oj.uz

Submission #987856

# Submission time Handle Problem Language Result Execution time Memory
987856 2024-05-23T16:53:31 Z 876pol Street Lamps (APIO19_street_lamps) C++17
60 / 100
 5000 ms 29928 KB 
#include <bits/stdc++.h>

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

using ll = long long;
using int128 = __int128_t;
using pll = pair<ll, ll>;
template <class T>
using vec = vector<T>;
template <class T>
using indexed_set =
    tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

#define FOR(i, s, e) for (ll i = (ll)s; i < (ll)e; i++)
#define CFOR(i, s, e) for (ll i = (ll)s; i <= (ll)e; i++)
#define TRAV(e, a) for (const auto &e : a)
#define all(x) x.begin(), x.end()
#define dbg(x) cerr << "ln" << __LINE__ << ": " << #x << " = " << x << endl;

template <class T, class = decay_t<decltype(*begin(declval<T>()))>,
          class = enable_if_t<!is_same<T, string>::value>>
ostream &operator<<(ostream &out, const T &obj) {
    out << "[";
    for (auto it = obj.begin(); it != obj.end(); it++) {
        out << &", "[2 * (it == obj.begin())] << *it;
    }
    return out << "]";
}

template <class K, class V>
ostream &operator<<(ostream &out, const pair<K, V> &obj) {
    return out << "(" << obj.first << ", " << obj.second << ")";
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    bool st2 = 1, st3 = 1;
    ll n, q;
    cin >> n >> q;
    string s;
    cin >> s;
    string ts(s);
    vec<vec<ll>> queries(q, vec<ll>(3));
    FOR(i, 0, q) {
        string op;
        cin >> op;
        queries[i][0] = (op == "query");
        if (queries[i][0]) {
            cin >> queries[i][1] >> queries[i][2];
            st2 &= (queries[i][1] + 1 == queries[i][2]);
        } else {
            cin >> queries[i][1];
            st3 &= (ts[queries[i][1] - 1] == '0');
            ts[queries[i][1] - 1] = '1';
        }
    }
    if (st2) {
        vec<ll> illum(n + 1), hours(n + 1);
        CFOR(i, 1, n) illum[i] = (s[i - 1] == '1') ? 0 : -1;
        FOR(i, 0, q) {
            if (queries[i][0]) {
                if (illum[queries[i][1]] == -1) {
                    cout << hours[queries[i][1]] << "\n";
                } else {
                    cout << hours[queries[i][1]] + (i + 1) -
                                illum[queries[i][1]]
                         << "\n";
                }
            } else {
                if (illum[queries[i][1]] == -1) {
                    illum[queries[i][1]] = i + 1;
                } else {
                    hours[queries[i][1]] += (i + 1) - illum[queries[i][1]];
                    illum[queries[i][1]] = -1;
                }
            }
        }
    } else if (st3) {
#define lc(v) (v + 1)
#define rc(v) (v + 2 * (tm - tl + 1))
        vec<ll> seg(2 * n, 1e9);
        function<void(ll, ll, ll, ll, ll)> update = [&](ll v, ll tl, ll tr,
                                                        ll ind, ll x) {
            if (tl == tr && tl == ind) {
                seg[v] = x;
            } else {
                ll tm = (tl + tr) / 2;
                if (ind <= tm) {
                    update(lc(v), tl, tm, ind, x);
                } else {
                    update(rc(v), tm + 1, tr, ind, x);
                }
                seg[v] = max(seg[lc(v)], seg[rc(v)]);
            }
        };
        function<ll(ll, ll, ll, ll, ll)> query = [&](ll v, ll tl, ll tr, ll l,
                                                     ll r) -> ll {
            if (r < tl || tr < l) return 0;
            if (l <= tl && tr <= r) return seg[v];
            ll tm = (tl + tr) / 2;
            return max(query(lc(v), tl, tm, l, r),
                       query(rc(v), tm + 1, tr, l, r));
        };
        CFOR(i, 1, n) {
            if (s[i - 1] == '1') update(0, 1, n, i, 0);
        }
        FOR(i, 0, q) {
            if (queries[i][0]) {
                ll mx = query(0, 1, n, queries[i][1], queries[i][2] - 1);
                if (mx == 1e9) {
                    cout << "0\n";
                } else {
                    cout << (i + 1) - mx << "\n";
                }
            } else {
                update(0, 1, n, queries[i][1], i + 1);
            }
        }
    } else {
        FOR(i, 0, q) {
            if (queries[i][0]) {
                vec<ll> range(queries[i][2] - queries[i][1]);
                FOR(j, queries[i][1] - 1, queries[i][2] - 1) {
                    range[j - queries[i][1] + 1] = s[j] - '0';
                }
                ll cnt = accumulate(all(range), 0ll);
                ll ans = (cnt == range.size());
                FOR(j, 0, i) {
                    if (queries[j][0] == 0) {
                        ll ind = queries[j][1] - 1 - (queries[i][1] - 1);
                        if (ind < range.size()) {
                            cnt -= range[ind];
                            range[ind] ^= 1;
                            cnt += range[ind];
                        }
                    }
                    ans += (cnt == range.size());
                }
                cout << ans << "\n";
            }
        }
    }
}

