Submission #307210

#	Time	Username	Problem	Language	Result	Execution time	Memory
307210		cpp219	Stove (JOI18_stove)	C++14	100 / 100	22 ms	1312 KiB

stove

// Solid <candgenesis>
#include <bits/stdc++.h>
#define ll int
#define ld long double
#define fs first
#define sc second
using namespace std;
const ll N = 3e5 + 4;
const ll inf = 1e9 + 7;
const ll base = 37;
typedef pair<ll,ll> LL;

ll n,k,a[N],i,b[N];
bool lf(ll x,ll y){
    return x > y;
}
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    #define task "tst"
    if (fopen(task".inp", "r")){
        freopen(task".inp", "r", stdin);
        //freopen(task".out", "w", stdout);
    }
    cin>>n>>k; k--;
    for (i = 1;i <= n;i++) cin>>a[i];
    for (i = 1;i < n;i++) b[i] = a[i + 1] - a[i] - 1;
    sort(b + 1,b + n,lf);
    ll ans = a[n] - a[1] + 1;
    for (i = 1;i < n;i++){
        if (k) ans -= b[i],k--;
        else break;
    }
    cout<<ans;
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:22:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   22 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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