View Compilation Error

0_0_39428648_15469.cpp: In function 'void solution()':
0_0_39428648_15469.cpp:6:5: error: 'll' was not declared in this scope
    6 |     ll a = 0, b = 0;
      |     ^~
0_0_39428648_15469.cpp:7:7: error: expected ';' before 'x'
    7 |     ll x, y;
      |       ^~
      |       ;
0_0_39428648_15469.cpp:11:28: error: 'x' was not declared in this scope
   11 |         scanf("%lld%lld", &x, &y);
      |                            ^
0_0_39428648_15469.cpp:11:32: error: 'y' was not declared in this scope
   11 |         scanf("%lld%lld", &x, &y);
      |                                ^
0_0_39428648_15469.cpp:19:13: error: 'a' was not declared in this scope
   19 |             a += y -1;//简化成1*n或者n*1
      |             ^
0_0_39428648_15469.cpp:21:13: error: 'b' was not declared in this scope
   21 |             b += x - 1;
      |             ^
0_0_39428648_15469.cpp:23:12: error: 'b' was not declared in this scope
   23 |     if(a < b)
      |            ^
0_0_39428648_15469.cpp:23:8: error: 'a' was not declared in this scope
   23 |     if(a < b)
      |        ^