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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 chmin(S &a, T b){
  5.   if(a>b){
  6.     a=b;
  7.   }
  8.   return a;
  9. }
  10. #define main dummy_main
  11. int main(){
  12.   return 0;
  13. }
  14. #undef main
  15. int x;
  16. int y;
  17. int xy;
  18. int arr[3][3];
  19. int dx[5] = {0, -1, 1, 0, 0};
  20. int dy[5] = {0, 0, 0, -1, 1};
  21. class Solution{
  22.   public:
  23.   int minFlips(vector<vector<int>>& mat){
  24.     int mask;
  25.     int i;
  26.     int j;
  27.     int si;
  28.     int sj;
  29.     int d;
  30.     int cnt;
  31.     int res = 1073709056;
  32.     x = mat.size();
  33.     y = mat[0].size();
  34.     xy = x * y;
  35.     for(mask=(0);mask<((1<<xy));mask++){
  36.       cnt = 0;
  37.       for(i=(0);i<(x);i++){
  38.         for(j=(0);j<(y);j++){
  39.           arr[i][j] = mat[i][j];
  40.         }
  41.       }
  42.       for(i=(0);i<(x);i++){
  43.         for(j=(0);j<(y);j++){
  44.           if(mask & (1<<(i*y+j))){
  45.             cnt++;
  46.             for(d=(0);d<(5);d++){
  47.               si = i + dx[d];
  48.               sj = j + dy[d];
  49.               if(0 <= si  &&  si < x && 0 <= sj  &&  sj < y){
  50.                 arr[si][sj] ^= 1;
  51.               }
  52.             }
  53.           }
  54.         }
  55.       }
  56.       for(i=(0);i<(x);i++){
  57.         for(j=(0);j<(y);j++){
  58.           if(arr[i][j]){
  59.             goto Lj4PdHRW;
  60.           }
  61.         }
  62.       }
  63.       chmin(res, cnt);
  64.       Lj4PdHRW:;
  65.     }
  66.     if(res==1073709056){
  67.       res = -1;
  68.     }
  69.     return res;
  70.   }
  71. }
  72. ;
  73. // cLay varsion 20191214-1
  74.  
  75. // --- original code ---
  76. // #define main dummy_main
  77. // {}
  78. // #undef main
  79. // 
  80. // int x, y, xy;
  81. // int arr[3][3];
  82. // int dx[5] = {0, -1, 1, 0, 0};
  83. // int dy[5] = {0, 0, 0, -1, 1};
  84. // 
  85. // class Solution {
  86. // public:
  87. //   int minFlips(vector<vector<int>>& mat) {
  88. //     int i, j, si, sj, d, cnt;
  89. //     int res = int_inf;
  90. // 
  91. //     x = mat.size();
  92. //     y = mat[0].size();
  93. //     xy = x * y;
  94. // 
  95. //     rep(mask,(1<<xy)){
  96. //       cnt = 0;
  97. //       rep(i,x) rep(j,y) arr[i][j] = mat[i][j];
  98. //       rep(i,x) rep(j,y) if(mask & (1<<(i*y+j))){
  99. //         cnt++;
  100. //         rep(d,5){
  101. //           si = i + dx[d];
  102. //           sj = j + dy[d];
  103. //           if(0 <= si < x && 0 <= sj < y) arr[si][sj] ^= 1;
  104. //         }
  105. //       }
  106. //       rep(i,x) rep(j,y) if(arr[i][j]) break_break_continue;
  107. //       res <?= cnt;
  108. //     }
  109. //     if(res==int_inf) res = -1;
  110. //     return res;
  111. //   }
  112. // };
  113.  
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/swr8zF
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
secret

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