Compilare: main.cpp: In function 'int main()': main.cpp:12:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<a.size();i++) ~^~~~~~~~~ main.cpp:20:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<b.size();i++) ~^~~~~~~~~ main.cpp:21:6: warning: this 'while' clause does not guard... [-Wmisleading-indentation] {while(a[l]!=b[i] && l!=0) ^~~~~ main.cpp:23:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while' if(a[l]==b[i]) ^~ main.cpp:25:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l==a.size()) ~^~~~~~~~~~