Compilare: main.cpp: In function 'int main()': main.cpp:42:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ssm.in","r",stdin); ^ main.cpp:43:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ssm.out","w",stdout); ^ main.cpp:44:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:48:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ main.cpp:54:38: warning: 'len' may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<ans<<' '<<start<<' '<<start+len-1<<'\n'; ~~~~~^~~~ main.cpp:54:38: warning: 'start' may be used uninitialized in this function [-Wmaybe-uninitialized]