Compilation message

street_lamps.cpp: In function 'int main()':
street_lamps.cpp:132:31: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int, std::allocator<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  132 |                 ll ans = (cnt == range.size());
      |                           ~~~~^~~~~~~~~~~~~~~
street_lamps.cpp:136:33: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int, std::allocator<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  136 |                         if (ind < range.size()) {
      |                             ~~~~^~~~~~~~~~~~~~
street_lamps.cpp:142:33: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int, std::allocator<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  142 |                     ans += (cnt == range.size());
      |                             ~~~~^~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 67 ms 17748 KB Output is correct
2 Correct 71 ms 17748 KB Output is correct
3 Correct 72 ms 17740 KB Output is correct
4 Correct 83 ms 22756 KB Output is correct
5 Correct 82 ms 23016 KB Output is correct
6 Correct 74 ms 22756 KB Output is correct
7 Correct 88 ms 22760 KB Output is correct
8 Correct 90 ms 24144 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 420 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 141 ms 22248 KB Output is correct
6 Correct 176 ms 22336 KB Output is correct
7 Correct 233 ms 27588 KB Output is correct
8 Correct 309 ms 29928 KB Output is correct
9 Correct 90 ms 17256 KB Output is correct
10 Correct 94 ms 18924 KB Output is correct
11 Correct 104 ms 19000 KB Output is correct
12 Correct 236 ms 28596 KB Output is correct
13 Correct 297 ms 29924 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 348 KB Output is correct
2 Correct 2 ms 348 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Execution timed out 5047 ms 21796 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 67 ms 17748 KB Output is correct
9 Correct 71 ms 17748 KB Output is correct
10 Correct 72 ms 17740 KB Output is correct
11 Correct 83 ms 22756 KB Output is correct
12 Correct 82 ms 23016 KB Output is correct
13 Correct 74 ms 22756 KB Output is correct
14 Correct 88 ms 22760 KB Output is correct
15 Correct 90 ms 24144 KB Output is correct
16 Correct 1 ms 420 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 141 ms 22248 KB Output is correct
21 Correct 176 ms 22336 KB Output is correct
22 Correct 233 ms 27588 KB Output is correct
23 Correct 309 ms 29928 KB Output is correct
24 Correct 90 ms 17256 KB Output is correct
25 Correct 94 ms 18924 KB Output is correct
26 Correct 104 ms 19000 KB Output is correct
27 Correct 236 ms 28596 KB Output is correct
28 Correct 297 ms 29924 KB Output is correct
29 Correct 2 ms 348 KB Output is correct
30 Correct 2 ms 348 KB Output is correct
31 Correct 2 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Execution timed out 5047 ms 21796 KB Time limit exceeded
34 Halted 0 ms 0 KB -