Compilare: user.cpp: In function ‘int main()’: user.cpp:64:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(LIS(j - 1, val) >= deq[i].size()) ^ user.cpp:42:15: warning: unused variable ‘attempt’ [-Wunused-variable] int i, j, attempt, val, valmax; ^ user.cpp:40:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("blis.in", "r", stdin); ^ user.cpp:41:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("blis.out", "w", stdout); ^ user.cpp:45:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n%s", &k, str + 1); ^ user.cpp:42:29: warning: ‘valmax’ may be used uninitialized in this function [-Wmaybe-uninitialized] int i, j, attempt, val, valmax; ^