Main.cc: In function ‘int main()’: Main.cc:13:2: error: ‘cin’ was not declared in this scope cin >> m >> n; ^~~ Main.cc:13:2: note: suggested alternative: ‘sin’ cin >> m >> n; ^~~ sin Main.cc:21:2: error: ‘cout’ was not declared in this scope cout << dp[m]; ^~~~ Main.cc:21:2: note: suggested alternative: ‘cosl’ cout << dp[m]; ^~~~ cosl