oj.uz

답안 #674120

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
674120 2022-12-23T09:12:08 Z messiuuuuu 가로등 (APIO19_street_lamps) C++17
100 / 100
 1006 ms 103636 KB 
//Make CSP great again
//Vengeance
#include <bits/stdc++.h>
#define TASK "TESTCODE"
#define Log2(x) 31 - __builtin_clz(x)
using namespace std;
const int N = 3e5 + 1;
struct SegmentTree
{
    struct FenwickTree
    {
        vector<int> tree;
        int sz;
        void Assign(int _sz)
        {
            sz = _sz;
            tree.resize(sz, 0);
        }
        void add(int pos, int val)
        {
            for (; pos >= 0; pos = (pos & (pos + 1)) - 1)
            {
                tree[pos] += val;
            }
        }
        int sum(int pos)
        {
            int ret = 0;
            for (; pos < sz; pos |= pos + 1)
            {
                ret += tree[pos];
            }
            return ret;
        }
    } tree[4 * N + 1];
    vector<int> num[4 * N + 1];
    void add_num(int v, int TreeL, int TreeR, int L, int R, int val)
    {
        if (L > R)
        {
            return ;
        }
        if (TreeL == L && TreeR == R)
        {
            num[v].push_back(val);
            return ;
        }
        int mid = (TreeL + TreeR)/2;
        add_num(v * 2, TreeL, mid, L, min(R, mid), val);
        add_num(v * 2 + 1, mid + 1, TreeR, max(L, mid + 1), R, val);
    }
    void build(int v, int TreeL, int TreeR)
    {
        sort(num[v].begin(), num[v].end());
        num[v].erase(unique(num[v].begin(), num[v].end()), num[v].end());
        tree[v].Assign(num[v].size());
        if (TreeL == TreeR)
        {
            return ;
        }
        int mid = (TreeL + TreeR)/2;
        build(v * 2, TreeL, mid);
        build(v * 2 + 1, mid + 1, TreeR);
    }
    int convert(int v, int x)
    {
        return lower_bound(num[v].begin(), num[v].end(), x) - num[v].begin();
    }
    void add_val(int v, int TreeL, int TreeR, int L, int R, int num, int val)
    {
        if (L > R)
        {
            return ;
        }
        if (TreeL == L && TreeR == R)
        {
            tree[v].add(convert(v, num), val);
            return ;
        }
        int mid = (TreeL + TreeR)/2;
        add_val(v * 2, TreeL, mid, L, min(R, mid), num, val);
        add_val(v * 2 + 1, mid + 1, TreeR, max(L, mid + 1), R, num, val);
    }
    int get(int v, int TreeL, int TreeR, int pos, int fn)
    {
        int ret = tree[v].sum(convert(v, fn));
        if (TreeL == TreeR)
        {
            return ret;
        }
        int mid = (TreeL + TreeR)/2;
        if (pos <= mid)
        {
            return ret + get(v * 2, TreeL, mid, pos, fn);
        }
        else
        {
            return ret + get(v * 2 + 1, mid + 1, TreeR, pos, fn);
        }
    }
} tree;
char lamp[N + 1], st_lamp[N + 1];
int n, q, a[N + 1], b[N + 1];
set<tuple<int, int, int> > st_state, cur;
void read()
{
    cin >> n >> q;
    for (int i = 1; i <= n; ++ i)
    {
        cin >> st_lamp[i];
        lamp[i] = st_lamp[i];
    }
    int l = -1, r = -1;
    for (int i = 1; i <= n; ++ i)
    {
        if (lamp[i] == '0')
        {
            if (l != -1 && r != -1)
            {
                st_state.insert({l, r, 0});
                l = r = -1;
            }
        }
        else
        {
            if (l == -1)
            {
                l = i;
            }
            r = i + 1;
        }
    }
    if (l != -1 && r != -1)
    {
        st_state.insert({l, r, 0});
    }
    cur = st_state;
}
set<tuple<int, int, int> > :: iterator contain(int x)
{
    set<tuple<int, int, int> > :: iterator it = cur.upper_bound({x, N + 10, N + 10});
    if (it != cur.begin())
    {
        --it;
    }
    if (it == cur.end())
    {
        return it;
    }
    int l, r, t;
    tie(l, r, t) = *it;
    if (l <= x && x <= r)
    {
        return it;
    }
    else
    {
        return cur.end();
    }
}
void solve()
{
    for (auto &[l, r, t] : cur)
    {
