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Submission #983257

# Submission time Handle Problem Language Result Execution time Memory
983257 2024-05-15T09:47:50 Z vjudge1 Street Lamps (APIO19_street_lamps) C++17
40 / 100
 122 ms 23812 KB 
#include<bits/stdc++.h>
#define sz size()
#define ll long long
using namespace std;
const ll N = 800800;

ll f[N], s[N], T = 1;
ll fget(ll i, ll res = 0)
{
    for(; i > 0; i -= (i & -i))
        res += f[i];
    return res;
}
void fupd(ll i, ll x)
{
    for(; i < N; i += (i & -i))
        f[i] += x;
}

ll get(ll l, ll r, ll res = 0)
{
    l += T - 1, r += T - 1;
    for(; l <= r; l >>= 1, r >>= 1)
    {
        if(l % 2 == 1) res = max(res, s[l++]);
        if(r % 2 == 0) res = max(res, s[r--]);
    }
    return res;
}
void upd(ll i, ll x)
{
    i += T - 1;
    s[i] = x;
    for(; i > 1; i >>= 1)
        s[i >> 1] = max(s[i], s[i ^ 1]);
}

ll cnt[205][205];
void solve()
{
    ll n, q, i, j, k;
    cin >> n >> q;
    while(T < n) T <<= 1;
    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';

    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];
                }
        }
        return;
    }

    string s1[q + 1];
    ll l1[q + 1], r1[q + 1];
    ll ok = 1;
    for(i = 1; i <= q; ++i)
    {
        cin >> s1[i] >> l1[i];
        if(s1[i] == "query")
        {
            cin >> r1[i];
            ok &= (r1[i] - l1[i] == 1);
        }
    }

    if(ok)
    {
        for(i = 1; i <= q; ++i)
        {
            s = s1[i];
            ll l = l1[i], r = r1[i];
            if(s == "toggle")
            {
                cin >> l;
                sum[l] += (i - lst[l]) * a[l];
                a[l] ^= 1;
                lst[l] = i;
                continue;
            }
            cin >> l >> r;
            cout << sum[l] + (i - lst[l]) * a[l] << '\n';
        }
        return;
    }

    for(i = 1; i <= q; ++i)
    {
        s = s1[i];
        ll l = l1[i], r = r1[i];
        if(s == "toggle")
        {
            fupd(l, 1);
            upd(l, i);
            continue;
        }
        ll ans = 0;
        if(fget(r - 1) - fget(l - 1) == r - l)
            ans = (i - get(l, r - 1));
        cout << ans << '\n';
    }

}

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

Compilation message

street_lamps.cpp: In function 'void solve()':
street_lamps.cpp:41:20: warning: unused variable 'k' [-Wunused-variable]
   41 |     ll n, q, i, j, k;
      |                    ^

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 600 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 15312 KB Output is correct
2 Correct 70 ms 15256 KB Output is correct
3 Correct 85 ms 15536 KB Output is correct
4 Correct 88 ms 22528 KB Output is correct
5 Correct 94 ms 23020 KB Output is correct
6 Correct 90 ms 22552 KB Output is correct
7 Correct 106 ms 22512 KB Output is correct
8 Correct 122 ms 23812 KB Output is correct

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8540 KB Output is correct
2 Incorrect 2 ms 8540 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 8540 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 600 KB Output is correct
8 Correct 76 ms 15312 KB Output is correct
9 Correct 70 ms 15256 KB Output is correct
10 Correct 85 ms 15536 KB Output is correct
11 Correct 88 ms 22528 KB Output is correct
12 Correct 94 ms 23020 KB Output is correct
13 Correct 90 ms 22552 KB Output is correct
14 Correct 106 ms 22512 KB Output is correct
15 Correct 122 ms 23812 KB Output is correct
16 Correct 2 ms 8540 KB Output is correct
17 Incorrect 2 ms 8540 KB Output isn't correct
18 Halted 0 ms 0 KB -