結果
| 問題 |
No.791 うし数列
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2019-03-11 12:47:46 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 55 ms / 2,000 ms |
| コード長 | 2,455 bytes |
| コンパイル時間 | 2,098 ms |
| コンパイル使用メモリ | 78,432 KB |
| 実行使用メモリ | 50,336 KB |
| 最終ジャッジ日時 | 2024-06-23 15:29:57 |
| 合計ジャッジ時間 | 3,662 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 15 |
ソースコード
import java.util.*;
import java.io.*;
public class Main {
void solve (FastScanner in, PrintWriter out) {
String s = in.next();
if (s.charAt(0) != '1') {
out.println(-1);
return;
}
for (int i=1; i<s.length(); i++) {
if (s.charAt(i) != '3') {
out.println(-1);
return;
}
}
if (s.length() <= 1) {
out.println(-1);
return;
}
out.println(s.length()-1);
}
public static void main(String[] args) {
FastScanner in = new FastScanner(System.in);
PrintWriter out = new PrintWriter(System.out);
Main main = new Main();
main.solve(in, out);
in.close();
out.close();
}
static class FastScanner {
private InputStream in;
private byte[] buffer = new byte[8];
private int length = 0, p = 0;
public FastScanner (InputStream stream) {
in = stream;
}
public 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;
}
public int readByte () {
if (hasNextByte() == true) return buffer[p++];
return -1;
}
public boolean isPrintable (int n) {return 33<=n&&n<=126;}
public 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 t = readByte();
while (isPrintable(t)) {
sb.appendCodePoint(t);
t = readByte();
}
return sb.toString();
}
public int nextInt () {return Math.toIntExact(nextLong());}
public int[] nextIntArray (int n) {
int[] ar = new int[n];
for (int i=0; i<n; i++) ar[i] = nextInt();
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';
}
else throw new NumberFormatException();
temp = readByte();
}
return minus? -n : n;
}
public double nextDouble () {
return Double.parseDouble(next());
}
public void close () {
try {in.close();}
catch(Exception e){}
}
}
}