Compilare: user.cpp: In function ‘long long int Qnt(int)’: user.cpp:23:9: warning: unused variable ‘i’ [-Wunused-variable] int i,a,st,dr,mid,b,kth; ^ user.cpp: In function ‘void Try()’: user.cpp:66:9: warning: unused variable ‘i’ [-Wunused-variable] int i,pos,kth,f,st,dr,mid; ^ user.cpp:66:11: warning: unused variable ‘pos’ [-Wunused-variable] int i,pos,kth,f,st,dr,mid; ^~~ user.cpp:67:11: warning: unused variable ‘dr0’ [-Wunused-variable] int64 dr0,dr1; ^~~ user.cpp:67:15: warning: unused variable ‘dr1’ [-Wunused-variable] int64 dr0,dr1; ^~~ user.cpp: In function ‘int main()’: user.cpp:140:21: warning: unused variable ‘cnt’ [-Wunused-variable] int i,st,dr,mid,cnt,nr0,nrr0,lim; ^~~ user.cpp: In function ‘void Read(int&)’: user.cpp:93:56: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if (++poz == DIM) fread(buff, 1, DIM, fin), poz = 0; ^ user.cpp:97:60: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if (++poz == DIM) fread(buff, 1, DIM, fin), poz = 0; ^ user.cpp: In function ‘int main()’: user.cpp:143:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&N,&Q); ^ user.cpp:144:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%s",str); ^ user.cpp: In function ‘long long int Qnt(int)’: user.cpp:61:31: warning: ‘b’ may be used uninitialized in this function [-Wmaybe-uninitialized] return st1 - st0 + (b > 0 ? dr0 - dr1 : 0); ~~~~~~~^~~~~~~~~~~~~~~~ user.cpp:52:31: warning: ‘a’ may be used uninitialized in this function [-Wmaybe-uninitialized] st0 = sum_0[L-1] - sum_0[a-1]; ~^~ user.cpp: In function ‘void Try()’: user.cpp:80:27: warning: ‘f’ may be used uninitialized in this function [-Wmaybe-uninitialized] res = min(res, sum_0[f] - sum_0[R] - (sum_1[R] - sum_1[L-1])); ~~~~~~~^