Compilare: main.cpp: In function 'int main()': main.cpp:21:59: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(!st.empty() && st.top()<i-'0' && st.size()+n-nr>=n-k) ~~~~~~~~~~~~~~^~~~~ main.cpp:32:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i<result.size() ; ++i) ~^~~~~~~~~~~~~~ main.cpp:32:1: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i = 0 ; i<result.size() ; ++i) ^~~ main.cpp:35:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' return 0; ^~~~~~