Source code for submission s602

false_security.cpp

  1. #include <map>
  2. #include <cstdio>
  3. #include <string>
  4. #include <algorithm>
  5. #include <cstdlib>
  6. #include <cstring>
  7.  
  8. using namespace std;
  9.  
  10. string letter_morse[30] = {
  11. 	".-", "-...", "-.-.", "-..", ".", "..-.", "--.",
  12. 	"....", "..", ".---", "-.-", ".-..", "--", "-.",
  13. 	"---", ".--.", "--.-", ".-.", "...", "-", "..-",
  14. 	"...-", ".--", "-..-", "-.--", "--..",
  15. 	"..--", ".-.-", "---.", "----"
  16. };
  17.  
  18. static inline int get_index(char a){
  19. 	if (a >= 'A' && a <= 'Z'){
  20. 		return a - 'A';
  21. 	}
  22. 	switch (a){
  23. 		case '_':
  24. 			return 26;
  25. 		case ',':
  26. 			return 27;
  27. 		case '.':
  28. 			return 28;
  29. 		case '?':
  30. 			return 29;
  31. 	}
  32. }
  33.  
  34. map<string, char> morse_letter;
  35.  
  36. #include <iostream>
  37.  
  38. static inline void init(){
  39. 	for (int i = 0; i < 26; i++){
  40. 		morse_letter[letter_morse[i]] = (i + 'A');
  41. 	}
  42. 	morse_letter[letter_morse[26]] = '_';
  43. 	morse_letter[letter_morse[27]] = ',';
  44. 	morse_letter[letter_morse[28]] = '.';
  45. 	morse_letter[letter_morse[29]] = '?';
  46.  
  47. /*	for (map<string, char>::iterator it = morse_letter.begin();
  48. 		it != morse_letter.end(); ++it){
  49. 			cout << it->first << "  " << it->second << std::endl;
  50. 		}
  51. */	
  52. }
  53.  
  54. #define MAX_LEN 1024
  55.  
  56. int main(){
  57.  
  58. 	init();
  59. //	printf("initing\n");
  60. 	char message_buf[MAX_LEN];
  61. 	int res;
  62. 	char result[MAX_LEN];
  63. 	while (scanf("%s%n%*c", message_buf, &res) != EOF){
  64. //		printf("Read: %s\n", message_buf);
  65. //		printf("Length: %d\n", res);
  66. 		string morse_buf;
  67. 		string len;
  68. 		memset(result, 0, res + 1);
  69. 		for (int i = 0; i < res; i++){
  70. //			int index = get_index(message_buf[i]);
  71. //			printf("Index is: %d\n", index);
  72. 			string& current = letter_morse[get_index(message_buf[i])];
  73. //			printf("morse repre is %s\n", current.c_str());
  74. 			len += (char) (current.size() + '0');
  75. 			morse_buf += current;
  76. 		}
  77. //		printf("len before rev: %s\n", len.c_str());
  78. 		reverse(len.begin(), len.end());
  79. //		printf("len after rev: %s\n", len.c_str());
  80. 		int morse_index = 0;
  81. 		int result_index = 0;
  82. 		for (int j = 0; j < res; j++){
  83. 			int s = len[j] - '0';
  84. //			string substring = string(&morse_buf[morse_index], s);//morse_buf.substr(morse_index, morse_index + s);
  85. //			printf("substr: %s\n", substring.c_str());
  86. 			result[result_index] = morse_letter[string(&morse_buf[morse_index], s)];
  87. //			printf("s: %d\nmorse_index: %d\n result_index: %d\n result: %s\n", s, morse_index, result_index, result);
  88. 			morse_index += s;
  89. 			result_index++;
  90. 		}
  91.  
  92. //		printf("string len is :%d\n", res);
  93. //		printf("before setting null: %s\n", result);
  94. 		result[res] = 0;
  95. 		printf("%s\n", result);
  96.  
  97. 	}
  98. 	return 0;
  99. }
  100.