View Compilation Error

0_0_21656758_17191.cpp: In function 'int main()':
0_0_21656758_17191.cpp:9:16: error: expected initializer before '<=' token
   for(int i=3,i<=n;i++){
                ^
0_0_21656758_17191.cpp:9:16: error: expected ';' before '<=' token
0_0_21656758_17191.cpp:9:16: error: expected primary-expression before '<=' token
0_0_21656758_17191.cpp:10:6: error: 's' was not declared in this scope
      s[i]=(i-1)*(s[i-1]+s[i-2]);
      ^
0_0_21656758_17191.cpp:12:19: error: 's' was not declared in this scope
   printf("%lld\n",s[n]);
                   ^
0_0_21656758_17191.cpp:14:1: error: expected '}' at end of input
 }
 ^