結果
問題 | No.895 MESE |
ユーザー | kitakitalily |
提出日時 | 2019-09-28 14:02:40 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 171 ms / 2,000 ms |
コード長 | 4,965 bytes |
コンパイル時間 | 2,068 ms |
コンパイル使用メモリ | 77,988 KB |
実行使用メモリ | 52,456 KB |
最終ジャッジ日時 | 2024-10-02 03:42:31 |
合計ジャッジ時間 | 7,489 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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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 | 121 ms
52,184 KB |
testcase_01 | AC | 116 ms
52,344 KB |
testcase_02 | AC | 118 ms
52,328 KB |
testcase_03 | AC | 119 ms
52,380 KB |
testcase_04 | AC | 119 ms
52,236 KB |
testcase_05 | AC | 115 ms
52,224 KB |
testcase_06 | AC | 118 ms
52,184 KB |
testcase_07 | AC | 116 ms
52,196 KB |
testcase_08 | AC | 122 ms
52,296 KB |
testcase_09 | AC | 121 ms
52,280 KB |
testcase_10 | AC | 120 ms
52,244 KB |
testcase_11 | AC | 116 ms
52,336 KB |
testcase_12 | AC | 116 ms
52,408 KB |
testcase_13 | AC | 136 ms
52,280 KB |
testcase_14 | AC | 160 ms
52,336 KB |
testcase_15 | AC | 163 ms
52,332 KB |
testcase_16 | AC | 146 ms
52,296 KB |
testcase_17 | AC | 128 ms
52,456 KB |
testcase_18 | AC | 169 ms
52,256 KB |
testcase_19 | AC | 169 ms
52,352 KB |
testcase_20 | AC | 170 ms
52,448 KB |
testcase_21 | AC | 170 ms
52,368 KB |
testcase_22 | AC | 171 ms
52,272 KB |
testcase_23 | AC | 167 ms
52,320 KB |
testcase_24 | AC | 168 ms
52,092 KB |
testcase_25 | AC | 168 ms
52,360 KB |
testcase_26 | AC | 171 ms
52,084 KB |
testcase_27 | AC | 170 ms
52,252 KB |
testcase_28 | AC | 168 ms
52,188 KB |
ソースコード
import java.util.*; import java.io.*; public class Main { static long mod = 1000000007; static long INF = 1000000000000L; static int size = 600000; static long[] fac = new long[size]; static long[] finv = new long[size]; static long[] inv = new long[size]; public static void main(String[] args){ FastScanner scanner = new FastScanner(); int a = scanner.nextInt(); int b = scanner.nextInt(); int c = scanner.nextInt(); initComb(); long ans = 0; for(int i = 1; i <= a; i++){ long p = 0; long q = 0; p = comb(a+b+c-i-2,c-1)%mod*comb(a+b-i-1,b-1); p %= mod; q = pow(2,a+b+c-i-1)-1; ans += p*q%mod; ans %= mod; } System.out.println(ans); } 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]; } 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 } } 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());} } }