제출 #994848

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
994848		StuckOnA	Stove (JOI18_stove)	C++17	100 / 100	16 ms	3008 KiB

stove

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

#define pb push_back
#define pf(x, y) (x).insert((x).begin(), y) 
#define int long long
#define nosync() ios_base::sync_with_stdio(false); cin.tie(NULL);
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define db(x) cerr << #x << " = " << x << endl;
#define duck cerr << "Duck" << endl;
#define __ << ' ' <<
#define endl '\n'
#define tcT template<class T
#define mp make_pair
#define f first
#define s second
#define cyn(x) cout << (x ? "YES" : "NO") << endl;
//#define remove_debug

using str = string;
using pi = pair<int, int>;
using vi = vector<int>;
using vs = vector<str>;
using vpi = vector<pi>;
using si = set<int>;
using mi = map<int, int>;
using mc = map<char, int>;
using ms = map<str, int>;

tcT > void input (vector<T> &x)
{
	for (auto &i : x) cin >> i;
}

tcT > void print (T x)
{
	for (auto i : x) cout << i << ' ';
	cout << endl;
}

tcT > void printfs (T x)
{
	for (auto i : x) cout << i.f __ i.s << endl;
}

tcT > void empty (T x) {}

#ifdef remove_debug
	#define cerr if(false) cerr
	#define print(x) empty(x)
	#define printfs(x) empty(x)
#endif

void init()
{
	fclose(fopen("output.txt", "w"));
	freopen("input.txt", "r", stdin);
	freopen("output.txt", "a", stdout);
	freopen("output.txt", "a", stderr);
}

void usaco(char *S)
{
	char I[99],O[99];
	sprintf(I,"%s.in",S);
	sprintf(O,"%s.out",S);
	freopen(I,"r",stdin);
	freopen(O,"w",stdout);
}

void solve() {
	int n, k;
	cin >> n >> k;
	vi v(n), vd(n - 1);
	input(v);
	for (int i = 0; i < n - 1; i++)
		vd[i] = v[i + 1] - v[i] - 1;
	sort(rall(vd));
	int sum = 0;
	for (int i = 0; i < k - 1; i++)
		sum += vd[i];
	cout << v[n - 1] - v[0] - sum + 1 << endl;
}

signed main() 
{
	nosync();
	
	#ifdef local
		init();
	#else
		//usaco("task_name");
	#endif	
	
	int t = 1;
	//cin >> t;
	for (int c = 1; c <= t; c++) {
		//cerr << "Case" << c << ": ";
		solve(); 
	}

	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

stove.cpp: In function 'void init()':
stove.cpp:58:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   58 |  freopen("input.txt", "r", stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:59:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |  freopen("output.txt", "a", stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:60:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |  freopen("output.txt", "a", stderr);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp: In function 'void usaco(char*)':
stove.cpp:68:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |  freopen(I,"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~
stove.cpp:69:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |  freopen(O,"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~

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