View Compilation Error

0_0_25450707_26144.cpp: In function 'int main()':
0_0_25450707_26144.cpp:10:11: error: 'cin' was not declared in this scope
     while(cin>>n>>m) {
           ^
0_0_25450707_26144.cpp:20:22: error: 'cout' was not declared in this scope
         if(sum <= m){cout<<sum<<endl;continue;}
                      ^
0_0_25450707_26144.cpp:20:33: error: 'endl' was not declared in this scope
         if(sum <= m){cout<<sum<<endl;continue;}
                                 ^
0_0_25450707_26144.cpp:24:9: error: 'cout' was not declared in this scope
         cout<<maxn<<endl;
         ^
0_0_25450707_26144.cpp:24:21: error: 'endl' was not declared in this scope
         cout<<maxn<<endl;
                     ^