Submission #108776

#	Time	Username	Problem	Language	Result	Execution time	Memory
108776		thebes	Stove (JOI18_stove)	C++14	100 / 100	36 ms	2168 KiB

stove

#include <bits/stdc++.h>
using namespace std;

const int MN = 1e5+5;
typedef long long ll;
ll arr[MN], n, i, x, y, k, ans, r;

int main(){
    scanf("%lld%lld%lld",&n,&k,&x);
    r = k; k = max(0LL, n-k);
    for(i=2;i<=n;i++){
        scanf("%lld",&y);
        arr[i-1]=y-x; x=y;
    }
    sort(arr+1,arr+n,[](ll i,ll j){return i<j;});
    for(i=1;i<=k;i++) ans += arr[i];
    printf("%lld\n",ans+r);
    return 0;
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld%lld%lld",&n,&k,&x);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:12:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld",&y);
         ~~~~~^~~~~~~~~~~

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