View Compilation Error

0_0_16041568_8667.cpp: In function 'int main()':
0_0_16041568_8667.cpp:25:18: error: 's' was not declared in this scope
    for(j=1;j<l2&&s[j]==s[j-1];j++);
                  ^
0_0_16041568_8667.cpp:26:18: error: 's' was not declared in this scope
    for(i=1;i<l1&&s[i]==s[i-1];i++);
                  ^