Submission #982971

#	Time	Username	Problem	Language	Result	Execution time	Memory
982971		vjudge1	Street Lamps (APIO19_street_lamps)	C++17	20 / 100	133 ms	4432 KiB

street_lamps

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


ll cnt[105][105];
void solve()
{
    ll n, q, i, j, k;
    cin >> n >> q;
    string s;
    cin >> s;

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

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