Compilare: user.cpp: In function ‘int main()’: user.cpp:71:15: warning: unused variable ‘sum’ [-Wunused-variable] long long sum = 0; ^ user.cpp:72:9: warning: unused variable ‘mx’ [-Wunused-variable] int mx = -N; ^ user.cpp:68:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("teamwork.out", "w", stdout); ^ user.cpp:69:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("teamwork.in", "r", stdin); ^ user.cpp:73:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:75:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^