Compilare: main.cpp: In function 'int main()': main.cpp:7:29: 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:8:31: 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:10:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:15:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ main.cpp:18:29: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized] sum=s[i]-m,front=j+1,last=i; ~~~~~^~~~