結果
| 問題 | No.978 Fibonacci Convolution Easy |
| ユーザー |
 kitakitalily
|
| 提出日時 | 2020-01-31 23:44:25 |
| 言語 | Java21 (openjdk 21) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 7,933 bytes |
| コンパイル時間 | 2,432 ms |
| コンパイル使用メモリ | 80,168 KB |
| 実行使用メモリ | 74,648 KB |
| 最終ジャッジ日時 | 2024-09-17 11:13:18 |
| 合計ジャッジ時間 | 5,166 ms |
|
ジャッジサーバーID （参考情報） |
judge4 / 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 | WA | - |
| testcase_01 | WA | - |
| testcase_02 | AC | 90 ms
57,396 KB |
| testcase_03 | WA | - |
| testcase_04 | WA | - |
| testcase_05 | AC | 79 ms
54,940 KB |
| testcase_06 | WA | - |
| testcase_07 | AC | 140 ms
68,264 KB |
| testcase_08 | WA | - |
| testcase_09 | WA | - |
| testcase_10 | AC | 178 ms
74,300 KB |
| testcase_11 | AC | 98 ms
59,612 KB |
| testcase_12 | WA | - |
| testcase_13 | AC | 105 ms
59,996 KB |
| testcase_14 | WA | - |
| testcase_15 | WA | - |
| testcase_16 | WA | - |
| testcase_17 | AC | 180 ms
74,416 KB |
| testcase_18 | RE | - |
| testcase_19 | WA | - |
| testcase_20 | WA | - |
ソースコード
import java.util.*;
import java.io.*;
public class Main {
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);}
public static long lcm(long m, long n){ return (m/gcd(m,n))*n;}
static int mod = 1000000007;
static int INF = Integer.MAX_VALUE;
static int[] dx = {0,0,1,-1};
static int[] dy = {1,-1,0,0};
static int[] dx8 = {0,0,1,-1,1,1,-1,-1};
static int[] dy8 = {1,-1,0,0,1,-1,-1,1};
public static void main(String[] args){
FastScanner scanner = new FastScanner();
int n = scanner.nextInt();
long p = scanner.nextLong();
long[] a = new long[n];
a[0] = 0; a[1] = 1;
long sum = 1;
for(int i = 2; i < n; i++){
a[i] = (p * a[i-1]%mod + a[i-2])%mod;
sum += a[i];
sum %= mod;
}
sum *= sum%mod;
sum %= mod;
long sum2 = 0;
for(int i = 0; i < n; i++){
sum2 += a[i]*a[i]%mod;
sum2 %= mod;
}
long ans = (sum-sum2+mod)/2+sum2;
ans %= mod;
System.out.println(ans);
}
static class Union_Find {
int[] parent;
public Union_Find(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)];
}
}
// tar の方が数字が大きいかどうか
static boolean compare(String tar, String src) {
if (src == null) return true;
if (src.length() == tar.length()) {
int len = tar.length();
for (int i = 0; i < len; i++) {
if (src.charAt(i) > tar.charAt(i)) {
return false;
} else if (src.charAt(i) < tar.charAt(i)) {
return true;
}
}
return tar.compareTo(src) > 0 ? true : false;
} else if (src.length() < tar.length()) {
return true;
} else if (src.length() > tar.length()) {
return false;
}
return false;
}
static class Edge2 implements Comparable<Edge2>{
int from;
int to;
int cost;
Edge2(int from, int to, int cost){
this.from = from;
this.to = to;
this.cost = cost;
}
public int compareTo(Edge2 e){
return cost-e.cost;
}
}
static class RMQ {
private int size_, dat[];
private int query_(int a, int b, int k, int l, int r) {
if(r <= a || b <= l) return 2147483647;
if(a <= l && r <= b) return dat[k];
int lc = query_(a, b, 2 * k, l, (l + r) / 2);
int rc = query_(a, b, 2 * k + 1, (l + r) / 2, r);
return Math.min(lc, rc);
}
RMQ(int s) {
for(size_ = 1; size_ < s;) size_ *= 2;
dat = new int[size_ * 2];
for(int i = 0; i < size_ * 2; i++) dat[i] = 2147483647;
}
public void update(int pos, int x) {
pos += size_; dat[pos] = x;
while(pos > 1) {
pos /= 2;
dat[pos] = Math.min(dat[2 * pos], dat[2 * pos + 1]);
}
}
public int query(int l, int r) {
return query_(l, r, 1, 0, size_);
}
}
static int size = 200000;
static long[] fac = new long[size];
static long[] finv = new long[size];
static long[] inv = new long[size];
//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;
}
public static long div(long x, long y){
return (x*pow(y, mod-2))%mod;
}
//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 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で昇順にソート
//return (first == p.first ? second - p.second : first - p.first) * -1; //firstで降順にソート
//return second == p.second ? first - p.first : second - p.second;//secondで昇順にソート
//return (second == p.second ? first - p.first : second - p.second)*-1;//secondで降順にソート
//return first * 1.0 / second > p.first * 1.0 / p.second ? 1 : -1; // first/secondの昇順にソート
//return first * 1.0 / second < p.first * 1.0 / p.second ? 1 : -1; // first/secondの降順にソート
//return second * 1.0 / first > p.second * 1.0 / p.first ? 1 : -1; // second/firstの昇順にソート
//return second * 1.0 / first < p.second * 1.0 / p.first ? 1 : -1; // second/firstの降順にソート
//return Math.atan2(second, first) > Math.atan2(p.second, p.first) ? 1 : -1; // second/firstの昇順にソート
//return first + second > p.first + p.second ? 1 : -1; //first+secondの昇順にソート
//return first + second < p.first + p.second ? 1 : -1; //first+secondの降順にソート
//return first - second < p.first - p.second ? 1 : -1; //first-secondの降順にソート
//return second - first < p.second - p.first ? 1 : -1; //first-secondの昇順にソート
//return second - first < p.second - p.first ? -1 : 1; //second-firstの昇順にソート
//return Math.atan2(second,first) > Math.atan2(p.second, p.first) ? 1 : -1;
}
}
private static class FastScanner {
private final InputStream in = System.in;
private final byte[] buffer = new byte[1024];
private int ptr = 0;
private int buflen = 0;
private boolean hasNextByte() {
if (ptr < buflen) {
return true;
}else{
ptr = 0;
try {
buflen = in.read(buffer);
} catch (IOException e) {
e.printStackTrace();
}
if (buflen <= 0) {
return false;
}
}
return true;
}
private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;}
private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
public boolean hasNext() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte();}
public String next() {
if (!hasNext()) throw new NoSuchElementException();
StringBuilder sb = new StringBuilder();
int b = readByte();
while(isPrintableChar(b)) {
sb.appendCodePoint(b);
b = readByte();
}
return sb.toString();
}
public long nextLong() {
if (!hasNext()) throw new NoSuchElementException();
long n = 0;
boolean minus = false;
int b = readByte();
if (b == '-') {
minus = true;
b = readByte();
}
if (b < '0' || '9' < b) {
throw new NumberFormatException();
}
while(true){
if ('0' <= b && b <= '9') {
n *= 10;
n += b - '0';
}else if(b == -1 || !isPrintableChar(b)){
return minus ? -n : n;
}else{
throw new NumberFormatException();
}
b = readByte();
}
}
public int nextInt() {
long nl = nextLong();
if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
return (int) nl;
}
public double nextDouble() { return Double.parseDouble(next());}
}
}