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Submission #983293

# Submission time Handle Problem Language Result Execution time Memory
983293 2024-05-15T09:59:27 Z vjudge1 Strange Device (APIO19_strange_device) C++17
0 / 100
 3 ms 10588 KB 
#include<bits/stdc++.h>
#define sz size()
#define ll long long
using namespace std;
const ll N = 4e6;

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 st;
    cin >> st;

    ll a[n + 1], sum[n + 1] = {}, lst[n + 1] = {};
    for(i = 1; i <= n; ++i)
        a[i] = st[i - 1] - '0',
        fupd(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 >> st;
            ll l, r;
            if(st == "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)
        {
            st = s1[i];
            ll l = l1[i], r = r1[i];
            if(st == "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)
    {
        st = s1[i];
        ll l = l1[i], r = r1[i];
        if(st == "toggle")
        {
            a[i] ^= 1;
            fupd(l, a[i]);
            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

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

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 10584 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 10584 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 10588 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 10588 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 10588 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 10588 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 10588 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 10584 KB Output isn't correct
2 Halted 0 ms 0 KB -