Submission #869994

#	Time	Username	Problem	Language	Result	Execution time	Memory
869994		Alora	Street Lamps (APIO19_street_lamps)	C++17	0 / 100	59 ms	688 KiB

street_lamps

#include <bits/stdc++.h>
#define Alora "cownav"
#define fi(i,a,b) for(int i = a; i <= b; i++)
#define fid(i,a,b) for(int i = a; i >= b; i--)
#define ll long long
#define f first
#define se second
#define pii pair<int, int>
#define getbit(i, j) ((i >> j) & 1)
#define all(v) v.begin(), v.end()
#define pb push_back
#define maxn 300005
const int M = 1e9 + 7;
using namespace std;
int n, m, st[maxn*4];
string s;

void build(int id, int l, int r){
    if(l == r){
        if(s[l] == '1') st[id] = 1e9;
        else st[id] = 0;
        return;
    }
    int m = (l + r)/2;
    build(id*2, l, m);
    build(id*2 + 1, m + 1, r);
    st[id] = min(st[id*2], st[id*2 + 1]);
}

void ud(int id, int l, int r, int u, int x){
    if(l > x || r < x) return;
    if(l == r) {st[id] = min(st[id], x); return;}
    int m = (l + r)/2;
    ud(id*2, l, m, u, x);
    ud(id*2 + 1, m + 1, r, u, x);
    st[id] = min(st[id*2], st[id*2 + 1]);
}

int get(int id, int l, int r, int u, int v){
    if(l > v || r < u) return 1e9;
    if(u <= l && r <= v) return st[id];
    int m = (l + r)/2;
    return min(get(id*2, l, m, u, v), get(id*2 + 1, m + 1, r, u, v));
}

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(NULL);
	
    cin >> n >> m;
    cin >> s; s = ' ' + s;
    build(1, 1, n);
    fi(i, 1, m){
        string c; cin >> c;
        if(c == "toggle"){
            int x; cin >> x;
            ud(1, 1, n, x, i - 1);
        }
        else{
            int a, b; cin >> a >> b;
            int x = get(1, 1, n, a, b - 1);
            cout << min(x, i) << '\n';
        }
    }
    return 0;
}

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