Submission #647572

#	Time	Username	Problem	Language	Result	Execution time	Memory
647572		x0r	K blocks (IZhO14_blocks)	C++17	0 / 100	1 ms	212 KiB

blocks

#pragma GCC optimize ("O2")
#include <bits/stdc++.h>

#define ll long long
#define ld long double
#define fi first 
#define se second
#define pll pair < ll, ll >
#define pii pair < int, int >
#define fast ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);

using namespace std;

const string NAME = "";
const string NAME2 = "TEST";
const ld ESP = 1e-9;
const ll INF = 1e9 + 7;
const ll LINF = 1E18;
const ll nmax = 2e5;
const ll MOD = 1e9 + 7;
const ll base = 2309;

void fre() {
	string finp = NAME + ".inp";
	string fout = NAME + ".out";
	freopen(finp.c_str(), "r", stdin);
	freopen(fout.c_str(), "w", stdout);
}

int n, k, a[100003], s[100003];

int main() {
	fast;
	cin >> n >> k;
	int maxa = -1;
	for (int i = 1; i <= n; i++) {
		cin >> a[i];
		s[i] = s[i - 1] + a[i];
		if (maxa == -1 || a[i] >= a[maxa]) maxa = i;
	}
	int res = INF;
	for (int i = 0; i <= min(k - 1, maxa - 1); i++) res = min(res, a[maxa] + s[i] + s[n] - s[n - k + 1 + i]);
	cout << res;
}

Compilation message (stderr)

blocks.cpp: In function 'void fre()':
blocks.cpp:26:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |  freopen(finp.c_str(), "r", stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
blocks.cpp:27:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |  freopen(fout.c_str(), "w", stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 18
• Subtask 3: 0 / 21
• Subtask 4: 0 / 47