Compilare: user.cpp: In function ‘int main()’: user.cpp:8:9: warning: unused variable ‘lung’ [-Wunused-variable] int lung[100001], l[100001], i, k = 0, ok = 0, ll, kk = 0; ^ user.cpp:8:34: warning: unused variable ‘i’ [-Wunused-variable] int lung[100001], l[100001], i, k = 0, ok = 0, ll, kk = 0; ^ user.cpp:8:52: warning: unused variable ‘ll’ [-Wunused-variable] int lung[100001], l[100001], i, k = 0, ok = 0, ll, kk = 0; ^ user.cpp:13:27: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(&c, 1, 1, f); ^ user.cpp:19:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(&c, 1, 1, f); ^ user.cpp:28:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(&c, 1, 1, f); ^ user.cpp:52:27: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(&c, 1, 1, f); ^ user.cpp:55:42: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(&auxx, l[kk] + 1, 1, f); ^ user.cpp:60:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(&c, 1, 1, f); ^ user.cpp:69:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(&c, 1, 1, f); ^ user.cpp:78:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(&c, 1, 1, f); ^