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  1. #pragma GCC optimize ("Ofast")
  2. #include<bits/stdc++.h>
  3. using namespace std;
  4. #define main dummy_main
  5. int main(){
  6.   return 0;
  7. }
  8. #undef main
  9. int sm[100000];
  10. class Solution{
  11.   public:
  12.   int waysToMakeFair(vector<int>& A){
  13.     int i;
  14.     int N = A.size();
  15.     int res = 0;
  16.     int tmp;
  17.     int Lj4PdHRW;
  18.     int KL2GvlyY;
  19.     if(N==0){
  20.       KL2GvlyY = 0;
  21.     }
  22.     else{
  23.       KL2GvlyY = A[0];
  24.       for(Lj4PdHRW=(1);Lj4PdHRW<(N);Lj4PdHRW++){
  25.         KL2GvlyY += A[Lj4PdHRW];
  26.       }
  27.     }
  28.     int tot = KL2GvlyY;
  29.     for(i=(0);i<(N);i++){
  30.       if(i>=2){
  31.         sm[i] = A[i] +sm[i-2];
  32.       }
  33.       else{
  34.         sm[i] = A[i] +0;
  35.       }
  36.     }
  37.     for(i=(0);i<(N);i++){
  38.       tmp = -sm[i];
  39.       if(i){
  40.         tmp += sm[i-1];
  41.       }
  42.       if((N-1)%2==i%2){
  43.         tmp +=sm[N-1];
  44.       }
  45.       else{
  46.         tmp +=sm[N-2];
  47.       }
  48.       if(2*tmp == tot-A[i]){
  49.         res++;
  50.       }
  51.     }
  52.     return res;
  53.   }
  54. }
  55. ;
  56. // cLay version 20201121-1
  57.  
  58. // --- original code ---
  59. // #define main dummy_main
  60. // {}
  61. // #undef main
  62. // 
  63. // int sm[1d5];
  64. // class Solution {
  65. // public:
  66. //   int waysToMakeFair(vector<int>& A) {
  67. //     int N = A.size(), res = 0, tmp, tot = sum(A(N));
  68. //     rep(i,N) sm[i] = A[i] + if[i>=2, sm[i-2], 0];
  69. //     rep(i,N){
  70. //       tmp = -sm[i];
  71. //       if(i) tmp += sm[i-1];
  72. //       tmp += if[(N-1)%2==i%2, sm[N-1], sm[N-2]];
  73. //       if(2*tmp == tot-A[i]) res++;
  74. //     }
  75. //     return res;
  76. //   }
  77. // };
  78.  
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/BeIpNK
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
secret

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