View Compilation Error

0_0_32349807_20512.cpp: In function 'int main()':
0_0_32349807_20512.cpp:62:45: error: expected ')' before ';' token
             for(ll l = 3,r;l <= n; l = r + 1;){
                                             ^
0_0_32349807_20512.cpp:62:46: error: expected primary-expression before ')' token
             for(ll l = 3,r;l <= n; l = r + 1;){
                                              ^