ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#214643 | #2681. How Many Paths? | WZRYWZWY | 35 | 1364ms | 29696kb | C++11 | 1.5kb | 2024-11-20 21:56:38 | 2024-11-20 23:09:54 |
answer
#include <bits/stdc++.h> // 自己写的
#define int long long
using namespace std;
const int N = 1e5 + 5, M = 1e6 + 5;
int dfn[N], low[N], sta[N], c[N]; // c[x] x所在强联通分量的编号
bool vis[N];
vector <int> scc[N], e[N], e2[N]; // 编号为i的强联通分量的所有点
int n, m, _dfn, top, cnt;
void tarjan(int u) {
dfn[u] = low[u] = ++ _dfn;
sta[++top] = u;
vis[u] = 1;
for (int v : e[u])
if (!dfn[v]) {
tarjan(v);
low[u] = min(low[u], low[v]);
} else if (vis[v]) low[u] = min(low[u], dfn[v]);
if (low[u] == dfn[u]) {
cnt ++;
int v;
do {
v = sta[top --];
vis[v] = 0;
c[v] = cnt;
scc[cnt].push_back(v);
} while (v != u);
}
}
bool vis2[N];
int f[N];
queue <int> q;
void bfs() {
while (q.size()) {
int u = q.front();
//cout << u << "\n";
q.pop();
for (int v : e2[u]) {
if (scc[v].size() > 1) f[v] = 1e18;
else f[v] ++;
q.push(v);
}
}
}
signed main() {
cin.tie(0); ios::sync_with_stdio(0);
int n, m; cin >> n >> m;
while (m--) {
int u, v; cin >> u >> v;
e[u].push_back(v);
}
for (int i = 1; i <= n; i++)
if (!dfn[i]) tarjan(i);
for (int u = 1; u <= n; u++)
for (int v : e[u]) {
if (c[u] == c[v]) continue;
e2[c[u]].push_back(c[v]);
}
e2[0].push_back(c[1]);
q.push(0);
bfs();
for (int i = 1; i <= n; i++) {
if (f[c[i]] == 1e18) cout << "3 ";
else if (f[c[i]] > 1) cout << "2 ";
else if (f[c[i]] == 1) cout << "1 ";
else cout << "0 ";
}
return 0;
}
详细
小提示:点击横条可展开更详细的信息
Test #1:
score: 0
Time Limit Exceeded
input:
50000 500000 27433 23782 1927 1159 20346 8794 27393 18828 40557 32372 29462 34217 31695 6752 2253 19...
output:
result:
Test #2:
score: 5
Accepted
time: 155ms
memory: 23520kb
input:
50000 500000 30894 37863 18739 43205 26461 20214 15741 957 38985 43365 15978 10327 7414 35300 17146 ...
output:
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ...
result:
ok single line: '1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 '
Test #3:
score: 5
Accepted
time: 246ms
memory: 27336kb
input:
50000 500000 38020 5057 495 7556 33072 22521 28583 41495 7199 42249 37197 26482 34166 16408 33429 19...
output:
1 0 2 0 0 2 0 0 0 2 2 2 2 0 0 0 0 2 2 2 0 2 2 0 0 2 0 0 0 0 0 0 0 0 2 0 0 0 0 2 0 0 0 2 0 2 2 0 1 0 ...
result:
ok single line: '1 0 2 0 0 2 0 0 0 2 2 2 2 0 0 ... 0 0 2 1 0 0 0 0 0 0 2 0 2 1 0 '
Test #4:
score: 0
Time Limit Exceeded
input:
50000 500000 9177 925 34439 28325 7099 9560 21204 48849 36028 23762 6297 46964 38036 31855 6292 1832...
output:
result:
Test #5:
score: 5
Accepted
time: 161ms
memory: 23672kb
input:
50000 500000 30632 1595 20715 35227 44119 45259 47444 36877 6942 14652 2864 18557 42367 19431 38615 ...
output:
1 2 0 0 0 0 0 2 0 0 0 0 0 0 2 2 2 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 2 0 0 0 0 0 0 0 0 ...
