radio.cpp:1:26: bits/stdc++.h: No such file or directory radio.cpp: In function `int main()': radio.cpp:8: `cin' undeclared (first use this function) radio.cpp:8: (Each undeclared identifier is reported only once for each function it appears in.) radio.cpp:10: `sort' undeclared (first use this function) radio.cpp:11: `cout' undeclared (first use this function)