結果
| 問題 |
No.1043 直列大学
|
| ユーザー |
k_6101
|
| 提出日時 | 2020-05-03 11:42:58 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 246 ms / 2,000 ms |
| コード長 | 5,589 bytes |
| コンパイル時間 | 3,033 ms |
| コンパイル使用メモリ | 91,452 KB |
| 実行使用メモリ | 42,552 KB |
| 最終ジャッジ日時 | 2024-12-22 20:04:42 |
| 合計ジャッジ時間 | 9,370 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 28 |
ソースコード
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.math.BigDecimal;
import java.net.ConnectException;
import java.rmi.dgc.Lease;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.BitSet;
import java.util.Collections;
import java.util.Deque;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Objects;
import java.util.Set;
import java.util.Stack;
import java.util.TreeMap;
import java.util.TreeSet;
import static java.util.Comparator.*;
public class Main {
public static void main(String[] args) {
Main main = new Main();
main.solve();
main.out.close();
}
// ======================================================================
final int MAX = 100000;
final int MOD = (int)(1e9) + 7;
long[][] dpR = new long[2][MAX + 1010];
long[][] dpV = new long[2][MAX + 1010];
int calc(int n, int[] v, long[][] dp) {
int now, next = 0;
dp[0][0] = 1;
for (int i = 0; i < n; i++) {
now = i % 2;
next = now ^ 1;
Arrays.fill(dp[next], 0);
// dpR[next] = new int[MAX + 1];
for (int j = 0; j < MAX; j++) {
dp[next][j + v[i]] = (dp[next][j + v[i]] + dp[now][j]) % MOD;
dp[next][j] = (dp[next][j] + dp[now][j]) % MOD;
}
}
dp[next][0] = 0;
return next;
}
public void solve() {
int N = ni();
int M = ni();
int[] V = ni(N);
int[] R = ni(M);
int A = ni();
int B = ni();
// 「電圧を選んで作成する集計値」の数を計算する
int lastV = calc(N, V, dpV);
for (int i = 0; i < MAX; i++) {
dpV[lastV][i+1] = (dpV[lastV][i+1] + dpV[lastV][i]) % MOD;
}
// 「抵抗を選んで作成する集計値」の数を計算する
int lastR = calc(M, R, dpR);
long ans = 0;
int l, r;
// 抵抗の取りうる範囲を繰り返す
for (int i = 1; i < MAX; i++) {
if((long)A * i >= MAX) continue;
l = A * i; // 最小電流 A * 抵抗値 = 最小電圧
if((long)B * i >= MAX)
r = MAX-1;
else
r = B * i; // 最大電流 B * 抵抗値 = 最大電圧
if(l >= MAX) continue;
l = Math.max(l, 1);
r = Math.min(r, MAX-1);
ans += (((dpV[lastV][r] - dpV[lastV][l-1] + MOD) % MOD) * dpR[lastR][i]) % MOD;
ans %= MOD;
// out.println("(dpV[" + r + "] = " + dpV[lastV][r]
// + " - dpV[" + (l-1) + "] = " + dpV[lastV][l-1]
// + " ) * dpR[" + i + "] = " + dpR[lastR][i]
// + " = " + ((dpV[lastV][r] - dpV[lastV][l-1]) * dpR[lastR][i])
// + " --> ans = " + ans);
}
out.println(ans);
}
// ------------------------------------------
// ライブラリ
// ------------------------------------------
// Print
private PrintWriter out = new PrintWriter(System.out);
// Scanner
private FastScanner scan = new FastScanner();
int ni() {
return scan.nextInt();
}
int[] ni(int n) {
int[] a = new int[n];
for (int i = 0; i < n; i++) {
a[i] = ni();
}
return a;
}
int[][] ni(int y, int x) {
int[][] a = new int[y][x];
for (int i = 0; i < y; i++) {
for (int j = 0; j < x; j++) {
a[i][j] = ni();
}
}
return a;
}
long nl() {
return scan.nextLong();
}
long[] nl(int n) {
long[] a = new long[n];
for (int i = 0; i < n; i++) {
a[i] = nl();
}
return a;
}
long[][] nl(int y, int x) {
long[][] a = new long[y][x];
for (int i = 0; i < y; i++) {
for (int j = 0; j < x; j++) {
a[i][j] = nl();
}
}
return a;
}
String ns() {
return scan.next();
}
String[] ns(int n) {
String[] a = new String[n];
for (int i = 0; i < n; i++) {
a[i] = ns();
}
return a;
}
String[][] ns(int y, int x) {
String[][] a = new String[y][x];
for (int i = 0; i < y; i++) {
for (int j = 0; j < x; j++) {
a[i][j] = ns();
}
}
return a;
}
}
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());
}
}
k_6101