สนุกกับตัวเลข (numbers)

Author: Pakin Olanraktham & Black Cat

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View Problem Statement

Source: PROGRAMMING.IN.TH

Difficulty: ?

Prerequisites:

• การเขียนโปรแกรมเบื้องต้น

เฉลย

CC++

#include <stdio.h>

int main() {
    int n;
    scanf("%d", &n);

    int a[n];
    for (int i = 0; i < n; i++) scanf("%d", &a[i]);

    for(int i=0; i<n-1; i++)
        for(int j=i+1; j<n; j++)
            if(a[i]>a[j]) {int temp=a[i]; a[i]=a[j], a[j]=temp;}

    int alr=0;

    for(int i=0; i<n; i++){
        if(!alr&&a[i]) printf("%d", a[i]), a[i]=0, i=0, alr=1;
        else if(alr) printf("%d",a[i]);
    }                
}

#include <iostream>
#include <vector>

using namespace std;

int main() {
    int n;
    cin >> n;

    vector <int> a(n);
    for (int i = 0; i < n; i++) cin >> a[i];

    for(int i=0;i<a.size()-1;i++)
        for(int j=i+1;j<a.size();j++)
            if(a[i]>a[j]) swap(a[i],a[j]);

    int alr = 0;

    while (!a.empty()) {
        if (!alr) {
            for (int i = 0; i < n; i++) {
                if (a[i] != 0) {
                    cout << a[i];
                    a.erase(a.begin()+i);
                    alr = 1;
                    break;
                }
            }
        } else {
            cout << a[0];
            a.erase(a.begin());
        }
    }
}