Compilare: main.cpp: In function 'int main()': main.cpp:9:45: warning: unused variable 'z' [-Wunused-variable] unsigned long long int x,y,con,c=0,xc,i,z,last,sum; ^ main.cpp:9:52: warning: variable 'sum' set but not used [-Wunused-but-set-variable] unsigned long long int x,y,con,c=0,xc,i,z,last,sum; ^~~ 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("bazaf.in","r",stdin); ^ main.cpp:8:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bazaf.out","w",stdout); ^ main.cpp:10:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%llu",&x); ^ main.cpp:13:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%llu",&y); ^ main.cpp:39:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%llu",&c); ^ main.cpp:42:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%llu",&w[i]); ^