Compilare: user.cpp: In function ‘int main()’: user.cpp:16:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<n;i++){ ~^~ user.cpp:25:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i.first>n-1) ~~~~~~~^~~~ user.cpp:42:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = n-2; i>=n-d[n-1].first-1; i--){ ~^~~~~~~~~~~~~~~~~~