Submission #858289

#	Time	Username	Problem	Language	Result	Execution time	Memory
858289		12345678	Street Lamps (APIO19_street_lamps)	C++17	20 / 100	76 ms	10980 KiB

street_lamps

#include <bits/stdc++.h>

using namespace std;

const int nx=3e5+5;
int n, q, lst[nx], sm[nx], l, a, b;
string s;

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n>>q>>s;
    for (int i=1; i<=n; i++) lst[i]=(s[i-1]-'0')-1;
    for (int i=1; i<=q; i++)
    {
        cin>>s;
        if (s[0]=='t')
        {
            cin>>l;
            if (lst[l]==-1) lst[l]=i;
            else sm[l]+=(i-lst[l]), lst[l]=-1;
        }
        else
        {
            cin>>a>>b;
            if (lst[a]!=-1) cout<<sm[a]+(i-lst[a])<<'\n';
            else cout<<sm[a]<<'\n';
        }
    }
}

/*
5 7
11111
query 1 2
query 2 3
query 3 4
query 4 5
query 5 6
toggle 1
query 1 2
*/

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