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  1. #pragma GCC optimize ("Ofast")
  2. #include<bits/stdc++.h>
  3. using namespace std;
  4. template<class S, class T> inline S divup_L(S a, T b){
  5.   return (a+b-1)/b;
  6. }
  7. #define main dummy_main
  8. int main(){
  9.   return 0;
  10. }
  11. #undef main
  12. class Solution{
  13.   public:
  14.   int minimumSwap(string s1, string s2){
  15.     int i;
  16.     int N = s1.size();
  17.     int xy = 0;
  18.     int yx = 0;
  19.     for(i=(0);i<(N);i++){
  20.       if(s1[i] == 'x' && s2[i] == 'y'){
  21.         xy++;
  22.       }
  23.       if(s1[i] == 'y' && s2[i] == 'x'){
  24.         yx++;
  25.       }
  26.     }
  27.     if((xy + yx) % 2){
  28.       return -1;
  29.     }
  30.     return (divup_L(xy,2)) + (divup_L(yx,2));
  31.   }
  32. }
  33. ;
  34. // cLay varsion 20191102-1
  35.  
  36. // --- original code ---
  37. // #define main dummy_main
  38. // {}
  39. // #undef main
  40. // 
  41. // class Solution {
  42. // public:
  43. //   int minimumSwap(string s1, string s2) {
  44. //     int N = s1.size(), xy = 0, yx = 0;
  45. //     rep(i,N){
  46. //       if(s1[i] == 'x' && s2[i] == 'y') xy++;
  47. //       if(s1[i] == 'y' && s2[i] == 'x') yx++;
  48. //     }
  49. //     if((xy + yx) % 2) return -1;
  50. //     return (xy /+ 2) + (yx /+ 2);
  51. //   }
  52. // };
  53.  
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/8/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x20): undefined reference to `main'
collect2: error: ld returned 1 exit status
stdout
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Standard output is empty
https://ideone.com/hQbNcb
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
secret

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