Compilare: user.cpp: In function ‘void read()’: user.cpp:22:9: warning: unused variable ‘x’ [-Wunused-variable] int x, y; ^ user.cpp:22:12: warning: unused variable ‘y’ [-Wunused-variable] int x, y; ^ user.cpp:21:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d\n", &n, &s, &t); ^ user.cpp:25:56: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &vec[i].first, &vec[i].second); ^ user.cpp: In function ‘int main()’: user.cpp:62:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("branza.in", "r", stdin); ^ user.cpp:63:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("branza.out", "w", stdout); ^