Submission #1263518

#	Time	Username	Problem	Language	Result	Execution time	Memory
1263518		tminh	만두 팔기 (JOI14_manju)	C++20	100 / 100	9 ms	612 KiB

t2

#include "bits/stdc++.h"
using namespace std;

#define task ""
#define ll long long
#define endl '\n'
#define fi first
#define se second
#define vall(a) (a).begin(), (a).end()
#define sze(a) (int)a.size()
#define pii pair<int, int>
#define pll pair<ll, ll>


#define ep emplace_back
#define pb push_back
#define pf push_front


const ll mod = 1e9 + 7;
const int N = 1e6 + 5;
const ll oo = 1e18;

bool START;


int n, m;
ll p[N] , dp[N];


ll get(int l, int r) {
	return p[r] - p[l - 1];
}

inline void solve() {
	sort(p + 1, p + 1 + n, greater<ll>());
	for (int i = 1; i <= n; ++i) {
		dp[i] = oo;
		p[i] += p[i - 1];
	}
	dp[0] = 0;
	
	for (int i = 1; i <= m; ++i) {
		ll c, e;
		cin >> c >> e;
		for (int j = n; j >= 0; --j)  {
			int nxt = min(j + c, 1ll * n);
			if (dp[j] != oo) dp[nxt] = min(dp[nxt], dp[j] + e);
		}
	}
	ll ans = 0;
	for (int i = 0; i <= n; ++i) ans = max(ans, p[i] - dp[i]); 
	cout << ans;
	
}


inline void input() {
    cin >> n >> m;
    for (int i = 1; i <= n; ++i) cin >> p[i];
    	
    
    return solve();
}
bool END;

int main() {
    if(fopen(task ".inp", "r")) {
        freopen(task ".inp", "r", stdin);
        freopen(task ".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);

    input();
    
    
    cerr << endl << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << 's' << endl;
    cerr << "Memory: " << fabs ((&END - &START)) / 1048576.0 << "MB\n";
    return 0;
}

Compilation message (stderr)

t2.cpp: In function 'int main()':
t2.cpp:69:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |         freopen(task ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
t2.cpp:70:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   70 |         freopen(task ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 25 / 25
• Subtask 2: 35 / 35
• Subtask 3: 40 / 40