View Compilation Error

0_0_24879059_19847.cpp: In function 'int main()':
0_0_24879059_19847.cpp:36:4: error: 'cout' was not declared in this scope
    cout << start << " ";
    ^
0_0_24879059_19847.cpp:52:34: error: 'endl' was not declared in this scope
    cout << leave - p[start - 1]<<endl;
                                  ^