Submission #568849

#	Time	Username	Problem	Language	Result	Execution time	Memory
568849		birthdaycake	Street Lamps (APIO19_street_lamps)	C++17	20 / 100	342 ms	2152 KiB

street_lamps

#include<bits/stdc++.h>
#define int long long
#define endl '\n'
#define mod 1000000007
#define boost ios_base::sync_with_stdio(false), cin.tie(NULL);
using namespace std;
 
 
 
int pref[300001],sub[300001],ans[300001];
 
signed main() {
 
    int n,q; cin >> n >> q;
    string a; cin >> a;
    if(n <= 100 && q <= 100){
        for(int i = 0; i < n; i++){
            if(a[i] == '1') pref[i]++;
            if(i) pref[i] += pref[i - 1];
            sub[i] = pref[i];
        }
        vector<pair<string,pair<int,int>>>qw(q);
        for(int i = 0; i < q; i++){
            cin >> qw[i].first >> qw[i].second.first;
            if(qw[i].first != "toggle") cin >> qw[i].second.second;
            else qw[i].second.second = 0;
            int a = qw[i].second.first - 1, b = qw[i].second.second - 1;
            if(qw[i].first == "query"){
                int ans = 0;
                for(int j = 0; j <= i; j++){
                    if(qw[j].first == "query"){
                        if(sub[b - 1] - (a == 0 ? 0 : sub[a - 1]) == (b - a)) ans++;
                    }else{
                        if(sub[b - 1] - (a == 0 ? 0 : sub[a - 1]) == (b - a)) ans++;
                        int c = qw[j].second.first - 1;
                        if(sub[c] - (c == 0 ? 0 : sub[c - 1]) == 1){
                            for(int k = c; k < n; k++) sub[k]--;
                        }else{
                            for(int k = c; k < n; k++) sub[k]++;
                        }
                    }
                }
                cout << ans << endl;
                for(int j = 0; j < n; j++){
                    sub[j] = pref[j];
                }
            }
            
            
        }
        return 0;
    }
    for(int i = 0; i < q; i++){
        string t; cin >> t;
        if(t == "toggle"){
            int x; cin >> x;
            x--;
            if(a[x] == '1') ans[x]++;
            if(a[x] == '1') a[x] = '0';
            else a[x] = '1';
        }else{
            int x,y; cin >> x >> y;
            x--;
            if(a[x] == '1') ans[x]++;
            cout << ans[x] << endl;
        }
    }
    return 0;
}

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