Compilare: user.cpp: In function ‘void Read()’: user.cpp:44:14: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] fin >> S + 1; ^ user.cpp:51:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < strlen(P) ; ++i) ^ user.cpp: In function ‘int main()’: user.cpp:71:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = N + 1; i <= strlen(S + 1) ; ++i) { ^