Compilare: main.cpp: In function 'int lcp(int, int)': main.cpp:39:11: warning: unused variable 'i1' [-Wunused-variable] int l,i1,j1; ^~ main.cpp:39:14: warning: unused variable 'j1' [-Wunused-variable] int l,i1,j1; ^~ main.cpp: In function 'int main()': main.cpp:98:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<sol.size(); i++) ~^~~~~~~~~~~ main.cpp:52:39: 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:53:41: 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); ^ main.cpp:55:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s1); ^ main.cpp:56:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s); ^