cout << "novo calculo (1-sim 2-nao)" << endl;
cin >> newNum;
if (newNum < 1 || newNum > 2){
continue;
}
else{
break;
}
}
if (newNum == 2){
break;
}
}
return 0;
}
Input
Output
#2 Code Example with Java Programming
Code -
Java Programming
import java.io.IOException;
import java.util.Scanner;
public class Main{
public static void main(String[] args) throws IOException{
Scanner input = new Scanner(System.in);
int newNum;
while(true){
int cnt = 0;
float sum = 0;
while(cnt != 2){
float num = input.nextFloat();
if (num >= 0 && num < = 10){
sum += num;
cnt += 1;
}
else{
System.out.println("nota invalida");
}
}
System.out.printf("media = %.2f\n", (sum / cnt));
while(true){
System.out.println("novo calculo (1-sim 2-nao)");
newNum = input.nextInt();
if (newNum < 1 || newNum > 2){
continue;
}
else{
break;
}
}
if (newNum == 2){
break;
}
}
}
}
Input
Output
#3 Code Example with Javascript Programming
Code -
Javascript Programming
var input = require('fs').readFileSync('/dev/stdin', 'utf8');
var lines = input.split('\n');
var newNum;
while(true){
var sum = 0;
var cnt = 0;
while(cnt != 2){
var num = parseFloat(lines.shift());
if (num >= 0 && num < = 10){
sum += num;
cnt += 1;
}
else{
console.log("nota invalida");
}
}
console.log("media =", (sum / cnt).toFixed(2));
while(true){
console.log("novo calculo (1-sim 2-nao)");
newNum = parseInt(lines.shift());
if (newNum < 1 || newNum > 2){
continue;
}
else{
break;
}
}
if (newNum == 2){
break;
}
}
Input
Output
#4 Code Example with Python Programming
Code -
Python Programming
while(True):
sum = 0
cnt = 0
while(cnt != 2):
num = float(input())
if (num >= 0 and num <= 10):
sum += num
cnt += 1
else:
print("nota invalida")
print("media = {:.2f}".format(sum / cnt))
newNum = 0
while(True):
print("novo calculo (1-sim 2-nao)")
newNum = int(input())
if (newNum == 1 or newNum == 2):
break
if (newNum == 2):
break
Input
Output