Submission #2121342
Source Code Expand
import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.InputMismatchException; import java.util.NoSuchElementException; public class Main { static PrintWriter out; static InputReader ir; static void solve() { int x=ir.nextInt(); for(int i=1;;i++){ int tot=(i+1)*i/2; if(tot>=x){ out.println(i); return; } } } public static void main(String[] args) throws Exception { ir = new InputReader(System.in); out = new PrintWriter(System.out); solve(); out.flush(); } static class InputReader { private InputStream in; private byte[] buffer = new byte[1024]; private int curbuf; private int lenbuf; public InputReader(InputStream in) { this.in = in; this.curbuf = this.lenbuf = 0; } public boolean hasNextByte() { if (curbuf >= lenbuf) { curbuf = 0; try { lenbuf = in.read(buffer); } catch (IOException e) { throw new InputMismatchException(); } if (lenbuf <= 0) return false; } return true; } private int readByte() { if (hasNextByte()) return buffer[curbuf++]; else return -1; } private boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); } private void skip() { while (hasNextByte() && isSpaceChar(buffer[curbuf])) curbuf++; } public boolean hasNext() { skip(); return hasNextByte(); } public String next() { if (!hasNext()) throw new NoSuchElementException(); StringBuilder sb = new StringBuilder(); int b = readByte(); while (!isSpaceChar(b)) { sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } public int nextInt() { if (!hasNext()) throw new NoSuchElementException(); int c = readByte(); while (isSpaceChar(c)) c = readByte(); boolean minus = false; if (c == '-') { minus = true; c = readByte(); } int res = 0; do { if (c < '0' || c > '9') throw new InputMismatchException(); res = res * 10 + c - '0'; c = readByte(); } while (!isSpaceChar(c)); return (minus) ? -res : res; } public long nextLong() { if (!hasNext()) throw new NoSuchElementException(); int c = readByte(); while (isSpaceChar(c)) c = readByte(); boolean minus = false; if (c == '-') { minus = true; c = readByte(); } long res = 0; do { if (c < '0' || c > '9') throw new InputMismatchException(); res = res * 10 + c - '0'; c = readByte(); } while (!isSpaceChar(c)); return (minus) ? -res : res; } public double nextDouble() { return Double.parseDouble(next()); } public int[] nextIntArray(int n) { int[] a = new int[n]; for (int i = 0; i < n; i++) a[i] = nextInt(); return a; } public long[] nextLongArray(int n) { long[] a = new long[n]; for (int i = 0; i < n; i++) a[i] = nextLong(); return a; } public char[][] nextCharMap(int n, int m) { char[][] map = new char[n][m]; for (int i = 0; i < n; i++) map[i] = next().toCharArray(); return map; } } }
Submission Info
Submission Time | |
---|---|
Task | C - Go Home |
User | holeguma |
Language | Java8 (OpenJDK 1.8.0) |
Score | 200 |
Code Size | 3234 Byte |
Status | AC |
Exec Time | 71 ms |
Memory | 23124 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 200 / 200 | ||||
Status |
|
|
Set Name | Test Cases |
---|---|
Sample | 0_000.txt, 0_001.txt, 0_002.txt |
All | 0_000.txt, 0_001.txt, 0_002.txt, 1_003.txt, 1_004.txt, 1_005.txt, 1_006.txt, 1_007.txt, 1_008.txt, 1_009.txt, 1_010.txt, 1_011.txt, 1_012.txt, 1_013.txt, 1_014.txt, 1_015.txt, 1_016.txt, 1_017.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
0_000.txt | AC | 69 ms | 18900 KB |
0_001.txt | AC | 69 ms | 18004 KB |
0_002.txt | AC | 67 ms | 18644 KB |
1_003.txt | AC | 67 ms | 21332 KB |
1_004.txt | AC | 69 ms | 18004 KB |
1_005.txt | AC | 67 ms | 18004 KB |
1_006.txt | AC | 68 ms | 21332 KB |
1_007.txt | AC | 68 ms | 23124 KB |
1_008.txt | AC | 71 ms | 21204 KB |
1_009.txt | AC | 68 ms | 19156 KB |
1_010.txt | AC | 70 ms | 17876 KB |
1_011.txt | AC | 69 ms | 19156 KB |
1_012.txt | AC | 69 ms | 21076 KB |
1_013.txt | AC | 69 ms | 19156 KB |
1_014.txt | AC | 70 ms | 22740 KB |
1_015.txt | AC | 69 ms | 19156 KB |
1_016.txt | AC | 69 ms | 19924 KB |
1_017.txt | AC | 68 ms | 21204 KB |