Compilare: main.cpp: In function 'int main()': main.cpp:25:21: warning: iteration 2 invokes undefined behavior [-Waggressive-loop-optimizations] cout<<m[i]<<"\n"; ^~~~ main.cpp:24:18: note: within this loop for(int i=1;i<=3;i++) ~^~~ main.cpp:16:13: warning: iteration 2 invokes undefined behavior [-Waggressive-loop-optimizations] m[i]=N[i].size(); ~~~~^~~~~~~~~~~~ main.cpp:14:18: note: within this loop for(int i=1;i<=3;i++) ~^~~