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#include <iostream>
#include <fstream>
using namespace std;
int n,c,k,v[100];
bool Camion(int c)
{
int nr=1,s=0;
for(int i=1;i<=n;i++)
if(s+v[i]<=c)
s=s+v[i];
else{
nr++;
s=v[i];
}
if(nr<=k)
return true;
return false;
}
int Cautare(int st, int dr)
{
int mij, last;
while(st<=dr){
mij=(st+dr)/2;
if(Camion(mij)==true){
last=mij;
dr=mij-1;
}
else st=mij+1;
}
return last;
}
int main()
{
ifstream f("transport.in");
ofstream g("transport.out");
f>>n>>k;
for(int i=1;i<=n;i++)
f>>v[i];
int max=v[1], s=v[1];
for(int i=2;i<=n;i++){
s=s+v[i];
if(v[i]>max)
max=v[i];
}
f.close();
g<<Cautare(max,s);
g.close();
return 0;
}