結果

問題 No.3015 アンチローリングハッシュ
ユーザー yuppe19 😺yuppe19 😺
提出日時 2015-11-02 09:39:54
言語 C++11
(gcc 11.4.0)
結果
CE  
(最新)
AC  
(最初)
実行時間 -
コード長 3,489 bytes
コンパイル時間 590 ms
コンパイル使用メモリ 53,040 KB
最終ジャッジ日時 2024-11-14 19:23:56
合計ジャッジ時間 1,301 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge4
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コンパイルエラー時のメッセージ・ソースコードは、提出者また管理者しか表示できないようにしております。（リジャッジ後のコンパイルエラーは公開されます）
ただし、clay言語の場合は開発者のデバッグのため、公開されます。

コンパイルメッセージ
main.cpp:27:6: error: variable or field ‘init_by_array’ declared void
   27 | void init_by_array(vector<unsigned int> init_key) {
      |      ^~~~~~~~~~~~~
main.cpp:27:20: error: ‘vector’ was not declared in this scope
   27 | void init_by_array(vector<unsigned int> init_key) {
      |                    ^~~~~~
main.cpp:4:1: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
    3 | #include <sys/time.h>
  +++ |+#include <vector>
    4 | using namespace std;
main.cpp:27:27: error: expected primary-expression before ‘unsigned’
   27 | void init_by_array(vector<unsigned int> init_key) {
      |                           ^~~~~~~~
main.cpp:84:6: error: variable or field ‘shuffle’ declared void
   84 | void shuffle(vector<T> &v) {
      |      ^~~~~~~
main.cpp:84:14: error: ‘vector’ was not declared in this scope
   84 | void shuffle(vector<T> &v) {
      |              ^~~~~~
main.cpp:84:14: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
main.cpp:84:22: error: expected primary-expression before ‘>’ token
   84 | void shuffle(vector<T> &v) {
      |                      ^
main.cpp:84:25: error: ‘v’ was not declared in this scope
   84 | void shuffle(vector<T> &v) {
      |                         ^
main.cpp: In function ‘int main()’:
main.cpp:113:3: error: ‘vector’ was not declared in this scope
  113 |   vector<unsigned int> init;
      |   ^~~~~~
main.cpp:113:3: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
main.cpp:113:10: error: expected primary-expression before ‘unsigned’
  113 |   vector<unsigned int> init;
      |          ^~~~~~~~
main.cpp:114:3: error: ‘init’ was not declared in this scope; did you mean ‘int’?
  114 |   init.push_back(0x123);
      |   ^~~~
      |   int
main.cpp:120:3: error: ‘init_by_array’ was not declared in this scope
  12

ソースコード

diff # 

#include <iostream>
#include <algorithm>
#include <sys/time.h>
using namespace std;
using u64 = unsigned long long;

class range {private: struct I{int x;int operator*(){return x;}bool operator!=(I& lhs){return x<lhs.x;}void operator++(){++x;}};I i,n;
public:range(int n):i({0}),n({n}){}range(int i,int n):i({i}),n({n}){}I& begin(){return i;}I& end(){return n;}};

const int N = 624;
const int M = 397;
const unsigned int MATRIX_A   = 0x9908b0dfU;
const unsigned int UPPER_MASK = 0x80000000U;
const unsigned int LOWER_MASK = 0x7fffffffU;

static unsigned int mt[N];
static int mti = N + 1;

void init_genrand(unsigned int s) {
  mt[0] = s & 0xffffffffU;
  for(mti=1; mti<N; mti++) {
    mt[mti] = (1812433253U * (mt[mti-1] ^ (mt[mti-1] >> 30)) + mti);
    mt[mti] &= 0xffffffffU;
  }
}

void init_by_array(vector<unsigned int> init_key) {
  int key_length = init_key.size();
  init_genrand(19880731U); // まいぷる
  int i = 1, j = 0;
  int k = N > key_length ? N : key_length;
  for( ; k; k--) {
    mt[i] = (mt[i] ^ ((mt[i-1] ^ (mt[i-1] >> 30)) * 1664525U)) + init_key[j] + j;
    mt[i] &= 0xffffffffU;
    i++; j++;
    if(i >= N) { mt[0] = mt[N-1]; i = 1; }
    if(j >= key_length) { j = 0; }
  }
  for(k=N-1; k; k--) {
    mt[i] = (mt[i] ^ ((mt[i-1] ^ (mt[i-1] >> 30)) * 1566083941U)) - i;
    mt[i] &= 0xffffffffU;
    i++;
    if(i >= N) { mt[0] = mt[N-1]; i = 1; }
  }
  mt[0] = 0x80000000U;
}

unsigned int genrand_int32(void) {
  unsigned int y;
  static unsigned int mag01[2] = {0x0U, MATRIX_A};
  if(mti >= N) {
    if(mti == N + 1) { init_genrand(5489U); }
    int kk;
    for(kk=0; kk<N-M; kk++) {
      y = (mt[kk] & UPPER_MASK) | (mt[kk+1] & LOWER_MASK);
      mt[kk] = mt[kk+M] ^ (y >> 1) ^ mag01[y & 0x1U];
    }
    for(; kk<N-1; kk++) {
      y = (mt[kk] & UPPER_MASK) | (mt[kk+1] & LOWER_MASK);
      mt[kk] = mt[kk+(M-N)] ^ (y >> 1) ^ mag01[y & 0x1U];
    }
    y = (mt[N-1] & UPPER_MASK) | (mt[0] & LOWER_MASK);
    mt[N-1] = mt[M-1] ^ (y >> 1) ^ mag01[y & 0x1U];
    mti = 0;
  }
  y = mt[mti++];
  y ^= (y >> 11);
  y ^= (y << 7) & 0x9d2c5680U;
  y ^= (y << 15) & 0xefc60000U;
  y ^= (y >> 18);
  return y;
}

int genrand_int31(void) {
  return (int)(genrand_int32() >> 1);
}

double genrand_real2(void) {
  return genrand_int32()*(1.0/4294967296.0); 
}

// knuth shuffle
template<class T>
void shuffle(vector<T> &v) {
  int n = v.size();
  for(unsigned int i=n-1; i>=1; --i) {
    unsigned int k = genrand_int32() % (i + 1);
    if(k == i) { continue; }
    swap(v[k], v[i]);
  }
}

unsigned long long get_hash(string s, unsigned long long a, unsigned long long b){
  unsigned long long hash = 0;
  for(int i = 0; i < s.size(); i++){
    hash = (hash * a + s[i]) % b;
  }
  return hash;
}

const string letters = "abcdefghijklmnopqrstuvwxyz";

string generate(int n) {
  string res;
  for(int i : range(n)) {
    res += letters[genrand_int31() % 26];
  }
  return res;
}

int main(void) {
  timeval tval; gettimeofday(&tval, NULL);
  vector<unsigned int> init;
  init.push_back(0x123);
  init.push_back(0x234);
  init.push_back(0x345);
  init.push_back(0x456);
  init.push_back(tval.tv_sec);
  init.push_back(tval.tv_usec);
  init_by_array(init);

  int a, b; scanf("%d%d", &a, &b);
  while(true) {
    int n = genrand_int31() % 10 + 10;
    string s = generate(n);
    string t = generate(n);
    u64 r1 = get_hash(s, a, b),
        r2 = get_hash(t, a, b);
    if(r1 == r2) {
      puts(s.c_str());
      puts(t.c_str());
      break;
    }
  }
  return 0;
}
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