QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#810993#9810. Obliviate, Then ReincarnateFalse0099WA 856ms92920kbC++203.4kb2024-12-12 14:21:592024-12-12 14:21:59

Judging History

This is the latest submission verdict.

  • [2024-12-12 14:21:59]
  • Judged
  • Verdict: WA
  • Time: 856ms
  • Memory: 92920kb
  • [2024-12-12 14:21:59]
  • Submitted

answer

#include <bits/stdc++.h>
using namespace std;
#define int long long

const int N = 2e6 + 10, M = 2e6 + 10;

int n, m, mod;
int h[N], e[M << 1], ne[M << 1], idx, val[N]; // 原图参数
/*tarjan中间量*/
int dfn[N], low[N], timestamp;
int stk[N], top;
bool in_stk[N];
/*tarjan中间量*/
int id[N], scc_size[N];          // 新旧关系
int scc_cnt;                     // 新图的n
int hs[N], sum[N], dp[N], in[N]; // 新图的参数
int ans;
bool vis[N];
void add(int h[], int a, int b)
{
    e[idx] = b, ne[idx] = h[a], h[a] = idx++;
}

void tarjan(int u)
{
    dfn[u] = low[u] = ++timestamp;
    stk[++top] = u, in_stk[u] = true;
    for (int i = h[u]; ~i; i = ne[i])
    {
        int j = e[i];
        if (!dfn[j])
        {
            tarjan(j);
            low[u] = min(low[u], low[j]);
        }
        else if (in_stk[j])
            low[u] = min(low[u], dfn[j]);
    }
    if (dfn[u] == low[u])
    {
        ++scc_cnt;
        int y;
        do
        {
            y = stk[top--];
            in_stk[y] = false;
            id[y] = scc_cnt;
            sum[scc_cnt] += val[y]; // 处理我们的合并点
            scc_size[scc_cnt]++;
            dp[scc_cnt] |= vis[y];
        } while (y != u);
    }
}

void topsort()
{
    queue<int> q;
    for (int i = 1; i <= scc_cnt; i++)
    {
        if (in[i] == 0)
        {
            q.push(i);
        }
    }
    while (!q.empty())
    {
        int now = q.front();
        q.pop();
        for (int i = hs[now]; i != -1; i = ne[i])
        {
            int v = e[i];
            in[v]--;
            dp[v] = (dp[v] | dp[now]);
            if (in[v] == 0)
            {
                q.push(v);
            }
        }
    }
}

signed main()
{
    memset(h, -1, sizeof h);
    memset(hs, -1, sizeof hs);
    int q;
    cin >> n >> m >> q;
    set<array<int, 2>> edges;
    while (m--)
    {
        int a, b;
        cin >> a >> b;
        a %= n;
        // b %= n;
        a = (a + n) % n;
        if (b == 0)
        {
            continue;
        }
        else
        {
            if (b == n)
            {
                vis[a] = 1;
            }
            b %= n;
            // b = (b + n) % n;
            if (a + b >= n || a + b < 0)
            {
                vis[a] = 1;
            }
            edges.insert({a, (a + b + n) % n});
           // cerr << a << " " << (a + b + n) % n << endl;
            add(h, a, (a + b + n) % n);
        }
    }

    for (int i = 1; i <= n; i++)
    {
        if (!dfn[i])
        {
            tarjan(i);
        }
    }

    for (int i = 1; i <= n; i++)
    {
        for (int j = h[i]; ~j; j = ne[j])
        {
            int k = e[j];
            int a = id[i], b = id[k];
            if (a != b)
            {
                add(hs, b, a);
                in[a]++;
            }
        }
    }
    for (int i = 0; i < n; i++)
    {
        if (edges.count({i, i}))
        {
            dp[id[i]] = 1;
        }
    }
    topsort();
    // cerr << "q" << endl;
    while (q--)
    {
        int u;
        cin >> u;
        u %= n;
        u = (u + n) % n;
        //cerr << u << " " << id[u] << endl;
        if (dp[id[u]] == true)
        {
            cout << "Yes" << endl;
        }
        else
        {
            cout << "No" << endl;
        }
    }
    // cout << ans << endl;
}

Details

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Test #1:

score: 100
Accepted
time: 0ms
memory: 46728kb

input:

3 2 3
1 1
-1 3
1
2
3

output:

Yes
Yes
No

result:

ok 3 tokens

Test #2:

score: 0
Accepted
time: 0ms
memory: 46552kb

input:

3 2 3
1 1
-1 0
1
2
3

output:

No
No
No

result:

ok 3 tokens

Test #3:

score: 0
Accepted
time: 4ms
memory: 45160kb

input:

1 1 1
0 1000000000
-1000000000

output:

Yes

result:

ok "Yes"

Test #4:

score: 0
Accepted
time: 0ms
memory: 44608kb

input:

3 2 3
0 1000000000
1 -1000000000
-1000000000
0
-1000000000

output:

No
No
No

result:

ok 3 tokens

Test #5:

score: -100
Wrong Answer
time: 856ms
memory: 92920kb

input:

50134 500000 500000
-154428638 -283522863
-186373509 -327130969
154999046 46750274
-933523447 349415487
-437683609 140099255
864996699 -262318199
811293034 -264299324
120273173 52410685
874944410 -52048424
445049930 -803690605
-138111276 -104634331
720288580 126597671
471164416 -348777147
-356502322...

output:

Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
...

result:

wrong answer 1st words differ - expected: 'No', found: 'Yes'