Compilare: user.cpp: In function ‘long long int start(int, int)’: user.cpp:17:23: warning: unused variable ‘k’ [-Wunused-variable] long long V=1, E, k=0; ^ user.cpp: In function ‘int main()’: user.cpp:41:18: warning: unused variable ‘k’ [-Wunused-variable] int T, N, R, k=0, nr=1, i, j; ^ user.cpp:41:23: warning: unused variable ‘nr’ [-Wunused-variable] int T, N, R, k=0, nr=1, i, j; ^ user.cpp:41:29: warning: unused variable ‘i’ [-Wunused-variable] int T, N, R, k=0, nr=1, i, j; ^ user.cpp:41:32: warning: unused variable ‘j’ [-Wunused-variable] int T, N, R, k=0, nr=1, i, j; ^ user.cpp:42:15: warning: unused variable ‘V’ [-Wunused-variable] long long V; ^ user.cpp:43:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("progresie.in","r",stdin); ^ user.cpp:44:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("progresie.out","w",stdout); ^ user.cpp:45:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&T); ^ user.cpp:48:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&N,&R); ^