http://poj.org/problem?id=1153 #include <stdio.h> #include<iostream> #include<algorithm> using namespace std; int P[300000]; int SEG=10000000; int main() { long n; long i; long j; double result,tempresult; cin>>n; for(i=0;i<n;i++) { cin>>P[i]; } sort(P,P+n); for(i=0;i<n;i++) { P[i+n]=P[i]+SEG; P[i+2*n]=P[i+n]+SEG; } tempresult=0; int s; s=P[n]+SEG/2; for(i=n+1;P[i]<=s;++i) { tempresult+=(P[i]-P[n]); } int ln=i; j=2*n-i; for(i=0;i<j;++i) { tempresult+=(P[n]-P[n-i-1]); } result=tempresult; for(i=n+1;i<2*n;++i) { s=P[i]+SEG/2; for(j=ln;P[j]<=s;j++) { tempresult+=(P[j]-P[i]); tempresult-=(P[i-1]-P[j-n]); } tempresult+=((n-ln+2*i-j)*(P[i]-P[i-1])); ln=j; if(result>tempresult) result=tempresult; } printf("%.0fn",result); return 0; }
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