답안 #578770

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
578770	2022-06-17T23:00:13 Z	AlperenT	Homecoming (BOI18_homecoming)	C++17	컴파일 오류	0 ms	0 KB

homecoming

#include <bits/stdc++.h>
#include "homecoming.h"

using namespace std;

const long long INF = 1e18;

long long solve(int n, int k, vector<int> a, vector<int> b){
	long long ans = 0;

	long long mx, cur, cost, nxtcost;

	for(int it = 1; it <= 2; it++){
		mx = (it == 1 ? -INF : 0);

		cost = accumulate(b.begin(), b.begin() + k, 0ll);

		cur = a[0] - cost;

		mx = max(mx, cur);

		for(int i = 1; i < n; i++){
			cost -= b[i - 1];

			if(i + k - 1 < n) nxtcost = b[i + k - 1];
			else if(it == 2) nxtcost = b[i + k - 1 - n];

			cur = max(a[i] + cur - nxtcost, a[i] - (cost + nxtcost) + mx);

			cost += nxtcost;

			mx = max(mx, cur);
		}

		ans = max(ans, mx);
	}

	return ans;
}

Compilation message

homecoming.cpp: In function 'long long int solve(int, int, std::vector<int>, std::vector<int>)':
homecoming.cpp:28:25: warning: 'nxtcost' may be used uninitialized in this function [-Wmaybe-uninitialized]
   28 |    cur = max(a[i] + cur - nxtcost, a[i] - (cost + nxtcost) + mx);
/usr/bin/ld: /tmp/cchwFWCd.o: in function `main':
grader.cpp:(.text.startup+0xdf): undefined reference to `solve(int, int, int*, int*)'
collect2: error: ld returned 1 exit status