Submission #211400

#	Time	Username	Problem	Language	Result	Execution time	Memory
211400		VEGAnn	Street Lamps (APIO19_street_lamps)	C++14	20 / 100	5072 ms	7028 KiB

street_lamps

#include <bits/stdc++.h>
#define all(x) x.begin(),x.end()
#define sz(x) ((int)x.size())
#define pll pair<ll, ll>
#define MP make_pair
#define PB push_back
using namespace std;
typedef long long ll;
const int N = 300100;
const int M = 300100;
const int oo = 2e9;
string qr, s, t;
int n, q, loc[M], ans;
bool typ[M];

bool check(int l, int r){
    for (int i = l; i < r; i++)
        if (t[i] == '0')
            return 0;
    return 1;
}

int main(){

#ifdef _LOCAL
    freopen("in.txt","r",stdin);
#else
    ios_base::sync_with_stdio(0); cin.tie(0);
#endif // _LOCAL

    cin >> n >> q >> s;

    for (int i = 0; i < q; i++){
        cin >> qr;

        if (qr[0] == 't'){
            typ[i] = 1;

            cin >> loc[i];
            loc[i]--;
        } else{
            int l, r; cin >> l >> r;
            l--; r--;
            ans = 0;

            t = s;

            for (int j = 0; j <= i; j++) {
                ans += check(l, r);
                if (typ[j]) {
                    t[loc[j]] = (t[loc[j]] == '1' ? '0' : '1');
                }
            }

            cout << ans << '\n';
        }
    }

    return 0;
}

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