Compilare: main.cpp: In function 'int main()': main.cpp:38:30: 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", sol.size()); ^ main.cpp:39:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<1000 && i<sol.size(); i++) ~^~~~~~~~~~~ main.cpp:11:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("strmatch.in", "r",stdin); ^ main.cpp:12:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.out", "w",stdout); ^