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AlgorithmStudy_Java
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AlgorithmStudy_Java
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src
/
backjoon
/
_11720.java
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57 lines (50 loc) · 1.33 KB
master
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AlgorithmStudy_Java
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src
/
backjoon
/
_11720.java
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package
backjoon
;
import
java
.
io
.
BufferedReader
;
import
java
.
io
.
IOException
;
import
java
.
io
.
InputStreamReader
;
// https://www.acmicpc.net/problem/11720
// 숫자의 합
public
class
_11720
{
public
static
void
main
(
String
[]
args
)
throws
IOException
{
// sol1 배열사용
// memory 11652 runtime 84
/*
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int cnt = Integer.parseInt(br.readLine());
String[] nums = br.readLine().split("");
int sum = 0;
//Convert String array to int array
int[] intNums = new int[cnt];
for(int i=0; i<cnt; i++){
intNums[i] = Integer.parseInt(nums[i]);
}
//Sum
for(int n : intNums){
sum += n;
}
System.out.println(sum);
*/
// sol2 배열사용하지않고 getBytes()사용
// memory 11480 runtime 80
BufferedReader
br
=
new
BufferedReader
(
new
InputStreamReader
(
System
.
in
));
br
.
readLine
();
// cnt는 사용하지 않으므로 입력만 받음
int
sum
=
0
;
for
(
byte
n
:
br
.
readLine
().
getBytes
()){
sum
+= (
n
-
48
);
//sum += (n - '0'); // n-48과 n-'0'은 같은 의미인데 그 이유는 아스키코드에서 숫자 1은 49부터 시작하기때문에 숫자 0인 48을 빼줘야 함.
}
System
.
out
.
println
(
sum
);
}
}
/*
input
1
1
output
1
input
25
7000000000000000000000000
output
7
*/
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