Submission #522222

#	Time	Username	Problem	Language	Result	Execution time	Memory
522222		Aldas25	Street Lamps (APIO19_street_lamps)	C++14	20 / 100	81 ms	1668 KiB

street_lamps

#include <bits/stdc++.h>

using namespace std;

#define FAST_IO ios_base::sync_with_stdio(0); cin.tie(nullptr)
#define FOR(i, a, b) for (int i = (a); i <= (b); i++)
#define REP(n) FOR(O, 1, (n))
#define f first
#define s second
#define pb push_back
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<pii> vii;
typedef vector<ll> vl;

const int MAXN = 500100;

int n, q;
bool lamp[MAXN];
bool intervals[110][110];

void saveIntervals (int time) {
    FOR(i, 1, n) intervals[time][i] = lamp[i];
}

int query (int a, int b, int time) {
    int ret = 0;
    FOR(t, 0, time-1) {
        bool ok = true;
        FOR(i, a, b-1) {
            if (!intervals[t][i])
                ok = false;
        }
        if (ok) ret++;
    }

    return ret;
}

int main()
{
    FAST_IO;

    cin >> n >> q;
    string s;
    cin >> s;
    FOR(i, 0, n-1) {
        lamp[i+1] = (s[i] == '1');
    }

    saveIntervals (0);

    FOR(i, 1, q) {

        string t;
        cin >> t;
        if (t[0] == 'q') {
            int a, b;
            cin >> a >> b;
            cout << query(a,b, i) << "\n";
        } else {
            int id; cin >> id;
            lamp[id] = !lamp[id];
        }

        saveIntervals (i);
    }

    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20