View Compilation Error

0_0_21447471_8425.cpp: In function 'll solve(int)':
0_0_21447471_8425.cpp:20:27: error: expected primary-expression at end of input
     for (int i = x; i <= n;
                           ^
0_0_21447471_8425.cpp:20:27: error: expected ')' at end of input
0_0_21447471_8425.cpp:20:27: error: expected statement at end of input
0_0_21447471_8425.cpp:20:27: error: expected '}' at end of input