Compilare: user.cpp: In function ‘void Try()’: user.cpp:46:9: warning: unused variable ‘i’ [-Wunused-variable] int i,pos,kth,f,st,dr,mid; ^ user.cpp:46:11: warning: unused variable ‘pos’ [-Wunused-variable] int i,pos,kth,f,st,dr,mid; ^~~ user.cpp:47:11: warning: unused variable ‘dr0’ [-Wunused-variable] int64 dr0,dr1; ^~~ user.cpp:47:15: warning: unused variable ‘dr1’ [-Wunused-variable] int64 dr0,dr1; ^~~ user.cpp: In function ‘int main()’: user.cpp:67:21: warning: unused variable ‘cnt’ [-Wunused-variable] int i,st,dr,mid,cnt,nr0,nrr0,lim; ^~~ user.cpp:64:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("copii3.in","r",stdin); ^ user.cpp:65:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("copii3.out","w",stdout); ^ user.cpp:70:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&N,&Q); ^ user.cpp:71:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",str); ^ user.cpp:90:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&L,&R); ^ user.cpp: In function ‘void Try()’: user.cpp:60:27: 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])); ~~~~~~~^