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Cod sursa(job #718180)
#include<stdio.h>
int v[16001],n,k;
int ok(int x){
int c=0,s=0,i;
for(i=1;i<=n;i++){
if(v[i]>x){
return 0;
}
if(s+v[i]>x){
s=v[i];
++c;
continue;
}
s+=v[i];
}
s+=v[n];
if(s>x){
++c;
}
if(c>k){
return 0;
}
return 1;
}
int bs(int st, long long dr){
int med,last;
while(st<=dr){
med=st+((dr-st)>>1);
if(ok(med)==1){
last=med;
dr=med-1;
}
else{
st=med+1;
}
}
return last;
}
int main(){
freopen("transport.in","r",stdin);
freopen("transport.out","w",stdout);
int i;
long long s;
scanf("%d%d",&n,&k);
for(i=1;i<=n;i++){
scanf("%d",&v[i]);
s+=v[i];
}
printf("%d\n",bs(1,s));
return 0;
}