Compilare: main.cpp: In function 'll getVal(std::__cxx11::string)': main.cpp:119:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s.size(); i++){ ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:185:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i + 1 < s.size(); i++){ ~~~~~~^~~~~~~~~~ main.cpp:188:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s.size(); i++){ ~~^~~~~~~~~~ main.cpp:190:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i; j < s.size(); j++){ ~~^~~~~~~~~~ main.cpp:180:51: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("infinitepatternmatching.in", "r", stdin); ^ main.cpp:181:53: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("infinitepatternmatching.out", "w", stdout); ^