Compilare: user.cpp: In function ‘int count(unsigned int)’: user.cpp:20:19: warning: unused variable ‘sum’ [-Wunused-variable] {unsigned int sum = 0, groups = (n >> 5); ^ user.cpp:20:28: warning: unused variable ‘groups’ [-Wunused-variable] {unsigned int sum = 0, groups = (n >> 5); ^ user.cpp: In function ‘int main()’: user.cpp:30:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("triplete.in", "r", stdin); ^ user.cpp:31:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("triplete.out", "w", stdout); ^ user.cpp:32:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:35:47: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &edge[i].u, &edge[i].v); ^