結果
| 問題 |
No.1747 Many Formulae 2
|
| コンテスト | |
| ユーザー |
nishi5451
|
| 提出日時 | 2021-11-25 17:43:54 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 54 ms / 2,000 ms |
| コード長 | 2,987 bytes |
| コンパイル時間 | 2,388 ms |
| コンパイル使用メモリ | 78,824 KB |
| 実行使用メモリ | 37,192 KB |
| 最終ジャッジ日時 | 2024-06-28 10:23:34 |
| 合計ジャッジ時間 | 4,194 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| other | AC * 19 |
ソースコード
import java.util.*;
import java.util.stream.*;
import java.io.*;
public class Main {
static final int INF = 1<<30;
static final long INFL = 1L<<60;
static final int MOD = 1000000007;
static final int MOD2 = 998244353;
static List<List<Integer>> g;
static boolean isPrime(long n){
if(n == 1) return false;
for(long i = 2; i*i <= n; i++){
if(n%i == 0) return false;
}
return true;
}
public static void main(String[] args) {
FastScanner fs = new FastScanner();
PrintWriter pw = new PrintWriter(System.out);
String s = fs.next();
int n = s.length();
int[] val = new int[n];
for(int i = 0; i < n; i++) val[i] = Character.getNumericValue(s.charAt(i));
int ans = 0;
for(int bit = 0; bit < 1<<(n-1); bit++){
long sum = 0;
long now = val[0];
for(int i = 0; i < n-1; i++){
if((bit>>i & 1) == 1){
sum += now;
now = val[i+1];
} else {
now = now*10 + val[i+1];
}
}
sum += now;
if(isPrime(sum)) ans++;
}
pw.println(ans);
pw.close();
}
}
class FastScanner {
private InputStream in = System.in;
private byte[] buffer = new byte[1024];
private int length = 0, p = 0;
private boolean hasNextByte() {
if (p < length) return true;
else{
p = 0;
try{
length = in.read(buffer);
}catch(Exception e){
e.printStackTrace();
}
if(length == 0) return false;
}
return true;
}
private int readByte() {
if (hasNextByte() == true) return buffer[p++];
return -1;
}
private static boolean isPrintable(int n) {
return 33 <= n && n <= 126;
}
private void skip() {
while (hasNextByte() && !isPrintable(buffer[p])) p++;
}
public boolean hasNext() {
skip();
return hasNextByte();
}
public String next() {
if(!hasNext()) throw new NoSuchElementException();
StringBuilder sb = new StringBuilder();
int temp = readByte();
while (isPrintable(temp)) {
sb.appendCodePoint(temp);
temp = readByte();
}
return sb.toString();
}
public int nextInt() {
return Math.toIntExact(nextLong());
}
public int[] nextInts(int n) {
int[] ar = new int[n];
for (int i = 0; i < n; i++) ar[i] = nextInt();
return ar;
}
public long[] nextLongs(int n) {
long[] ar = new long[n];
for (int i = 0; i < n; i++) ar[i] = nextLong();
return ar;
}
public long nextLong() {
if(!hasNext()) throw new NoSuchElementException();
boolean minus = false;
int temp = readByte();
if (temp == '-') {
minus = true;
temp = readByte();
}
if (temp < '0' || '9' < temp) throw new NumberFormatException();
long n = 0;
while (isPrintable(temp)) {
if ('0' <= temp && temp <= '9') {
n *= 10;
n += temp - '0';
}
temp = readByte();
}
return minus ? -n : n;
}
public char[] nextChars() {
String s = next();
return s.toCharArray();
}
public char[][] nextCharMat(int h, int w) {
char[][] ar = new char[h][w];
for(int i = 0; i < h; i++){
String s = next();
for(int j = 0; j < w; j++){
ar[i][j] = s.charAt(j);
}
}
return ar;
}
}
nishi5451