        //cerr << l << ' ' << r << '\n';
        tree.add_num(1, 1, n + 1, l, r, r);
    }
    for (int i = 1; i <= q; ++ i)
    {
        string s;
        cin >> s;
        if (s == "query")
        {
            cin >> a[i] >> b[i];
        }
        else
        {
            cin >> a[i];
            if (lamp[a[i]] == '0')
            {
                lamp[a[i]] = '1';
                int l = a[i], r = a[i] + 1;
                auto it = contain(a[i] + 1);
                if (it != cur.end())
                {
                    r = get<1> (*it);
                    cur.erase(it);
                }
                it = contain(a[i]);
                if (it != cur.end())
                {
                    l = get<0> (*it);
                    cur.erase(it);
                }
                //cerr << l << ' ' << r << '\n';
                cur.insert({l, r, i});
                tree.add_num(1, 1, n + 1, l, r, r);
            }
            else
            {
                lamp[a[i]] = '0';
                auto it = contain(a[i]);
                int l = get<0> (*it), r = get<1> (*it);
                cur.erase(it);
                //cerr << l << ' ' << r << '\n';
                if (l < a[i])
                {
                    cur.insert({l, a[i], i});
                    tree.add_num(1, 1, n + 1, l, a[i], a[i]);
                }
                if (r > a[i] + 1)
                {
                    cur.insert({a[i] + 1, r, i});
                    tree.add_num(1, 1, n + 1, a[i] + 1, r, r);
                }
            }
        }
    }
    tree.build(1, 1, n + 1);
    cur = st_state;
    copy(st_lamp + 1, st_lamp + n + 1, lamp + 1);
    for (auto &[l, r, t] : cur)
    {
        //cerr << l << ' ' << r << '\n';
        //tree.add_val(1, 1, n + 1, l, r, r, 1);
    }
    for (int i = 1; i <= q; ++ i)
    {
        if (b[i]) // query
        {
            int res = tree.get(1, 1, n + 1, a[i], b[i]);
            auto it = contain(a[i]);
            if (it != cur.end() && get<1> (*it) >= b[i])
            {
                res += i - get<2> (*it);
            }
            cout << res << '\n';
        }
        else // update
        {
            if (lamp[a[i]] == '0')
            {
                lamp[a[i]] = '1';
                int l = a[i], r = a[i] + 1;
                auto it = contain(a[i] + 1);
                if (it != cur.end())
                {
                    r = get<1> (*it);
                    tree.add_val(1, 1, n + 1, a[i] + 1, r, r, i - get<2> (*it));
                    cur.erase(it);
                }
                it = contain(a[i]);
                if (it != cur.end())
                {
                    l = get<0> (*it);
                    tree.add_val(1, 1, n + 1, l, a[i], a[i], i - get<2> (*it));
                    cur.erase(it);
                }
                cur.insert({l, r, i});
            }
            else
            {
                lamp[a[i]] = '0';
                auto it = contain(a[i]);
                int l, r, t;
                tie(l, r, t) = *it;
                cur.erase(it);
                tree.add_val(1, 1, n + 1, l, r, r, i - t);
                if (l < a[i])
                {
                    cur.insert({l, a[i], i});
                    //tree.add_val(1, 1, n + 1, l, a[i], a[i], i - 1 - t);
                }
                if (r > a[i] + 1)
                {
                    cur.insert({a[i] + 1, r, i});
                    //tree.add_val(1, 1, n + 1, a[i] + 1, r, r, i - 1 - t);
                }
            }
        }
    }
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if (fopen(TASK".INP", "r"))
    {
        freopen(TASK".INP", "r", stdin);
        //freopen(TASK".OUT", "w", stdout);
    }
    int t = 1;
    bool typetest = false;
    if (typetest)
    {
        cin >> t;
    }
    for (int __ = 1; __ <= t; ++ __)
    {
        //cout << "Case " << __ << ": ";
        read();
        solve();
    }
}

