Compilare: main.cpp: In function 'bool OK(int)': main.cpp:16:25: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 16 | for(int i=0; i+len-1<strlen(s[id]); i++) | ~~~~~~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:38:24: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 38 | if(strlen(s[i])<len) | ~~~~~~~~~~~~^~~~ main.cpp:57:13: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized] 57 | fout << ans; | ^~~