Compilare: main.cpp: In function 'int main()': main.cpp:133:30: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=] printf("%d\n", ans.size()); ^ main.cpp: In instantiation of 'bool longestIncreasingSubsequence<T>::getLIS(std::vector<_Tp>&) [with T = int]': main.cpp:132:19: required from here main.cpp:91:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1;i<v.size();++i) main.cpp:104:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<v.size();++i){ main.cpp:120:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("scmax.in","r",stdin); ^ main.cpp:121:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("scmax.out","w",stdout); ^ main.cpp:122:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:128:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ main.cpp: In member function 'bool longestIncreasingSubsequence<T>::getLIS(std::vector<_Tp>&) [with T = int]': main.cpp:110:13: warning: 'pos' may be used uninitialized in this function [-Wmaybe-uninitialized] pos = lst[pos]; ^~~