Submission #76859

#	Time	Username	Problem	Language	Result	Execution time	Memory
76859		Vardanyan	Stove (JOI18_stove)	C++14	100 / 100	33 ms	10540 KiB

stove

#include <bits/stdc++.h>
using namespace std;
const int N = 5007*107;
long long a[N];
long long dif[N];
int main(){
    int n,k;
    scanf("%d%d",&n,&k);
    for(int i = 1;i<=n;i++){
            scanf("%lld",&a[i]);
          if(i>1)  dif[i] = a[i]-a[i-1];
    }
    sort(dif+1,dif+1+n);
    reverse(dif+1,dif+1+n);
    long long c = 0;
    for(int i = 1;i<=k-1;i++)c+=dif[i];
    c = a[n]-a[1]+k-c;
    printf("%lld\n",c);
    return 0;
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:8:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&k);
     ~~~~~^~~~~~~~~~~~~~
stove.cpp:10:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%lld",&a[i]);
             ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50