제출 #1241714

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1241714		hainam2k9	Kas (COCI17_kas)	C++20	100 / 100	106 ms	1996 KiB

kas

#include <bits/stdc++.h>
#define tt cin.tie(0), cout.tie(0), ios_base::sync_with_stdio(0)
#define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
#define ll long long
#define ull unsigned long long
#define i128 __int128
#define db long double
#define sz(a) ((int)(a).size())
#define pb emplace_back
#define pf emplace_front
#define pob pop_back
#define pof pop_front
#define lb lower_bound
#define ub upper_bound
#define fi first
#define se second
#define ins emplace
#define mp make_pair
using namespace std;
const int MOD = 1e9+7, MAXN = 2e5+5, offset = 1e5;
const string NAME = "";
int n,a[505],predp[MAXN],dp[MAXN],sum=0;
int main()
{
    tt;
    if(fopen((NAME + ".INP").c_str(), "r")) fo;
    cin >> n;
    for(int i = 1; i<=n; ++i)
        cin >> a[i];
    memset(dp,-0x3f,sizeof(dp));
    dp[offset]=0;
    for(int i = 1; i<=n; ++i){
        sum+=a[i];
        for(int j = -sum; j<=sum; ++j)
            predp[j+offset]=dp[j+offset];
        for(int j = -sum; j<=sum; ++j){
            if(j+a[i]<=sum) dp[j+offset]=max(dp[j+offset],predp[j+a[i]+offset]+a[i]);
            if(j-a[i]>=-sum) dp[j+offset]=max(dp[j+offset],predp[j-a[i]+offset]+a[i]);
        }
    }
    sum-=dp[offset];
    cout << dp[offset]/2+sum;
}

컴파일 시 표준 에러 (stderr) 메시지

kas.cpp: In function 'int main()':
kas.cpp:3:19: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
      |            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kas.cpp:26:45: note: in expansion of macro 'fo'
   26 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~
kas.cpp:3:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
      |                                                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kas.cpp:26:45: note: in expansion of macro 'fo'
   26 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10