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  1. //6 1
  2. //police
  3. //p m
  4.  
  5. //11 6
  6. //abacabadaba
  7. //a b
  8. //b c
  9. //a d
  10. //e g
  11. //f a
  12. //b b
  13. #include<bits/stdc++.h>
  14. int st[26][200000]={},tempst[200000],top[26]={};
  15. char a[200001];
  16. int main()
  17. {
  18.     int n,m,i,v,j,top1,top2,v2;
  19.     char b,c;
  20.     scanf("%d%d",&n,&m);
  21.     fflush(stdin);
  22.     gets(a);
  23.     //scanf("%s",a);
  24.     for(i=0;i<n;i++)
  25.     {
  26.         //scanf("%c",&a[i]);
  27.         if(a[i]==' ') continue;
  28.         v=a[i]-'a';
  29.         st[v][top[v]]=i;
  30.         top[v]++;
  31.     }
  32.     for(i=0;i<m;i++)
  33.     {
  34.         fflush(stdin);
  35.         scanf("%c %c",&b,&c);
  36.         //printf("%c %c\n",b,c);
  37.         v=b-'a';
  38.         for(j=0;j<top[v];j++) a[st[v][j]]=c;
  39.         v=c-'a';
  40.         for(j=0;j<top[v];j++) a[st[v][j]]=b;
  41.         v=b-'a';
  42.         top1=top[v];
  43.         for(j=0;j<top1;j++) tempst[j]=st[v][j];
  44.         v2=c-'a';
  45.         top2=top[v2];
  46.         for(j=0;j<top2;j++) st[v][j]=st[v2][j];
  47.         for(j=0;j<top1;j++) st[v2][j]=tempst[j];
  48.         top[v]=top2;
  49.         top[v2]=top1;
  50.     }
  51.     printf("%s",a);
  52.     return 0;
  53. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.cpp: In function 'int main()':
prog.cpp:22:11: error: 'gets' was not declared in this scope
     gets(a);
           ^
stdout
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Standard output is empty
https://ideone.com/cy83S0
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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