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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 vis[100000];
  10. int st[100000];
  11. int sts;
  12. class Solution{
  13.   public:
  14.   bool canReach(vector<int>& A, int s){
  15.     int i;
  16.     int j;
  17.     int N = A.size();
  18.     for(i=(0);i<(N);i++){
  19.       vis[i] = 0;
  20.     }
  21.     sts = 0;
  22.     vis[s] = 1;
  23.     st[sts++] = s;
  24.     while(sts){
  25.       int d;
  26.       i = st[--sts];
  27.       if(A[i]==0){
  28.         return true;
  29.       }
  30.       for(d=(0);d<(2);d++){
  31.         if(d){
  32.           j = i +A[i];
  33.         }
  34.         else{
  35.           j = i -A[i];
  36.         }
  37.         if(j < 0 || j >= N){
  38.           continue;
  39.         }
  40.         if(vis[j]==0){
  41.           vis[j] = 1;
  42.           st[sts++] = j;
  43.         }
  44.       }
  45.     }
  46.     return false;
  47.   }
  48. }
  49. ;
  50. // cLay varsion 20200214-1
  51.  
  52. // --- original code ---
  53. // #define main dummy_main
  54. // {}
  55. // #undef main
  56. // 
  57. // int vis[1d5], st[1d5], sts;
  58. // 
  59. // class Solution {
  60. // public:
  61. //   bool canReach(vector<int>& A, int s) {
  62. //     int i, j, N = A.size();
  63. //     rep(i,N) vis[i] = 0;
  64. //     sts = 0;
  65. //     vis[s] = 1;
  66. //     st[sts++] = s;
  67. //     while(sts){
  68. //       i = st[--sts];
  69. //       if(A[i]==0) return true;
  70. //       rep(d,2){
  71. //         j = i if[d, +, -] A[i];
  72. //         if(j < 0 || j >= N) continue;
  73. //         if(vis[j]==0) vis[j] = 1, st[sts++] = j;
  74. //       }
  75. //     }
  76. //     return false;
  77. //   }
  78. // };
  79.  
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/vj9Wov
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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