Compilare: user.cpp: In function ‘void readFile()’: user.cpp:34:15: warning: unused variable ‘nr’ [-Wunused-variable] int i, j, nr; ^ user.cpp: In function ‘void solve()’: user.cpp:131:9: warning: unused variable ‘last’ [-Wunused-variable] int last; ^ user.cpp: In function ‘void readFile()’: user.cpp:32:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d\n", &n, &m); ^ user.cpp:37:26: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(s, 1009, f); ^