Eroare de compilare: main.cpp: In function 'int main()': main.cpp:44:5: error: 'cin' was not declared in this scope cin >> N; ^~~ main.cpp:39:9: warning: unused variable 'op' [-Wunused-variable] int op, x; ^~ main.cpp:39:13: warning: unused variable 'x' [-Wunused-variable] int op, x; ^ main.cpp:41:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.in", "r", stdin); ^ main.cpp:42:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.out", "w", stdout); ^ Non zero exit status: 1