View Compilation Error

0_0_33303789_20663.cpp: In function 'bool solve(ll, ll, ll, int)':
0_0_33303789_20663.cpp:54:9: error: 'else' without a previous 'if'
         else 
         ^
0_0_33303789_20663.cpp: At global scope:
0_0_33303789_20663.cpp:67:1: error: expected declaration before '}' token
 }
 ^