Compilare: main.cpp: In function 'int main()': main.cpp:13:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(n<s1.size()&&m<s2.size()) ~^~~~~~~~~~ main.cpp:13:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(n<s1.size()&&m<s2.size()) ~^~~~~~~~~~ main.cpp:12:9: warning: 'n' may be used uninitialized in this function [-Wmaybe-uninitialized] int n,m; ^ main.cpp:13:25: warning: 'm' may be used uninitialized in this function [-Wmaybe-uninitialized] while(n<s1.size()&&m<s2.size()) ~^~~~~~~~~~