View Compilation Error

0_0_22381712_225.cpp: In function 'int solve(int, int)':
0_0_22381712_225.cpp:30:12: error: expected unqualified-id before '=' token
       int  = x, R = y, ans = -1;
            ^
0_0_22381712_225.cpp:31:12: error: 'L' was not declared in this scope
     while (L <= R) {
            ^
0_0_22381712_225.cpp:31:17: error: 'R' was not declared in this scope
     while (L <= R) {
                 ^
0_0_22381712_225.cpp:36:15: error: 'ans' was not declared in this scope
               ans = M;
               ^
0_0_22381712_225.cpp:40:9: error: 'ans' was not declared in this scope
     if (ans == -1) return y - x + 1;
         ^
0_0_22381712_225.cpp:41:16: error: 'ans' was not declared in this scope
     return max(ans - x, RMQ(ans, y));
                ^