結果
| 問題 |
No.1011 Infinite Stairs
|
| コンテスト | |
| ユーザー |
 Oland
|
| 提出日時 | 2020-03-21 09:30:00 |
| 言語 | Java (openjdk 23) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 7,063 bytes |
| コンパイル時間 | 3,002 ms |
| コンパイル使用メモリ | 78,928 KB |
| 実行使用メモリ | 477,528 KB |
| 最終ジャッジ日時 | 2024-12-17 22:35:54 |
| 合計ジャッジ時間 | 9,732 ms |
|
ジャッジサーバーID （参考情報） |
judge5 / judge3 |
（要ログイン）
| ファイルパターン | 結果 |
|---|---|
| sample | WA * 3 |
| other | WA * 24 |
ソースコード
import java.io.*;
import java.util.*;
@SuppressWarnings("unused")
public class Main {
FastScanner in;
PrintWriter out;
final static int MOD = (int)1e9+7;
final static long INF = Long.MAX_VALUE / 2;
void solve(){
int N = in.nextInt(), d = in.nextInt(), K = in.nextInt();
long[][] dp = new long[K+1][N+1], sum = new long[K+1][N+1];
dp[0][0] = 1;
for(int i = 0; i <= K; i++) sum[i][0] = 1;
for(int i = 1; i <= K; i++){
for(int j = 1; j <= N; j++){
int p = Math.max(0, i - d);
long tmp = (sum[i-1][j-1] - sum[p][j-1]);
if(tmp < 0) tmp += MOD;
dp[i][j] = tmp + dp[p][j-1];
if(dp[i][j] >= MOD) dp[i][j] -= MOD;
sum[i][j] = sum[i-1][j] + dp[i][j];
if(sum[i][j] >= MOD) sum[i][j] -= MOD;
}
}
out.println(dp[K][N]);
}
public static void main(String[] args) {
new Main().m();
}
private void m() {
in = new FastScanner(System.in);
out = new PrintWriter(System.out);
/*
try {
String path = "input.txt";
out = new PrintWriter(new BufferedWriter(new FileWriter(new File(path))));
}catch (IOException e){
e.printStackTrace();
}
*/
long s = System.currentTimeMillis();
solve();
long t = System.currentTimeMillis();
out.println(t - s);
out.flush();
in.close();
out.close();
}
static class FastScanner {
private Reader input;
public FastScanner() {this(System.in);}
public FastScanner(InputStream stream) {this.input = new BufferedReader(new InputStreamReader(stream));}
public void close() {
try {
this.input.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public int nextInt() {return (int) nextLong();}
public long nextLong() {
try {
int sign = 1;
int b = input.read();
while ((b < '0' || '9' < b) && b != '-' && b != '+') {
b = input.read();
}
if (b == '-') {
sign = -1;
b = input.read();
} else if (b == '+') {
b = input.read();
}
long ret = b - '0';
while (true) {
b = input.read();
if (b < '0' || '9' < b) return ret * sign;
ret *= 10;
ret += b - '0';
}
} catch (IOException e) {
e.printStackTrace();
return -1;
}
}
public double nextDouble() {
try {
double sign = 1;
int b = input.read();
while ((b < '0' || '9' < b) && b != '-' && b != '+') {
b = input.read();
}
if (b == '-') {
sign = -1;
b = input.read();
} else if (b == '+') {
b = input.read();
}
double ret = b - '0';
while (true) {
b = input.read();
if (b < '0' || '9' < b) break;
ret *= 10;
ret += b - '0';
}
if (b != '.') return sign * ret;
double div = 1;
b = input.read();
while ('0' <= b && b <= '9') {
ret *= 10;
ret += b - '0';
div *= 10;
b = input.read();
}
return sign * ret / div;
} catch (IOException e) {
e.printStackTrace();
return Double.NaN;
}
}
public char nextChar() {
try {
int b = input.read();
while (Character.isWhitespace(b)) {
b = input.read();
}
return (char) b;
} catch (IOException e) {
e.printStackTrace();
return 0;
}
}
public String nextStr() {
try {
StringBuilder sb = new StringBuilder();
int b = input.read();
while (Character.isWhitespace(b)) {
b = input.read();
}
while (b != -1 && !Character.isWhitespace(b)) {
sb.append((char) b);
b = input.read();
}
return sb.toString();
} catch (IOException e) {
e.printStackTrace();
return "";
}
}
public String nextLine() {
try {
StringBuilder sb = new StringBuilder();
int b = input.read();
while (b != -1 && b != '\n') {
sb.append((char) b);
b = input.read();
}
return sb.toString();
} catch (IOException e) {
e.printStackTrace();
return "";
}
}
public int[] nextIntArray(int n) {
int[] res = new int[n];
for (int i = 0; i < n; i++) {
res[i] = nextInt();
}
return res;
}
public int[] nextIntArrayDec(int n) {
int[] res = new int[n];
for (int i = 0; i < n; i++) {
res[i] = nextInt() - 1;
}
return res;
}
public int[] nextIntArray1Index(int n) {
int[] res = new int[n + 1];
for (int i = 0; i < n; i++) {
res[i + 1] = nextInt();
}
return res;
}
public long[] nextLongArray(int n) {
long[] res = new long[n];
for (int i = 0; i < n; i++) {
res[i] = nextLong();
}
return res;
}
public long[] nextLongArrayDec(int n) {
long[] res = new long[n];
for (int i = 0; i < n; i++) {
res[i] = nextLong() - 1;
}
return res;
}
public long[] nextLongArray1Index(int n) {
long[] res = new long[n + 1];
for (int i = 0; i < n; i++) {
res[i + 1] = nextLong();
}
return res;
}
public double[] nextDoubleArray(int n) {
double[] res = new double[n];
for (int i = 0; i < n; i++) {
res[i] = nextDouble();
}
return res;
}
}
}