Submission #1263517

#	Time	Username	Problem	Language	Result	Execution time	Memory
1263517		wedonttalkanymore	만두 팔기 (JOI14_manju)	C++20	100 / 100	9 ms	728 KiB

t2

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

#define int long long
#define pii pair<ll, ll>
#define fi first
#define se second

const ll N = 2e5 + 5, inf = 1e18, mod = 1e9 + 7, block = 320, lim = 16;

int m, n, a[N], c[N], e[N];
int pfs[N];
int dp[N];
int res[N];

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    if (fopen(".inp", "r")) {
        freopen(".inp", "r", stdin);
        freopen(".out", "w", stdout);
    }
    cin >> m >> n;
    for (int i = 1; i <= m; i++) cin >> a[i];
    for (int i = 1; i <= n; i++) cin >> c[i] >> e[i];
    sort(a + 1, a + m + 1, greater <int>());
    for (int i = 1; i <= m; i++) pfs[i] = pfs[i - 1] + a[i];
    for (int i = 1; i <= m; i++) dp[i] = inf;
    for (int j = 1; j <= n; j++) {
        for (int i = m; i >= 0; i--) {
            if (dp[i] == inf) continue;
            int nxt = i + c[j];
            if (nxt > m) nxt = m;
            dp[nxt] = min(dp[nxt], dp[i] + e[j]);
        }
    }
    res[m + 1] = inf;
    for (int i = m; i >= 1; i--) {
        res[i] = min(res[i + 1], dp[i]);
    }
    int ans = 0;
    for (int i = 1; i <= m; i++) ans = max(ans, pfs[i] - res[i]);
    cout << ans;
    return 0;
}

Compilation message (stderr)

t2.cpp: In function 'int main()':
t2.cpp:21:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |         freopen(".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~
t2.cpp:22:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         freopen(".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~

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