Compilare: main.cpp: In function 'int main()': main.cpp:36:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s2.size(); ++i) fr2[s2[i] - 'a']++; ~~^~~~~~~~~~~ main.cpp:48:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < dp.size(); ++i) ~~^~~~~~~~~~~ main.cpp:94:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s1.size(); ++i) ~~^~~~~~~~~~~ main.cpp:108:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s2.size(); ++i) ~~^~~~~~~~~~~ main.cpp:113:64: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos == -1 || dp[pos] < maxim - 1 || (i < s2.size() - 1 && pos == s1.size())) ~~^~~~~~~~~~~~~~~ main.cpp:113:87: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos == -1 || dp[pos] < maxim - 1 || (i < s2.size() - 1 && pos == s1.size())) ~~~~^~~~~~~~~~~~ main.cpp:115:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos < s1.size() - 1) ~~~~^~~~~~~~~~~~~~~