Compilare: user.cpp: In function ‘int main()’: user.cpp:25:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < s1.size()) { ~~^~~~~~~~~~~ user.cpp:29:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(hs1.size() < n1 + 2); ~~~~~~~~~~~^~~~~~~~ user.cpp:29:17: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation] if(hs1.size() < n1 + 2); ^~ user.cpp:30:21: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’ hs1.push_back(0); ^~~ user.cpp:33:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(hs2.size() < n1 + 2); ~~~~~~~~~~~^~~~~~~~ user.cpp:33:17: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation] if(hs2.size() < n1 + 2); ^~ user.cpp:34:21: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’ hs2.push_back(0); ^~~ user.cpp:47:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < s2.size()) { ~~^~~~~~~~~~~ user.cpp:51:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(h1.size() < n2 + 2); ~~~~~~~~~~^~~~~~~~ user.cpp:51:17: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation] if(h1.size() < n2 + 2); ^~ user.cpp:52:21: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’ h1.push_back(0); ^~ user.cpp:55:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(h2.size() < n2 + 2); ~~~~~~~~~~^~~~~~~~ user.cpp:55:17: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation] if(h2.size() < n2 + 2); ^~ user.cpp:56:21: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’ h2.push_back(0); ^~ user.cpp:14:9: warning: unused variable ‘nr’ [-Wunused-variable] int nr = 0; ^~