goorm 문자열 번갈아 출력하기, 벡터의 +, - 연산, 구구단+

문자열 번갈아 출력하기

# -*- coding: utf-8 -*-
# UTF-8 encoding when using korean
s = input()
l = len(s)
if(l%2==0):
	frt = s[0:int(l/2):1]
	lst = s[l-1:int(l/2)-1:-1]
else:
	frt = s[0:int(l/2)+1:1]
	lst = s[l-1:int(l/2):-1]
i = 0	
while(1):
	if(i+1>len(frt)):
		break
	print(frt[i], end='')
	if(i+1>len(lst)):
		break
	print(lst[i], end='')
	i += 1

 

벡터의 +, - 연산

# -*- coding: utf-8 -*-
# UTF-8 encoding when using korean
x1, y1 = map(float, input().split(' '))
x2, y2 = map(float, input().split(' '))
op = input()
if(op=='+'):
	print(format(x1+x2, '.2f'), format(y1+y2, '.2f'))
else:
	print(format(x1-x2, '.2f'), format(y1-y2, '.2f'))

 

구구단+

#include <iostream>
using namespace std;
int main() {
	int n;
	cin >> n;
	for(int i = 2; i <10; i++){
		for(int j = 1; j < 10; j++){
			cout << i <<" * "<<j <<" = "<< i*j <<" ";
			if(j%n==0){
				cout<<endl;
			}
		}
	}
	return 0;
}