Submission #939844

#	Time	Username	Problem	Language	Result	Execution time	Memory
939844		n3rm1n	Food Court (JOI21_foodcourt)	C++17	0 / 100	1045 ms	524288 KiB

foodcourt

#include<bits/stdc++.h>
using namespace std;
const long long MAXN = 3e5+10;
void speed()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
}
long long n, m, que;
vector < pair < long long/**type*/, long long/**number*/ > > q[MAXN];
vector < int > pref[MAXN];
long long total[MAXN];
long long type;
long long l, r, c, k, a, b;

int t[MAXN * 4], lazy[MAXN * 4];

void push_lazy(int i, int l, int r)
{
    if(lazy[i])
        t[i] += (r - l + 1) * lazy[i];
    if(lazy[i] && l != r)
    {
        lazy[2*i] += lazy[i];
        lazy[2*i+1] += lazy[i];
    }
    lazy[i] = 0;
}
int ql, qr, val;
int query(int i, int l, int r)
{
    push_lazy(i, l, r);
    if(ql <= l && r <= qr)return t[i];
    if(qr < l || r < ql)return 0;
    int mid = (l + r)/2;
    return query(2*i, l, mid) + query(2*i+1, mid+1, r);
}
void update(int i, int l, int r)
{
    push_lazy(i, l, r);
    if(qr < l || ql > r)return;
    if(ql <= l && r <= qr)
    {
        lazy[i] = val;
        push_lazy(i, l, r);
        return;
    }
    int mid = (l + r)/2;
    update(2*i, l, mid);
    update(2*i+1, mid+1, r);
    t[i] = t[2*i] + t[2*i+1];
}

void read()
{
    cin >> n >> m >> que;
    int last_add = 0;
    for (long long i = 1; i <= que; ++ i)
    {
        cin >> type;
        if(type == 1)
        {
            cin >> l >> r >> c >> k;
            for (int j = l; j <= r; ++ j)
            {
                total[j] += k;
                q[j].push_back(make_pair(c, k));

                int last = 0;
                if(pref[j].size())last = pref[j][pref[j].size()-1];

                pref[j].push_back(last + k);
            }
            //cout << "ended " << endl;
        }
        else if(type == 2)
        {
            cin >> l >> r >> k;
            for (int j = l; j <= r; ++ j)
            {
                ql = j;
                qr = j;
                val = min(total[j], k);
                update(1, 1, n);
                total[j] -= val;
            }
        }
        else
        {
            cin >> a >> b;
            ql = a;
            qr = a;
            b += query(1, 1, n);
           // cout << "newb is " << b << endl;
            int bl = 0, br = pref[a].size()-1, mid, bans = 0;
            while(bl <= br)
            {
                mid = (bl + br)/2;
                if(pref[a][mid] < b)
                {
                    bl = mid + 1;
                    bans = mid;
                }
                else
                {

                    br = mid - 1;
                }
            }
            /*if(a == 3)
            {
                cout << b << endl;
                for (int j = 0; j < pref[a].size(); ++ j)
                    cout << pref[a][j] << " ";
                cout << endl;
                cout << bans << endl;
            }*/
           if(bans + 1 >= pref[a].size())cout << 0 << endl;
        else cout << q[a][bans+1].first << endl;
        }
    }
}
int main()
{
    speed();

    read();
	return 0;
}

Compilation message (stderr)

foodcourt.cpp: In function 'void read()':
foodcourt.cpp:119:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  119 |            if(bans + 1 >= pref[a].size())cout << 0 << endl;
      |               ~~~~~~~~~^~~~~~~~~~~~~~~~~
foodcourt.cpp:58:9: warning: unused variable 'last_add' [-Wunused-variable]
   58 |     int last_add = 0;
      |         ^~~~~~~~

• Subtask 1: 0 / 2
• Subtask 2: 0 / 5
• Subtask 3: 0 / 7
• Subtask 4: 0 / 21
• Subtask 5: 0 / 15
• Subtask 6: 0 / 13
• Subtask 7: 0 / 26
• Subtask 8: 0 / 11