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Submission #983243

# Submission time Handle Problem Language Result Execution time Memory
983243 2024-05-15T09:43:13 Z vjudge1 Street Lamps (APIO19_street_lamps) C++17
40 / 100
 166 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, q);
            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 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 604 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 604 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 75 ms 15296 KB Output is correct
2 Correct 79 ms 15456 KB Output is correct
3 Correct 105 ms 15664 KB Output is correct
4 Correct 124 ms 22516 KB Output is correct
5 Correct 110 ms 22964 KB Output is correct
6 Correct 124 ms 22524 KB Output is correct
7 Correct 124 ms 22560 KB Output is correct
8 Correct 166 ms 23812 KB Output is correct

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8536 KB Output is correct
2 Incorrect 2 ms 8536 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 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 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 604 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 75 ms 15296 KB Output is correct
9 Correct 79 ms 15456 KB Output is correct
10 Correct 105 ms 15664 KB Output is correct
11 Correct 124 ms 22516 KB Output is correct
12 Correct 110 ms 22964 KB Output is correct
13 Correct 124 ms 22524 KB Output is correct
14 Correct 124 ms 22560 KB Output is correct
15 Correct 166 ms 23812 KB Output is correct
16 Correct 1 ms 8536 KB Output is correct
17 Incorrect 2 ms 8536 KB Output isn't correct
18 Halted 0 ms 0 KB -