Compilare: user.cpp: In function ‘int main()’: user.cpp:108:72: warning: statement has no effect [-Wunused-value] eprintf("TIME = %.3f\n",(double)(clock() - start) / CLOCKS_PER_SEC); ^ user.cpp:80:9: warning: unused variable ‘start’ [-Wunused-variable] int start = clock(); ^ user.cpp:60:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rama.in","r",stdin); ^ user.cpp:61:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rama.out","w",stdout); ^ user.cpp: In function ‘int read()’: user.cpp:42:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] inline int read(){int x;scanf(" %d",&x);return x;} ^