結果

問題 No.276 連続する整数の和(1)
ユーザー kitakitalilykitakitalily
提出日時 2019-05-30 22:32:08
言語 Java
(openjdk 23)
結果
AC  
実行時間 138 ms / 1,000 ms
コード長 4,345 bytes
コンパイル時間 2,269 ms
コンパイル使用メモリ 79,268 KB
実行使用メモリ 58,636 KB
最終ジャッジ日時 2024-09-17 16:10:23
合計ジャッジ時間 4,268 ms
ジャッジサーバーID
(参考情報)
judge4 / judge2
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ファイルパターン 結果
other AC * 10
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ソースコード

diff #
プレゼンテーションモードにする

import java.util.*;
public class Main {
static int mod = 1000000007;
static int size = 200000;
static long[] fac = new long[size];
static long[] finv = new long[size];
static long[] inv = new long[size];
static int INF = Integer.MAX_VALUE;
public static void main(String[] args){
Scanner scanner = new Scanner(System.in);
long n = scanner.nextLong();
if(n % 2 == 0){
System.out.println(gcd(n*(n+1)/2,n));
}else{
System.out.println(n);
}
}
public static void swap(long a, long b){
long tmp = 0;
if(a > b){
tmp = a;
a = b;
b = tmp;
}
}
public static class Edge{
int to;
int cost;
Edge(int to, int cost){
this.to = to;
this.cost = cost;
}
}
static class Pair implements Comparable<Pair>{
int first, second;
Pair(int a, int b){
first = a;
second = b;
}
@Override
public boolean equals(Object o){
if (this == o) return true;
if (!(o instanceof Pair)) return false;
Pair p = (Pair) o;
return first == p.first && second == p.second;
}
@Override
public int compareTo(Pair p){
return first == p.first ? second - p.second : first - p.first; //first
//return (first == p.first ? second - p.second : first - p.first) * -1; //first
//return second == p.second ? first - p.first : second - p.second;//second
//return (second == p.second ? first - p.first : second - p.second)*-1;//second
}
}
//
public static long pow(long x, long n){
long ans = 1;
while(n > 0){
if((n & 1) == 1){
ans = ans * x;
ans %= mod;
}
x = x * x % mod;
n >>= 1;
}
return ans;
}
//fac, inv, finv使initComb()
public static void initComb(){
fac[0] = finv[0] = inv[0] = fac[1] = finv[1] = inv[1] = 1;
for (int i = 2; i < size; ++i) {
fac[i] = fac[i - 1] * i % mod;
inv[i] = mod - (mod / i) * inv[(int) (mod % i)] % mod;
finv[i] = finv[i - 1] * inv[i] % mod;
}
}
//nCk % mod
public static long comb(int n, int k){
return fac[n] * finv[k] % mod * finv[n - k] % mod;
}
//n! % mod
public static long fact(int n){
return fac[n];
}
//(n!)^-1 with % mod
public static long finv(int n){
return finv[n];
}
static class UnionFind {
int[] parent;
public UnionFind(int size) {
parent = new int[size];
Arrays.fill(parent, -1);
}
public boolean unite(int x, int y) {
x = root(x);
y = root(y);
if (x != y) {
if (parent[y] < parent[x]) {
int tmp = y;
y = x;
x = tmp;
}
parent[x] += parent[y];
parent[y] = x;
return true;
}
return false;
}
public boolean same(int x, int y) {
return root(x) == root(y);
}
public int root(int x) {
return parent[x] < 0 ? x : (parent[x] = root(parent[x]));
}
public int size(int x) {
return -parent[root(x)];
}
}
public static int upperBound(long[] array, long value) {
int low = 0;
int high = array.length;
int mid;
while( low < high ) {
mid = ((high - low) >>> 1) + low; // (high + low) / 2
if( array[mid] <= value ) {
low = mid + 1;
} else {
high = mid;
}
}
return low;
}
public static final int lowerBound(final long[] arr, final long value) {
int low = 0;
int high = arr.length;
int mid;
while (low < high) {
mid = ((high - low) >>> 1) + low; //(low + high) / 2 ()
if (arr[mid] < value) {
low = mid + 1;
} else {
high = mid;
}
}
return low;
}
//n,m
public static long gcd(long n, long m){
if(m > n) return gcd(m,n);
if(m == 0) return n;
return gcd(m, n%m);
}
//3
private class Pair2 implements Comparable<Pair2> {
String s;
int p;
int index;
public Pair2(String s, int p, int index) {
this.s = s;
this.p = p;
this.index = index;
}
public int compareTo(Pair2 other) {
if (s.equals(other.s)) {
return other.p - this.p;
}
return this.s.compareTo(other.s);
}
}
}
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