Compilare: user.cpp: In function ‘int main()’: user.cpp:22:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= c[0] ; ++i){ ^ user.cpp:47:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= b[0] ; ++i){ ^ user.cpp:64:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= a[0] ; ++i){ ^ user.cpp:79:26: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long unsigned int’ [-Wformat=] printf("%d", a[i]); ^ user.cpp:8:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tort.in", "r", stdin); ^ user.cpp:9:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tort.out", "w", stdout); ^ user.cpp:10:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld", &n, &m); ^