Compilare: main.cpp: In function 'int main()': main.cpp:12:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<b.length(); i++){ ~^~~~~~~~~~~ main.cpp:14:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1; j<a.length() && i+j<b.length(); j++){ ~^~~~~~~~~~~ main.cpp:14:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1; j<a.length() && i+j<b.length(); j++){ ~~~^~~~~~~~~~~ main.cpp:17:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j==a.length()-1){n++; if(n<=1000){c.pb(i);}}} ~^~~~~~~~~~~~~~ main.cpp:25:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<c.size(); i++){ ~^~~~~~~~~