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 ‘short int cauta(int)’: user.cpp:17:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<H[r].size();++i) ^ user.cpp:18:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (H[r][i].l==x) return i; ^ user.cpp: In function ‘int sterge(int)’: user.cpp:42:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (X.l==x) ^ user.cpp:35:9: warning: unused variable ‘ok’ [-Wunused-variable] int ok=0,i=0; ^ user.cpp:36:9: warning: unused variable ‘k’ [-Wunused-variable] int k=0; ^ user.cpp: In function ‘long long int sol(unsigned int)’: user.cpp:63:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(nr>x) ^ user.cpp: In function ‘int main()’: user.cpp:75:34: 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:76:36: 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:77:29: 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:79:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%u",&v[i]); ^