Compilare: main.cpp: In function 'int main()': main.cpp:19:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s.size();i++){ ~^~~~~~~~~ main.cpp:49:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=i+2;j<s.size()-1;j++){ ~^~~~~~~~~~~ main.cpp:62:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=i+3;j<s.size()-1;j++){ ~^~~~~~~~~~~ main.cpp:10:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("aranjare.in", "r", stdin); ^ main.cpp:11:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("aranjare.out", "w", stdout); ^