Cod sursa(job #1525195)

Utilizator SoniaFlorinaHorchidan Sonia-Florina SoniaFlorina Data 14 noiembrie 2015 20:19:08
Problema Buline Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.9 kb
#include <fstream>
#include <climits>
#include <iostream>
using namespace std;
ifstream in ("buline.in");
ofstream out("buline.out");
int n,suma[400000],dek[400000],v[400000];

int main()
{ in>>n;
  int a,b,i;
  int prim,ultim,p=0,s=-INT_MAX,l=0;
  for(i=1;i<=n;i++)
      {in>>a>>b;
      if(b==1)
          {v[i]=a;
          v[n+i]=a;}
      else
          {v[i]=(-1)*a;
          v[n+i]=(-1)*a;}
      suma[i]=suma[i-1]+v[i];}
  for(i=n;i<=2*n;i++)
      suma[i]=suma[i-1]+v[i];
  prim=1;
  ultim=0;
  for(i=1; i<=2*n; i++)
      {while(suma[i]<=suma[dek[ultim]] && prim<=ultim)
              ultim--;
      ultim++;
      dek[ultim]=i;
      if(dek[prim]==i-n)
          prim++;
      if(s<suma[i]-suma[dek[prim]])
          {s=suma[i]-suma[dek[prim]];
          p=prim+1;
          l=i-prim;}
      }
 out<<s<<' '<<p<<' '<<l;
 in.close();
 out.close();
    return 0;
}