Compilare: main.cpp: In function 'int main()': main.cpp:8:24: warning: variable 'n' set but not used [-Wunused-but-set-variable] int open=0,close=0,n; ^ main.cpp:6:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("par.in","r",stdin); ^ main.cpp:7:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("par.out","w",stdout); ^