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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#783080 | #9810. Obliviate, Then Reincarnate | KobicGend | WA | 275ms | 22052kb | C++23 | 3.3kb | 2024-11-25 23:12:59 | 2024-11-25 23:13:01 |
Judging History
This is the latest submission verdict.
- [2024-11-26 23:19:26]
- hack成功,自动添加数据
- (/hack/1260)
- [2024-11-25 23:12:59]
- Submitted
answer
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
struct SCC {
int n, unix, tot;
vector<vector<int>> E;
vector<int> dfn, low, bel, stk;
SCC(int n) : n(n), unix(0), tot(0), E(n), dfn(n, -1), low(n), bel(n, -1) {}
void add(int u, int v) {
E[u].push_back(v);
}
void dfs(int u) {
dfn[u] = low[u] = unix++; // 记录DFS序
stk.push_back(u);
// DP更新low[u]
for (auto& v : E[u]) {
if (dfn[v] == -1) dfs(v), low[u] = min(low[u], low[v]);
else if (bel[v] == -1) low[u] = min(low[u], dfn[v]);
}
// u是SCC的根
if (dfn[u] == low[u]) {
int v;
do {
v = stk.back();
stk.pop_back(); // 出栈
bel[v] = tot; // 记录u的子节点的根为u
} while (v != u); // 不断弹出直到根u弹出为止
tot++; // 记录SCC的数量
}
}
struct Graph {
int n;
vector<vector<int>> E;
vector<int> ecnt, pcnt, bel;
Graph(int n) : n(n), E(n), ecnt(n), pcnt(n) {}
};
Graph work() {
for (int u = 0; u < n; u++) {
if (dfn[u] == -1) dfs(u);
}
Graph G(tot);
G.bel = bel;
for (int u = 0; u < n; u++) {
for (auto& v : E[u]) {
if (bel[u] != bel[v]) G.E[bel[u]].push_back(bel[v]); // bel[u]总是小于p[v]
else G.ecnt[bel[u]]++;
}
G.pcnt[bel[u]]++;
}
for (auto& vec : G.E) {
sort(vec.begin(), vec.end());
vec.erase(unique(vec.begin(), vec.end()), vec.end());
}
return G;
}
template<typename T>
vector<T> compress(const vector<T>& w) {
vector<T> res(tot);
for (int u = 0; u < n; u++) {
res[bel[u]] += w[u];
}
return res;
}
};
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr), cout.tie(nullptr);
int n, m, q;
cin >> n >> m >> q;
vector<vector<pair<int, int>>> E(n);
SCC G(n);
while (m--) {
int u, w;
cin >> u >> w;
int v = u + w;
u = (u % n + n) % n;
v = (v % n + n) % n;
G.add(u, v);
E[u].push_back({ w, v });
}
auto g = G.work();
vector<int> vis(n);
vector<ll> val(n);
queue<int> Q;
for (int u = 0; u < n; u++) {
Q.push(u);
}
while (!Q.empty()) {
int u = Q.front(); Q.pop();
vis[u] = 1;
for (auto [w, v] : E[u]) {
if (vis[v]) continue;
val[v] = val[u] + w;
Q.push(v);
}
}
vector<int> bad(g.n);
for (int u = 0; u < n; u++) {
for (auto [w, v] : E[u]) {
if (g.bel[u] == g.bel[v] && val[u] + w != val[v]) {
bad[g.bel[u]] = 1;
}
}
}
for (int u = 0; u < g.n; u++) {
for (auto v : g.E[u]) {
bad[u] |= bad[v];
}
}
while (q--) {
int u;
cin >> u;
u = (u % n + n) % n;
cout << (bad[g.bel[u]] ? "Yes" : "No") << endl;
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3624kb
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: 3568kb
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: 0ms
memory: 3564kb
input:
1 1 1 0 1000000000 -1000000000
output:
Yes
result:
ok "Yes"
Test #4:
score: 0
Accepted
time: 0ms
memory: 3600kb
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: 275ms
memory: 22052kb
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'