Compilare: user.cpp:4:15: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] #define NMAX 1<<20+2 ^ user.cpp:7:16: note: in expansion of macro ‘NMAX’ unsigned int v[NMAX]; ^ user.cpp: In function ‘bool cauta(int)’: user.cpp:13:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<H[r].size();++i) ^ user.cpp:14:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (H[r][i]==x) return 1; ^ user.cpp: In function ‘int sterge(int)’: user.cpp:31:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (*it==x && ok==0) ^ user.cpp:38:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (*it==x) return 1; ^ user.cpp:25:14: warning: unused variable ‘i’ [-Wunused-variable] int ok=0,i; ^ user.cpp:26:9: warning: unused variable ‘k’ [-Wunused-variable] int k=0; ^ user.cpp: In function ‘long long int sol(unsigned int)’: user.cpp:54:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(nr>x) ^ user.cpp: In function ‘int main()’: user.cpp:66:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secv5.in","r",stdin); ^ user.cpp:67:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secv5.out","w",stdout); ^ user.cpp:68:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&l,&u); ^ user.cpp:70:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%u",&v[i]); ^