View Compilation Error

0_0_37755286_19231.cpp: In function 'int main()':
0_0_37755286_19231.cpp:12:3: error: 'cin' was not declared in this scope
   cin>>w[i]>>v[i];
   ^
0_0_37755286_19231.cpp:14:2: error: 'cin' was not declared in this scope
  cin>>m;
  ^