結果
問題 | No.482 あなたの名は |
ユーザー | kitakitalily |
提出日時 | 2019-04-25 11:24:16 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 1,043 ms / 2,000 ms |
コード長 | 4,737 bytes |
コンパイル時間 | 2,642 ms |
コンパイル使用メモリ | 79,804 KB |
実行使用メモリ | 99,136 KB |
最終ジャッジ日時 | 2024-04-29 11:30:28 |
合計ジャッジ時間 | 20,822 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 127 ms
58,476 KB |
testcase_01 | AC | 125 ms
58,540 KB |
testcase_02 | AC | 124 ms
58,212 KB |
testcase_03 | AC | 126 ms
58,496 KB |
testcase_04 | AC | 130 ms
58,456 KB |
testcase_05 | AC | 127 ms
58,428 KB |
testcase_06 | AC | 117 ms
57,436 KB |
testcase_07 | AC | 182 ms
58,496 KB |
testcase_08 | AC | 178 ms
58,780 KB |
testcase_09 | AC | 144 ms
58,356 KB |
testcase_10 | AC | 181 ms
58,632 KB |
testcase_11 | AC | 179 ms
58,900 KB |
testcase_12 | AC | 191 ms
59,148 KB |
testcase_13 | AC | 173 ms
58,836 KB |
testcase_14 | AC | 173 ms
58,488 KB |
testcase_15 | AC | 910 ms
97,868 KB |
testcase_16 | AC | 932 ms
96,964 KB |
testcase_17 | AC | 937 ms
95,120 KB |
testcase_18 | AC | 933 ms
97,216 KB |
testcase_19 | AC | 897 ms
97,008 KB |
testcase_20 | AC | 996 ms
97,492 KB |
testcase_21 | AC | 1,043 ms
97,464 KB |
testcase_22 | AC | 968 ms
94,368 KB |
testcase_23 | AC | 968 ms
96,632 KB |
testcase_24 | AC | 971 ms
95,040 KB |
testcase_25 | AC | 939 ms
95,372 KB |
testcase_26 | AC | 952 ms
97,716 KB |
testcase_27 | AC | 1,010 ms
99,136 KB |
testcase_28 | AC | 923 ms
95,216 KB |
testcase_29 | AC | 905 ms
98,144 KB |
testcase_30 | AC | 125 ms
58,476 KB |
ソースコード
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; static boolean[] visited; static ArrayList<E>[] edges; static int count = 0; public static void main(String[] args){ Scanner scanner = new Scanner(System.in); int n = scanner.nextInt(); long k = scanner.nextLong(); int[] d = new int[n]; for(int i = 0; i < n; i++){ d[i] = scanner.nextInt()-1; } edges = new ArrayList[n]; for(int i = 0; i < n; i++){ edges[i] = new ArrayList<E>(); } for(int i = 0; i < n; i++){ edges[i].add(new E(d[i])); } visited = new boolean[n]; int tmp = 0; for(int i = 0; i < n; i++){ if(!visited[i]){ count = 0; dfs(i); tmp += count; } } if((k-tmp) % 2 == 0 && k - tmp >= 0){ System.out.println("YES"); }else{ System.out.println("NO"); } //System.out.println(tmp); } //頂点vから始めて何頂点移動できるか?をreturn public static int dfs(int v){ if(!visited[v]){ visited[v] = true; } for(E e : edges[v]){ if(!visited[e.to]){ dfs(e.to); count++; } } return count; } static class Pair implements Comparable<Pair>{ int x, y; Pair(int a, int b){ x = a; y = b; } @Override public boolean equals(Object o){ if (this == o) return true; if (!(o instanceof Pair)) return false; Pair p = (Pair) o; return x == p.x && y == p.y; } @Override public int compareTo(Pair p){ //return x == p.x ? y - p.y : x - p.x; //xで昇順にソート //return (x == p.x ? y - p.y : x - p.x) * -1; //xで降順にソート //return y == p.y ? x - p.x : y - p.y;//yで昇順にソート return (y == p.y ? x - p.x : y - p.y)*-1;//yで降順にソート } } static class E{ int to; E(int to){ this.to = to; } } static class Edge implements Comparable<Edge>{ int from; int to; int cost; Edge(int from, int to,int cost){ this.from = from; this.to = to; this.cost = cost; } public int compareTo(Edge e) { return this.cost - e.cost; } } //繰り返し二乗法 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テーブルの初期化、これ使う場合はinitComb()で初期化必要 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[] a,long val){ return upperBound(a,0,a.length,val); } public static int upperBound(long[] a,int l,int r,long val){ if(r-l==1){ if(a[l]>val) return l; return r; } int mid=(l+r)/2; if(a[mid]>val){ return upperBound(a,l,mid,val); }else{ return upperBound(a,mid,r,val); } } public static int lowerBound(long[] a,long val){ return lowerBound(a,0,a.length,val); } public static int lowerBound(long[] a,int l,int r,long val){ if(r-l==1){ if(a[l]<val) return r; return l; } int mid=(l+r)/2; if(a[mid]<val){ return lowerBound(a,mid,r,val); }else{ return lowerBound(a,l,mid,val); } } //n,mの最大公約数 public static int gcd(int n, int m){ if(m > n) return gcd(m,n); if(m == 0) return n; return gcd(m, n%m); } }