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  1. #include<iostream> 
  2. #include<cstdio> 
  3. #include<vector> 
  4. #include<bits/stdc++.h>
  5. using namespace std;
  6. int Length(string s)
  7.  { 
  8. int len = 0; 
  9. for(int i=0;s[i]!='\0';i++) 
  10. { 
  11. len++; 
  12. } 
  13. return len;
  14.  } 
  15.  
  16. vector <int> SubStringFind(string s, string sub) 
  17. {
  18.  int lens = Length(s);
  19.  int lensub = Length(sub);
  20.  vector <int> pos; 
  21. int paisi = 0; 
  22. for(int i=0;i<=lens-lensub;i++)
  23.  {
  24.  int matched = 0; 
  25. for(int j=0;j<lensub;j++) 
  26. { 
  27. if(sub[j] == s[i+j]) 
  28. {
  29.  matched++; 
  30. continue; 
  31. }
  32.  else
  33.  break; 
  34. } 
  35. if(matched == lensub) 
  36. { 
  37. pos.push_back(i);
  38.  }
  39.  } 
  40. return pos;
  41.  }
  42.  string Delete(string s, string sub) 
  43. { 
  44. int lens = Length(s); 
  45. int lensub = Length(sub);
  46.  vector <int> pos; 
  47. pos = SubStringFind(s,sub);
  48.  string res = ""; 
  49. int kototomo = 0;
  50.  for(int i=0;i<lens;i++)
  51.  {
  52.  if(kototomo > pos.size() || i != pos[kototomo])
  53.  {
  54.  res = res + s[i]; 
  55. }
  56.  else
  57.  { 
  58. i+= (lensub-1); 
  59. kototomo++; 
  60. }
  61.  }
  62.  return res;
  63.  }
  64.  string InsertAtPos(string s, int pos, string sub) { 
  65. string res = "";
  66.  int lens = Length(s);
  67.  int lensub = Length(sub); 
  68. for(int i=0;i<pos;i++)
  69.  {
  70.  res = res + s[i]; 
  71. } 
  72. res = res + sub;
  73.  for(int i=pos;i<lens;i++) 
  74. {
  75.  res = res + s[i]; 
  76. }
  77.  return res; 
  78. } 
  79. string Replace(string s, string sub1, string sub2) {
  80.  int lens = Length(s); 
  81. int lensub1 = Length(sub1); 
  82. int lensub2 = Length(sub2); 
  83. vector <int> pos; 
  84. pos = SubStringFind(s,sub1);
  85.  string res;
  86.  res = Delete(s,sub1);
  87.  for(int i=0;i<pos.size();i++)
  88.  {
  89.  res = InsertAtPos(res,pos[i]+(i*(lensub2-lensub1)),sub2); 
  90. } 
  91. return res; 
  92. }
  93.  int main()
  94.  {
  95.  vector <int> kothay; 
  96. string s,sub1,sub2; 
  97. int pos;
  98.  cin>>s>>sub1>>sub2; 
  99. string res = Replace(s,sub1,sub2); 
  100. cout<<res;
  101.  return 0;
  102.  }
Success #stdin #stdout 0.01s 5268KB
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https://ideone.com/jf26dT
language:
C++ (gcc 8.3)
created:
28 days ago
visibility:
public

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