Compilare: main.cpp: In function 'void task(unsigned int)': main.cpp:13:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<n-1; ++j){ ~^~~~ main.cpp: In function 'int main()': main.cpp:25:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<n; ++i){ ~^~ main.cpp:28:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==n-1){ ~^~~~~ main.cpp:52:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=st; i<=dr; ++i) ~^~~~ main.cpp:51:5: warning: this 'else' clause does not guard... [-Wmisleading-indentation] else ^~~~ main.cpp:54:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else' return 0; ^~~~~~