제출 #897604

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
897604		mihtriii295	Kas (COCI17_kas)	C++17	0 / 100	38 ms	2652 KiB

kas

#include<bits/stdc++.h>
#pragma GCC optimize("O2")
#define ll  long long
#define TIME (1.0 * clock() / CLOCKS_PER_SEC)
#define el  cout << '\n' 

using namespace std;

const ll N = 3e5 + 1;
const ll logN = 20;
const ll MOD = 1e9 + 7;

int n, a[N], res, f[N], sum;
int main(){
    if(fopen("coci1617_r4_kas.inp", "r")){
        freopen("coci1617_r4_kas.inp", "r", stdin);
        freopen("coci1617_r4_kas.out", "w", stdout);
    }
    ios_base::sync_with_stdio(0); cin.tie(NULL);
    cout.tie(NULL);
    cin >> n;
    f[0] = 2;
    for (int i = 1; i <= n; ++i){
        cin >> a[i];
        sum += a[i];
    }
    for (int i = 1; i <= n; ++i){
        for (int j = sum; j >= a[i]; --j){
            if (f[j - a[i]] > 0)
                f[j]++;
        }
    }
    for (int i = sum; i >= 0; --i)
        if (f[i] >= 2){
            cout << i;
            break;
        }
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

kas.cpp: In function 'int main()':
kas.cpp:16:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |         freopen("coci1617_r4_kas.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kas.cpp:17:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         freopen("coci1617_r4_kas.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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