제출 #442975

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
442975		zxcvbnm	Kas (COCI17_kas)	C++14	0 / 100	258 ms	99124 KiB

kas

#include <algorithm>
#include <cstdio>
#include <cstring>

using namespace std;

const int MAXN = 505;
const int MAXS = 100010;
const int INF  = 1e9;

int n, sum, sol;
int c[MAXN], memo[MAXN][MAXS/2];

int rek(int pos, int diff) {

  if (diff > sum / 2)
    return -INF;

  int& memo_ref = memo[pos][diff];

  if (memo_ref != -1)
    return memo_ref;

  if (pos == n)
    return memo_ref = (diff != 0) * (-INF);

  return memo_ref = max(rek(pos + 1, diff),
                    max(rek(pos + 1, diff + c[pos]) + c[pos],
                        rek(pos + 1, abs(diff - c[pos])) + c[pos]));

}

int main(void) {

  memset(memo, -1, sizeof memo);

  scanf("%d", &n);
  for (int i = 0; i < n; ++i) {
    scanf("%d", &c[i]);
    sum += c[i];
  }

  sol = rek(0, 0);
  sol += sum - 2 * sol;

  printf("%d\n", sol);

  return 0;

}

컴파일 시 표준 에러 (stderr) 메시지

kas.cpp: In function 'int main()':
kas.cpp:37:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |   scanf("%d", &n);
      |   ~~~~~^~~~~~~~~~
kas.cpp:39:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |     scanf("%d", &c[i]);
      |     ~~~~~^~~~~~~~~~~~~

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