[백준] 3. 반복문 풀이

[2739번] 1. 구구단

C++

#include<iostream>

int main(int argc, char* argv[])
{
    int N;
    std::cin >> N;
    for (int i = 1; i < 10; ++i) {
        std::cout << N << " * " << i << " = " << N * i << std::endl;
    }

    return 0;
}

Python

N = int(input())

for i in range(1, 10):
    print("{} * {} = {}".format(N, i, N*i))

[10950번] 2. A+B - 3

C++

#include <iostream>

int main()
{
    int iter, A, B;
    std::cin >> iter;
    for (int i = 1; i <= iter; ++i) {
        std::cin >> A >> B;
        std::cout << A + B << std::endl;
    }
    return 0;
}

Python

iter = int(input())

for i in range(iter):
    A, B = list(map(int, input().split()))
    print(A+B)

[8393번] 3. 합

C++

#include <iostream>

int main()
{
    int n;
    int answer = 0;

    std::cin >> n;

    for (int i = 1; i <= n; ++i) {
        answer += i;
    }

    std::cout << answer;
    
    return 0;
}

Python

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

[15552번] 4. 빠른 A+B

C++

#include <iostream>

int main()
{
    std::ios::sync_with_stdio(false); std::cin.tie(NULL);

    int n;
    int A, B;

    std::cin >> n;

    for (int i = 1; i <= n; ++i) {
        std::cin >> A >> B;
        std::cout << A + B << "\n";
    }
    
    return 0;
}

Python

import sys

input = sys.stdin.readline

n = int(input())

for i in range(1, n+1):
    A, B = list(map(int, input().split()))
    print(A+B)

[2741번] 5. N 찍기

C++

#include <iostream>

int main()
{
    std::ios::sync_with_stdio(false); std::cin.tie(NULL); std::cout.tie(NULL);

    int N;
    std::cin >> N;

    for (int i = 1; i <= N; ++i) {
        std::cout << i << "\n";
    }
    return 0;
}

Python

import sys

input = sys.stdin.readline
N = int(input())

for i in range(1, N+1):
    print(i)

[2742번] 6. 기찍 N

C++

#include <iostream>

int main()
{
    std::ios::sync_with_stdio(false); std::cin.tie(NULL); std::cout.tie(NULL);

    int N;
    std::cin >> N;

    for (int i = N; i >= 1; --i) {
        std::cout << i << "\n";
    }
    return 0;
}

Python

import sys

input = sys.stdin.readline
N = int(input())

for i in range(N, 0, -1):
    print(i)

[11021번] 7. A+B - 7

C++

#include <iostream>

int main()
{
    std::ios::sync_with_stdio(false); std::cin.tie(NULL);

    int n;
    int A, B;

    std::cin >> n;

    for (int i = 1; i <= n; ++i) {
        std::cin >> A >> B;
        std::cout << "Case #" << i << ": " << A+B << "\n";
    }
    
    return 0;
}

Python

import sys

input = sys.stdin.readline

n = int(input())

for i in range(1, n+1):
    A, B = list(map(int, input().split()))
    print("Case #{}: {}".format(i, A+B))

[11022번] 8. A+B - 8

C++

#include <iostream>

int main()
{
    std::ios::sync_with_stdio(false); std::cin.tie(NULL);

    int n;
    int A, B;

    std::cin >> n;

    for (int i = 1; i <= n; ++i) {
        std::cin >> A >> B;
        std::cout << "Case #" << i << ": " << A << " + " << B << " = " << A+B << "\n";
    }
    
    return 0;
}

Python

import sys

input = sys.stdin.readline

n = int(input())

for i in range(1, n+1):
    A, B = list(map(int, input().split()))
    print("Case #{}: {} + {} = {}".format(i, A, B, A+B))

[2438번] 9. 별 찍기 - 1

C++

#include <iostream>
#include <string>

int main(int argc, char* argv[])
{
    int N;
    std::cin >> N;
    std::string str("*");
    for (int i = 1; i <= N; ++i) {
        str.resize(i, '*');
        std::cout << str << "\n";
    }

    return 0;
}

Python

import sys

input = sys.stdin.readline

n = int(input())

for i in range(1, n+1):
    print("*" * i)

[2439번] 10. 별 찍기 - 2

C++

#include <iostream>
#include <string>

int main(int argc, char* argv[])
{
    int N;
    std::cin >> N;
    std::string str(" ");
    for (int i = N; i >= 1; --i) {
        str.resize(i-1, ' ');
        str.resize(N, '*');
        std::cout << str << "\n";
    }

    return 0;
}

Python

import sys

input = sys.stdin.readline

n = int(input())

for i in range(1, n+1):
    print(" " * (n-i) + "*" * i)

[10871번] 11. X보다 작은 수

C++

#include <iostream>

int main()
{
    std::ios::sync_with_stdio(false); std::cin.tie(NULL); std::cout.tie(NULL);

    int n, x, a;
    std::cin >> n >> x;
    for (int i = 1; i <= n; ++i) {
        std::cin >> a;
        if (a < x) {
            std::cout << a << " ";
        }
    }

    return 0;
}

Python

import sys

input = sys.stdin.readline

n, x = list(map(int, input().split()))
A = list(map(int, input().split()))


for a in A:
    if a < x:
        print(a, end=' ')

[10952번] 12. A+B - 5

C++

#include <iostream>

int main()
{
    std::ios::sync_with_stdio(false); std::cin.tie(NULL); std::cout.tie(NULL);

    int A, B;
    std::cin >> A >> B;
    while (A != 0 && B != 0) {
        std::cout << A+B << "\n";
        std::cin >> A >> B;
    }

    return 0;
}

Python

import sys

input = sys.stdin.readline

A, B = list(map(int, input().split()))

while A != 0 and B != 0:
    print(A+B)
    A, B = list(map(int, input().split()))

[10951번] 13. A+B - 4

C++

#include <iostream>

int main()
{   
    int A, B;
    while (true) {
        std::cin >> A >> B;
        if (std::cin.eof()) {
            break;
        }
        std::cout << A + B << "\n";
    }
    return 0;
}

Python

import sys

input = sys.stdin.readline

for line in sys.stdin:
    A, B = list(map(int, line.split()))
    print(A+B)

[1110번] 14. 더하기 사이클

C++

#include <iostream>

int main()
{   
    std::ios::sync_with_stdio(false); std::cin.tie(NULL); std::cout.tie(NULL);

    int num, sum_num, new_num, cnt;
    cnt = 1;
    std::cin >> num;

    if (num < 10) {
        new_num = 11*num;
    }
    else {
        sum_num = num / 10 + num % 10;
        new_num = num % 10 * 10 + sum_num % 10; 
    }

    while (new_num != num) {
        sum_num = new_num / 10 + new_num % 10;
        new_num = new_num % 10 * 10 + sum_num % 10;
        cnt++;
    }
    
    std::cout << cnt;
    return 0;
}

Python

import sys

input = sys.stdin.readline

number, cnt = input().strip(), 0
if len(number) == 1:
    number = "0"+number
sum_number = int(number[0]) + int(number[1])
new_number = number[-1] + str(sum_number)[-1]
cnt += 1

while new_number != number:
    sum_number = int(new_number[0]) + int(new_number[1])
    new_number = new_number[-1] + str(sum_number)[-1]
    cnt += 1
print(cnt)