Compilare: main.cpp: In function 'int main()': main.cpp:36:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=1;i<=nm;i++) ^~~ main.cpp:41:7: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' cout<<1<<'\n'; ^~~~ main.cpp:43:14: warning: iteration 30003 invokes undefined behavior [-Waggressive-loop-optimizations] if(ex[i]) ~~~~^ main.cpp:42:18: note: within this loop for(int i=2;i<=nm;i++) ~^~~~