View Compilation Error

0_0_36966195_9381.cpp: In function 'int main()':
0_0_36966195_9381.cpp:57:13: error: 'w' was not declared in this scope
     ans=1.0*w[i]/(w[i]+l[i]);
             ^
0_0_36966195_9381.cpp:57:24: error: 'l' was not declared in this scope
     ans=1.0*w[i]/(w[i]+l[i]);
                        ^