Compilare: main.cpp: In function 'int main()': main.cpp:91:11: warning: unused variable 'i' [-Wunused-variable] int n,i,sol=0; ^ main.cpp:89:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("leduri.in","r",stdin); ^ main.cpp:90:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("leduri.out","w",stdout); ^ main.cpp:92:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp: In member function 'void bin::read(int)': main.cpp:14:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^