백준 8393, 11021, 2675, 2742, 1546(C++, python)

8393 합

C++

#include <iostream>
using namespace std;

int main(void)
{
    int n, sum;

    sum = 0;
    cin >> n;
    for (int i = 1; i <= n; i++)
        sum += i;
    cout << sum << endl;
    return (0);
}

Python

n = int(input())
sum = 0
for i in range (n + 1):
    sum = sum + i
print(sum)

11021

C++

#include <iostream>
using namespace std;

int main(void)
{
    int n, a, b, sum;

    cin >> n;
    for (int i = 1; i <= n; i++)
    {
        sum = 0;
        cin >> a >> b;
        sum = a + b;
        cout << "Case #" << i << ": " << sum << "\n";
    }
    return (0);
}

Python

n = int(input())

for i in range (n):
    a,b = map(int, input().split())
    sum = a + b
    print("Case #%s: %s"%(i+1, sum))

2675

C++

#include <iostream>
using namespace std;

int main(void)
{
    int n, r;
    string str;

    cin >> n;
    for(int i = 0; i < n; i++)
    {
        cin >> r >> str;
        for (int j = 0; j < str.length(); j++)
        {
            for (int k = 0; k < r; k++)
            {
                cout << str[j];
            }
        }
        cout << endl;
    }
    return (0);
}

Python

n = int(input())

for i in range(n):
    r, str = input().split()
    for j in str:
        print(j*int(r), end="")
    print() //줄바꿈

2742

C++

#include <iostream>
using namespace std;

int main(int argc, char const *argv[])
{
    int n;

    cin >> n;
    for(int i = n; i > 0; i--)
    {
        cout << i << "\n";; //endl을 사용하면 버퍼 비워내야해서 시간초과 뜬다.
    }
    return (0);
}

Python

n = int(input())

for i in range (n):
    print(n - i)

1546

C++

#include <iostream>
using namespace std;

double get_sum(int max, double* score, int n)
{
    double sum = 0;

    for (int j = 0; j < n; j++)
    {
        score[j] = score[j] / max * 100;
        sum += score[j];
    }
    return (sum / n);
}

int main(void)
{
    int n;
    double score[1000] = {}, avg = 0, max = 0;

    cin >> n;
    for (int i = 0; i < n; i++)
    {
        cin >> score[i];
        if (max < score[i])
            max = score[i];
    }
    avg = get_sum(max, score, n);
    cout << fixed;
    cout.precision(3);
    cout << avg << endl;
    return (0);
}

Python

n = int(input())
score = list(map(int, input().split()))
max = max(score)

for i in range(n):
    score[i] = score[i] / max * 100
avg = sum(score) / n
print(round(avg,3))