Compilare: user.cpp: In function ‘int main()’: user.cpp:45:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (maxlen < v.length()) maxlen = v.length(); ^ user.cpp:52:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v == "" && s[i].length() == maxlen) v = s[i]; ^ user.cpp:53:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (s[i].length() == maxlen && v > s[i]) v = s[i]; ^ user.cpp:65:73: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (LCSLen(v1,v2) == min(s[i].length(),s[j].length())) { ^ user.cpp:68:40: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if (j = n-1) ans.push_back(s[i]); ^ user.cpp:76:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < ans.size(); i++) ^