Compilare: user.cpp: In function ‘int main()’: user.cpp:16:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d%d",&n,&x,&y); ^ user.cpp:19:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d", &sum[i]); ^ user.cpp:15:34: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] int n, x, y, st = 1, dr = 0, sol; ^