Compilare: user.cpp:5:23: warning: integer constant is so large that it is unsigned const long long INF = 10000000000000000000LL; ^~~~~~~~~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:21:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%lld%lld%lld", &k, &n, &m); ^ user.cpp:22:76: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(long long i = 1; i <= k; i++) fscanf(fi,"%lld", &x), V.push_back(x); ^ user.cpp:26:54: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%lld%lld%lld%lld", &a, &b, &c, &d); ^