Submission #519846

#	Time	Username	Problem	Language	Result	Execution time	Memory
519846		Lam_lai_cuoc_doi	Divide and conquer (IZhO14_divide)	C++17	48 / 100	1062 ms	3560 KiB

divide

#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using ld = long double;
using ull = unsigned long long;

template <class T>
void read(T &x)
{
    x = 0;
    register int c;
    while ((c = getchar()) && (c > '9' || c < '0'))
        ;
    for (; c >= '0' && c <= '9'; c = getchar())
        x = x * 10 + c - '0';
}

constexpr bool typetest = 0;
constexpr int N = 1e5 + 5;
int n;
struct miningcamp
{
    int x;
    ll g, e;
    miningcamp(int x = 0, ll g = 0, ll e = 0) : x(x), g(g), e(e) {}

    bool operator<(const miningcamp &a) const
    {
        return x < a.x;
    }
} a[N];

void Read()
{
    cin >> n;

    for (int i = 1; i <= n; ++i)
        cin >> a[i].x >> a[i].g >> a[i].e;
}

void Solve()
{
    sort(a + 1, a + n + 1);

    for (int i = 1; i <= n; ++i)
    {
        a[i].e += a[i - 1].e;
        a[i].g += a[i - 1].g;
    }

    ll ans(0);

    for (int i = 1; i <= n; ++i)
        for (int j = 1; j <= i; ++j)
            if (a[i].e - a[j - 1].e >= a[i].x - a[j].x)
                ans = max(ans, a[i].g - a[j - 1].g);

    cout << ans;
}

int32_t main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    if (fopen("tests.inp", "r"))
    {
        freopen("test.inp", "r", stdin);
        freopen("test.out", "w", stdout);
    }
    int t(1);
    if (typetest)
        cin >> t;
    for (int _ = 1; _ <= t; ++_)
    {
        // cout << "Case " << _ << ": ";
        Read();
        Solve();
    }
    cerr << "\nTime elapsed: " << 1000 * clock() / CLOCKS_PER_SEC << "ms\n";
}

/*
 */

Compilation message (stderr)

divide.cpp: In function 'void read(T&)':
divide.cpp:12:18: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   12 |     register int c;
      |                  ^
divide.cpp: In function 'int32_t main()':
divide.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("test.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
divide.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("test.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 17 / 17
• Subtask 2: 31 / 31
• Subtask 3: 0 / 52