Compilare: user.cpp: In function ‘void getDp()’: user.cpp:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i <= a.size(); i ++) ~~^~~~~~~~~~~ user.cpp:16:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j <= s.size(); j ++) ~~^~~~~~~~~~~ user.cpp:24:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i <= a.size(); i ++) ~~^~~~~~~~~~~ user.cpp:26:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j <= s.size(); j ++) ~~^~~~~~~~~~~ user.cpp:32:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i < a.size() && j < s.size() && a[i] == s[j]) ~~^~~~~~~~~~ user.cpp:32:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i < a.size() && j < s.size() && a[i] == s[j]) ~~^~~~~~~~~~ user.cpp:35:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i < a.size() && a[i] == '?') ~~^~~~~~~~~~ user.cpp:38:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i < a.size() && a[i] == '*') ~~^~~~~~~~~~ user.cpp:45:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i < a.size() && h == 0 && a[i] >= 'a' && a[i] <= 'z') ~~^~~~~~~~~~