oj.uz

Submission #1005562

# Submission time Handle Problem Language Result Execution time Memory
1005562 2024-06-22T15:40:00 Z underwaterkillerwhale Street Lamps (APIO19_street_lamps) C++17
40 / 100
 104 ms 18152 KB 
//#ifdef ONLINE_JUDGE
//    #include "cyberland.h"
//#endif

#include <bits/stdc++.h>
#define se              second
#define fs              first
#define mp              make_pair
#define pb              push_back
#define ll              long long
#define ii              pair<ll,ll>
#define ld              long double
#define SZ(v)           (int)v.size()
#define ALL(v)          v.begin(), v.end()
#define bit(msk, i)     ((msk >> i) & 1)
#define iter(id, v)     for(auto id : v)
#define rep(i,m,n)      for(int i=(m); i<=(n); i++)
#define reb(i,m,n)      for(int i=(m); i>=(n); i--)

using namespace std;

mt19937_64 rd(chrono :: steady_clock :: now().time_since_epoch().count());
ll Rand(ll l, ll r) { return uniform_int_distribution<ll> (l, r)(rd); }

const int N  = 3e5 + 2;
const ll Mod = 998244353;
const int szBL = 50;
const int INF = 1e9 + 7;
const int BASE = 137;

struct Query {
    int typ, u, v;
};

int n, Q;
int a[N], b[N];
Query qr[N];

namespace sub1 {
    bool check (int L, int R) {
        rep (i, L, R - 1) if (a[i] == 0) return 0;
        return 1;
    }
    void solution() {
        rep (i, 1, Q) {
            if (qr[i].typ == 0) {
                a[qr[i].u] ^= 1;
            }
            else {
                int L = qr[i].u, R = qr[i].v;
                int res = 0;
                reb (t, i, 1) {
                    if (qr[t].typ == 0) a[qr[t].u] ^= 1;
                    if (check(L, R)) {
                        ++res;
                    }
                }
                rep (t, 1, i) if (qr[t].typ == 0)  a[qr[t].u] ^= 1;
                cout << res <<"\n";
            }
        }
    }
}
namespace sub2 {
    int cnt[N];
    bool check () {
        rep (i, 1, Q) if (qr[i].typ == 1 && (qr[i].u != qr[i].v - 1)) return 0;
        return 1;
    }
    void solution() {
        rep (i, 1, n) a[i] = b[i];
        rep (i, 1, Q) {
            if (qr[i].typ == 0) {
                int pos = qr[i].u;
                a[pos] ^= 1;
                if (a[pos] == 0) cnt[pos] += i;
                else cnt[pos] -= i;
            }
            else {
                int pos = qr[i].u;
                int res = cnt[pos];
                if (a[pos] == 1) res += i;
                cout << res <<"\n";
            }
        }
    }
}
namespace sub3 {
    bool check () {
        rep (i ,1, n) a[i] = b[i];
        rep (i, 1, Q) if (qr[i].typ == 0 && a[qr[i].u] == 0) return 0; else a[qr[i].u] ^= 1;
        return 1;
    }
    struct Segment_Tree {
        int Range;
        int st[N << 2];

        void init (int n) {
            Range = n;
        }
        void build (int id, int l, int r) {
            if (l== r) {
                st[id] = a[l] == 1 ? 0 : INF;
                return;
            }
            int mid = l + r >> 1;
            build (id << 1, l, mid);
            build (id << 1 | 1, mid + 1, r);
            st[id] = max(st[id << 1], st[id << 1 | 1]);
        }
        void update (int id, int l, int r, int pos, int val) {
            if (l > pos || r < pos) {
                return;
            }
            if (l == r) {
                st[id] = val;
                return;
            }
            int mid = l + r >> 1;
            update (id << 1, l, mid, pos, val);
            update (id << 1 | 1, mid + 1, r, pos, val);
            st[id] = max(st[id << 1], st[id << 1 | 1]);
        }
        int get (int id, int l, int r, int u, int v) {
            if (l > v || r < u) return 0;
            if (l >= u && r <= v) return st[id];
            int mid = l+ r >> 1;
            return max(get (id << 1, l, mid, u, v), get (id << 1 | 1, mid + 1, r, u, v));
        }
        void update (int u, int v) {
            return update (1, 1, Range, u, v);
        }
        int get (int L, int R) {
            return get (1, 1, Range, L, R);
        }
    }ST;

    void solution() {
        rep (i, 1, n) a[i] = b[i];
        ST.init(n);
        ST.build(1, 1, n);
        rep (i ,1, Q) {
            if (qr[i].typ == 0) ST.update(qr[i].u, i);
            else {
                if (ST.get(qr[i].u, qr[i].v) == INF) cout << 0 <<"\n";
                else cout << i - ST.get(qr[i].u, qr[i].v) <<"\n";
            }
        }
    }
}
void solution() {
    cin >> n >> Q;
    string s; cin >> s;
    rep (i, 1, n) a[i] = s[i - 1] - '0', b[i] = a[i];
    rep (i, 1, Q) {
        string s;
        cin >> s;
        if (s == "toggle") cin >> qr[i].u, qr[i].typ = 0;
        else cin >> qr[i].u >> qr[i].v, qr[i].typ = 1;
    }
    if (n <= 100 && Q <= 100)
        sub1 :: solution();
    else
        if (sub2 :: check())
        sub2 :: solution();
    else
        sub3 :: solution();
}
#define file(name) freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout);
int main () {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
//    file ("PAINT");
    int num_Test = 1;
//    cin >> num_Test;
    while (num_Test--)
        solution();
}

/*
5 7
11011
query 1 2
query 1 2
query 1 2
query 3 4
toggle 3
query 3 4
query 1 2



3 2
0 1 5
0 2 5
1
1 2

*/

Compilation message

street_lamps.cpp: In member function 'void sub3::Segment_Tree::build(int, int, int)':
street_lamps.cpp:106:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  106 |             int mid = l + r >> 1;
      |                       ~~^~~
street_lamps.cpp: In member function 'void sub3::Segment_Tree::update(int, int, int, int, int)':
street_lamps.cpp:119:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  119 |             int mid = l + r >> 1;
      |                       ~~^~~
street_lamps.cpp: In member function 'int sub3::Segment_Tree::get(int, int, int, int, int)':
street_lamps.cpp:127:24: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  127 |             int mid = l+ r >> 1;
      |                       ~^~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 39 ms 7516 KB Output is correct
2 Correct 59 ms 7368 KB Output is correct
3 Correct 45 ms 7508 KB Output is correct
4 Correct 52 ms 8936 KB Output is correct
5 Correct 54 ms 9116 KB Output is correct
6 Correct 38 ms 8928 KB Output is correct
7 Correct 57 ms 8880 KB Output is correct
8 Correct 60 ms 10136 KB Output is correct

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 65 ms 16872 KB Output is correct
6 Correct 86 ms 17448 KB Output is correct
7 Incorrect 104 ms 18152 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 4444 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 39 ms 7516 KB Output is correct
9 Correct 59 ms 7368 KB Output is correct
10 Correct 45 ms 7508 KB Output is correct
11 Correct 52 ms 8936 KB Output is correct
12 Correct 54 ms 9116 KB Output is correct
13 Correct 38 ms 8928 KB Output is correct
14 Correct 57 ms 8880 KB Output is correct
15 Correct 60 ms 10136 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 65 ms 16872 KB Output is correct
21 Correct 86 ms 17448 KB Output is correct
22 Incorrect 104 ms 18152 KB Output isn't correct
23 Halted 0 ms 0 KB -