Submission #638423

#	Time	Username	Problem	Language	Result	Execution time	Memory
638423		pere_gil	Stove (JOI18_stove)	C++14	100 / 100	20 ms	3196 KiB

stove

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

typedef long long ll;

int main(){
	ll n,k; scanf("%lld %lld",&n,&k);
	vector<ll> v(n);
	for(int i=0;i<n;i++) scanf("%lld",&v[i]);

	ll res=n;
	ll used=n;
	vector<ll> a;
	for(int i=0;i<n-1;i++)
		if(v[i]+1==v[i+1]) used--;
		else a.push_back(v[i+1]-v[i]-1);
   	sort(a.begin(),a.end());

	for(int i=0;i<a.size() && used>k;i++,used--)
		res+=a[i];

	printf("%lld\n",res);
	
	return 0;
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:19:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |  for(int i=0;i<a.size() && used>k;i++,used--)
      |              ~^~~~~~~~~
stove.cpp:7:15: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |  ll n,k; scanf("%lld %lld",&n,&k);
      |          ~~~~~^~~~~~~~~~~~~~~~~~~
stove.cpp:9:28: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |  for(int i=0;i<n;i++) scanf("%lld",&v[i]);
      |                       ~~~~~^~~~~~~~~~~~~~

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