Submission #721715

#	Time	Username	Problem	Language	Result	Execution time	Memory
721715		victor_gao	Street Lamps (APIO19_street_lamps)	C++17	20 / 100	1 ms	596 KiB

street_lamps

//#pragma GCC optimize("Ofast,unroll-loops,O3")
//#pragma GCC optimize("avx,avx2,sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,fma,tune=native")
#include<bits/stdc++.h>
//#include<bits/extc++.h>
//#pragma pack(1)
#define fast ios::sync_with_stdio(0); cin.tie(0);
#define int long long
#define pii pair<int,int>
#define x first
#define y second
using namespace std;
//using namespace __gnu_pbds;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
//typedef tree<int, null_type,less_equal<int>, rb_tree_tag,tree_order_statistics_node_update> order_multiset;
//typedef tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update> order_set;
int s[105][105],n,q;
bool arr[105];
signed main(){
    fast
    cin>>n>>q;
    for (int i=1;i<=n;i++){
        char c; cin>>c;
        arr[i]=c-'0';
        s[1][i]=arr[i]+s[1][i-1];
    }
    for (int t=2;t<=q+1;t++){
        string str; cin>>str;
        if (str=="toggle"){
            int p; cin>>p;
            arr[p]^=1;
        }
        else {
            int ans=0,l,r; cin>>l>>r;
            for (int i=1;i<t;i++){
                if (s[i][r-1]-s[i][l-1]==r-l)
                    ans++;
            }
            cout<<ans<<'\n';
        }
        for (int i=1;i<=n;i++)
            s[t][i]=arr[i]+s[t][i-1];
    }
}

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