Compilation message

street_lamps.cpp: In function 'void solve()':
street_lamps.cpp:222:16: warning: unused structured binding declaration [-Wunused-variable]
  222 |     for (auto &[l, r, t] : cur)
      |                ^~~~~~~~~
street_lamps.cpp: In function 'int main()':
street_lamps.cpp:289:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  289 |         freopen(TASK".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 34 ms 66156 KB Output is correct
2 Correct 39 ms 65976 KB Output is correct
3 Correct 33 ms 66084 KB Output is correct
4 Correct 34 ms 66068 KB Output is correct
5 Correct 34 ms 66028 KB Output is correct
6 Correct 34 ms 66064 KB Output is correct
7 Correct 33 ms 66016 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 211 ms 74396 KB Output is correct
2 Correct 238 ms 74828 KB Output is correct
3 Correct 310 ms 75884 KB Output is correct
4 Correct 724 ms 100100 KB Output is correct
5 Correct 838 ms 101328 KB Output is correct
6 Correct 762 ms 100392 KB Output is correct
7 Correct 237 ms 75452 KB Output is correct
8 Correct 229 ms 76912 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 40 ms 66140 KB Output is correct
2 Correct 34 ms 66128 KB Output is correct
3 Correct 35 ms 66128 KB Output is correct
4 Correct 39 ms 66076 KB Output is correct
5 Correct 1006 ms 100392 KB Output is correct
6 Correct 941 ms 103636 KB Output is correct
7 Correct 768 ms 100580 KB Output is correct
8 Correct 241 ms 76816 KB Output is correct
9 Correct 112 ms 71644 KB Output is correct
10 Correct 129 ms 72120 KB Output is correct
11 Correct 120 ms 72232 KB Output is correct
12 Correct 232 ms 75472 KB Output is correct
13 Correct 240 ms 76996 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 35 ms 66132 KB Output is correct
2 Correct 34 ms 66168 KB Output is correct
3 Correct 34 ms 66196 KB Output is correct
4 Correct 34 ms 66180 KB Output is correct
5 Correct 409 ms 94380 KB Output is correct
6 Correct 575 ms 97548 KB Output is correct
7 Correct 778 ms 99844 KB Output is correct
8 Correct 968 ms 102224 KB Output is correct
9 Correct 264 ms 74416 KB Output is correct
10 Correct 267 ms 73656 KB Output is correct
11 Correct 273 ms 74596 KB Output is correct
12 Correct 255 ms 73592 KB Output is correct
13 Correct 278 ms 74444 KB Output is correct
14 Correct 255 ms 73640 KB Output is correct
15 Correct 239 ms 75412 KB Output is correct
16 Correct 241 ms 76976 KB Output is correct

Subtask #5
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 34 ms 66156 KB Output is correct
2 Correct 39 ms 65976 KB Output is correct
3 Correct 33 ms 66084 KB Output is correct
4 Correct 34 ms 66068 KB Output is correct
5 Correct 34 ms 66028 KB Output is correct
6 Correct 34 ms 66064 KB Output is correct
7 Correct 33 ms 66016 KB Output is correct
8 Correct 211 ms 74396 KB Output is correct
9 Correct 238 ms 74828 KB Output is correct
10 Correct 310 ms 75884 KB Output is correct
11 Correct 724 ms 100100 KB Output is correct
12 Correct 838 ms 101328 KB Output is correct
13 Correct 762 ms 100392 KB Output is correct
14 Correct 237 ms 75452 KB Output is correct
15 Correct 229 ms 76912 KB Output is correct
16 Correct 40 ms 66140 KB Output is correct
17 Correct 34 ms 66128 KB Output is correct
18 Correct 35 ms 66128 KB Output is correct
19 Correct 39 ms 66076 KB Output is correct
20 Correct 1006 ms 100392 KB Output is correct
21 Correct 941 ms 103636 KB Output is correct
22 Correct 768 ms 100580 KB Output is correct
23 Correct 241 ms 76816 KB Output is correct
24 Correct 112 ms 71644 KB Output is correct
25 Correct 129 ms 72120 KB Output is correct
26 Correct 120 ms 72232 KB Output is correct
27 Correct 232 ms 75472 KB Output is correct
28 Correct 240 ms 76996 KB Output is correct
29 Correct 35 ms 66132 KB Output is correct
30 Correct 34 ms 66168 KB Output is correct
31 Correct 34 ms 66196 KB Output is correct
32 Correct 34 ms 66180 KB Output is correct
33 Correct 409 ms 94380 KB Output is correct
34 Correct 575 ms 97548 KB Output is correct
35 Correct 778 ms 99844 KB Output is correct
36 Correct 968 ms 102224 KB Output is correct
37 Correct 264 ms 74416 KB Output is correct
38 Correct 267 ms 73656 KB Output is correct
39 Correct 273 ms 74596 KB Output is correct
40 Correct 255 ms 73592 KB Output is correct
41 Correct 278 ms 74444 KB Output is correct
42 Correct 255 ms 73640 KB Output is correct
43 Correct 239 ms 75412 KB Output is correct
44 Correct 241 ms 76976 KB Output is correct
45 Correct 121 ms 71076 KB Output is correct
46 Correct 158 ms 71300 KB Output is correct
47 Correct 382 ms 81348 KB Output is correct
48 Correct 774 ms 99788 KB Output is correct
49 Correct 126 ms 72500 KB Output is correct
50 Correct 122 ms 72456 KB Output is correct
51 Correct 135 ms 72752 KB Output is correct
52 Correct 130 ms 73004 KB Output is correct
53 Correct 127 ms 72868 KB Output is correct
54 Correct 151 ms 73024 KB Output is correct