Compilare: main.cpp: In function 'int solve(int, int)': main.cpp:14:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i == e.size() || j == s.size()) ~~^~~~~~~~~~~ main.cpp:14:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i == e.size() || j == s.size()) ~~^~~~~~~~~~~ main.cpp:16:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i == e.size() && j == s.size()) return 0; ~~^~~~~~~~~~~ main.cpp:16:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i == e.size() && j == s.size()) return 0; ~~^~~~~~~~~~~ main.cpp:17:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i == e.size()) return (1 << 30); ~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:46:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <= e.size() + 1; ++i) ~~^~~~~~~~~~~~~~~ main.cpp:47:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j <= s.size() + 1; ++j) ~~^~~~~~~~~~~~~~~