Submission #938652

#	Time	Username	Problem	Language	Result	Execution time	Memory
938652		danikoynov	Two Dishes (JOI19_dishes)	C++14	10 / 100	10064 ms	27744 KiB

dishes

#include <bits/stdc++.h>
#define endl '\n'

using namespace std;
typedef long long ll;

void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}

const int maxn = 2e5 + 10;

int n, m;
ll a[maxn], s[maxn], p[maxn];
ll b[maxn], t[maxn], q[maxn];
ll pref[2][maxn];

void input()
{
    cin >> n >> m;
    for (int i = 1; i <= n; i ++)
        cin >> a[i] >> s[i] >> p[i];
    for (int i = 1; i <= m; i ++)
        cin >> b[i] >> t[i] >> q[i];
}

void prefix_sums()
{
    for (int i = 1; i <= n; i ++)
    {
        pref[0][i] = pref[0][i - 1] + a[i];
    }
    for (int i = 1; i <= m; i ++)
    {
        pref[1][i] = pref[1][i - 1] + b[i];
    }
}

ll dp[maxn], temp[maxn];
vector < pair < int, ll > > upd[maxn];
int X[maxn], Y[maxn];
const ll inf = 1e18;
void dynamic()
{
    for (int i = 1; i <= n; i ++)
    {
        ll free_time = s[i] - pref[0][i];
        while(X[i] <= m && pref[1][X[i]] <= free_time)
            X[i] ++;
        X[i] --;



        upd[i - 1].push_back({X[i] + 1, - p[i]});
        ///cout << "point " << i - 1 << " " << X[i] + 1 << " " << -p[i] << endl;


    }

    for (int i = 1; i <= m; i ++)
    {
        ll free_time = t[i] - pref[1][i];
        while(Y[i] <= n && pref[0][Y[i]] <= free_time)
            Y[i] ++;
        Y[i] --;

        if (Y[i] >= 0)
        {
            upd[Y[i]].push_back({i, q[i]});

            //cout << "point " << Y[i] << " " << i << " " << q[i] << endl;
        }
    }

    for (int j = 0; j <= m; j ++)
        dp[j] = 0;
    for (pair < int, ll > cur : upd[0])
        for (int d = cur.first; d <= m; d ++)
        dp[d] += cur.second;

    for (int i = 1; i <= m; i ++)
        dp[i] = max(dp[i], dp[i - 1]);
    for (int i = 1; i <= n; i ++)
    {
        sort(upd[i].begin(), upd[i].end());
        for (int j = 0; j <= m; j ++)
            temp[j] = 0;

        ll sum = 0;
        for (int j = 0; j < upd[i].size(); j ++)
        {
            int cur = upd[i][j].first;
            int nxt = m + 1;
            if (j + 1 < upd[i].size())
                nxt = upd[i][j + 1].first;

            sum += upd[i][j].second;
            if (upd[i][j].first == 0 || i == n)
            {
                for (int d = cur; d < nxt; d ++)
                    dp[d] += sum;
            }
            else
            {
                ll bef = dp[upd[i][j].first - 1];
                int last = cur - 1;
                for (int d = cur; d < nxt; d ++)
                {
                    if (dp[d] + sum < bef)
                        last = d;
                }

                for (int d = cur; d <= last; d ++)
                    dp[d] = bef;
                for (int d = last + 1; d < nxt; d ++)
                    dp[d] += sum;

            }
        }
        /*for (pair < int, ll > cur : upd[i])
        {
            sum += cur.second;

            ll var = dp[cur.first] + sum;

            //cout << "update point " << cur.first << " " << cur.second << endl;

            for (int d = cur.first; d <= m; d ++)
            {
                temp[d] += cur.second;
            }
        }
        for (int j = 0; j <= m; j ++)
        {
            ///best = max(best, dp[j]);
            dp[j] += temp[j];
        }

        if (i != n)
        {
            for (int j = 1; j <= m; j ++)
                dp[j] = max(dp[j - 1], dp[j]);
        }*/

        /**cout << "state " << i << endl;
        for (int j = 0; j <= m; j ++)
            cout << dp[j] << " ";
        cout << endl;*/
    }

    ll res = 0;
    for (int i = 1; i <= n; i ++)
        res += p[i];

    res = res + dp[m];
    cout << res << endl;




    /**for (int i = 0; i <= n; i ++)
    {
        for (int j = 0; j <= m; j ++)
        {
            if (i > 0)
            {
                dp[i][j] = max(dp[i][j], dp[i - 1][j] + (pref[0][i] + pref[1][j] <= s[i]));
            }
            if (j > 0)
            {
                dp[i][j] = max(dp[i][j], dp[i][j - 1] + (pref[0][i] + pref[1][j] <= t[j]));
            }

            ///cout << "state " << i << "  " << j << " " << dp[i][j] << endl;
        }
    }

    cout << dp[n][m] << endl;*/



}
void solve()
{
    input();
    prefix_sums();
    dynamic();
}

int main()
{
    speed();
    solve();
    return 0;
}
/**
9 12
414814218 278771326 1
142790158 568604393 1
155567225 14012701 1
627555390 1224920860 1
677068511 5243031298 1
580933994 8598159379 1
819258172 1432469030 1
340548310 999347990 1
432162069 4373255579 1
99824657 11080715 1
756309567 9502204999 1
929699364 2343419815 1
376204577 6097684636 1
399553538 2306014840 1
824786328 4994974413 1
536419761 3247725215 1
953903194 10674273733 1
787043482 3936134684 1
105275489 567691865 1
861537554 117255456 1
434345770 2420939138 1

*/

Compilation message (stderr)

dishes.cpp: In function 'void dynamic()':
dishes.cpp:93:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   93 |         for (int j = 0; j < upd[i].size(); j ++)
      |                         ~~^~~~~~~~~~~~~~~
dishes.cpp:97:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   97 |             if (j + 1 < upd[i].size())
      |                 ~~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 3 / 3
• Subtask 3: 7 / 7
• Subtask 4: 0 / 39
• Subtask 5: 0 / 11
• Subtask 6: 0 / 9
• Subtask 7: 0 / 17
• Subtask 8: 0 / 9