Compilare: user.cpp: In function ‘int main()’: user.cpp:135:23: warning: unused variable ‘con’ [-Wunused-variable] int i, j = 1, con = 0; ^ user.cpp:113:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%lld", &N, &s); ^ user.cpp:115:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%lld", &v[i]); ^