Submission #982981

#	Time	Username	Problem	Language	Result	Execution time	Memory
982981		vjudge1	Street Lamps (APIO19_street_lamps)	C++17	20 / 100	30 ms	2132 KiB

street_lamps

#include<bits/stdc++.h>
#define sz size()
#define ll long long
using namespace std;


ll cnt[205][205];
void solve()
{
    ll n, q, i, j, k;
    cin >> n >> q;
    string s;
    cin >> s;

    ll a[n + 1], sum[n + 1], lst[n + 1] = {};
    for(i = 1; i <= n; ++i)
        a[i] = s[i - 1] - '0',
        sum[i] = a[i];

    if(n <= 200 && q <= 200)
    {
        for(i = 1; i <= n; ++i)
            for(j = i; j <= n; ++j)
            {
                if(!a[j]) break;
                ++cnt[i][j];
            }
        while(q--)
        {
            cin >> s;
            ll l, r;
            if(s == "toggle")
                cin >> l,
                a[l] ^= 1;
            else
                cin >> l >> r,
                cout << cnt[l][r - 1] << '\n';
            for(i = 1; i <= n; ++i)
                for(j = i; j <= n; ++j)
                {
                    if(!a[j]) break;
                    ++cnt[i][j];
                }
        }
    }


    for(i = 1; i <= q; ++i)
    {
        cin >> s;
        ll l, r;
        if(s == "toggle")
        {
            cin >> l;
            sum[l] += (i - lst[l]) * a[l];
            a[l] ^= 1;
            lst[l] = i;
        }
        cin >> l >> r;
        cout << sum[l] + (i - lst[l]) * a[l] << '\n';
    }

}

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    solve();
}

Compilation message (stderr)

street_lamps.cpp: In function 'void solve()':
street_lamps.cpp:10:20: warning: unused variable 'k' [-Wunused-variable]
   10 |     ll n, q, i, j, k;
      |                    ^

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