Compilare: user.cpp: In function ‘void solve()’: user.cpp:133:9: warning: unused variable ‘st2’ [-Wunused-variable] int st2 = 1, dr2 = 0; ^ user.cpp:133:18: warning: unused variable ‘dr2’ [-Wunused-variable] int st2 = 1, dr2 = 0; ^ user.cpp:134:9: warning: unused variable ‘elem2’ [-Wunused-variable] int elem2 = 0; ^ user.cpp: In function ‘void readFile()’: user.cpp:84:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d%d", &n, &m, &k); ^ user.cpp:85:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &start, &fin); ^ user.cpp:96:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d%d", &l, &c, &r); ^ user.cpp:97:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &t, &d); ^