result:
ok single line: '1 2 0 0 0 0 0 2 0 0 0 0 0 0 2 ... 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 '
Test #6:
score: 5
Accepted
time: 171ms
memory: 23584kb
input:
50000 500000 33040 23079 35743 21197 49128 38373 36656 46198 17910 29433 45170 24921 28618 34080 100...
output:
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 2 2 0 0 0 0 0 0 0 0 0 2 0 0 0 1 0 0 0 0 0 0 2 ...
result:
ok single line: '1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ... 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 '
Test #7:
score: 5
Accepted
time: 165ms
memory: 23508kb
input:
50000 500000 5226 27470 49597 10290 40326 34407 17000 37084 26244 45989 48273 4706 15981 19231 26219...
output:
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ...
result:
ok single line: '1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 '
Test #8:
score: 5
Accepted
time: 317ms
memory: 29696kb
input:
50000 500000 16952 41617 2923 24354 4446 41320 8355 41065 23930 48553 5990 23289 30279 14635 16174 1...
output:
1 0 2 2 2 2 0 0 0 2 1 0 0 2 0 0 0 0 0 2 2 0 2 0 1 0 0 2 0 1 2 0 2 0 2 0 2 2 0 0 0 2 2 2 2 0 0 0 2 2 ...
result:
ok single line: '1 0 2 2 2 2 0 0 0 2 1 0 0 2 0 ... 0 0 2 2 2 0 0 1 2 1 0 2 0 2 0 '
Test #9:
score: 0
Time Limit Exceeded
input:
50000 500000 40140 17583 24758 1389 12331 1829 43385 23986 38136 28093 21088 33706 44519 38558 39908...
output:
result:
Test #10:
score: 5
Accepted
time: 149ms
memory: 23504kb
input:
50000 500000 26128 23615 14751 3541 9682 26585 39984 12641 32407 34611 40404 13491 49939 11363 19404...
output:
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ...
result:
ok single line: '1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 '
Test #11:
score: 0
Memory Limit Exceeded
input:
100000 500000 1 2 1 3 1 8 1 10 1 11 1 17 1 48 1 100 1 284 1 3021 1 7857 1 16097 1 18352 1 17333 1 81...
output:
result:
Test #12:
score: 0
Memory Limit Exceeded
input:
100000 500000 1 2 1 4 1 5 1 7 1 8 1 13 1 15 1 587 1 6125 1 8728 1 1965 1 12132 1 8992 1 17819 1 1358...
output:
result:
Test #13:
score: 0
Memory Limit Exceeded
input:
100000 500000 1 2 1 6 1 45 1 68 1 79 1 496 1 546 1 1119 1 1510 1 1665 1 3262 1 4727 1 4879 1 5430 1 ...
output:
result:
Test #14:
score: 0
Memory Limit Exceeded
input:
100000 500000 1 2 1 4 1 8 1 16 1 28 1 58 1 85 1 96 1 106 1 241 1 3315 1 3551 1 13 1 1969 1 12587 1 1...
output:
result:
Test #15:
score: 0
Memory Limit Exceeded
input:
100000 500000 1 2 1 7 1 13 1 15 1 18 1 74 1 277 1 652 1 1116 1 8926 1 9947 1 12793 1 17696 1 1742 1 ...
output:
result:
Test #16:
score: 0
Memory Limit Exceeded
input:
100000 500000 1 2 1 4 1 5 1 7 1 8 1 21 1 26 1 29 1 31 1 254 1 385 1 451 1 678 1 1278 1 2323 1 3775 1...
output:
result:
Test #17:
score: 0
Memory Limit Exceeded
input:
100000 500000 1 2 1 15 1 44 1 60 1 183 1 365 1 582 1 1768 1 1793 1 6193 1 9585 1 12293 1 447 1 9529 ...
output:
result:
Test #18:
score: 0
Memory Limit Exceeded
input:
100000 500000 1 2 1 3 1 4 1 65 1 103 1 282 1 3710 1 5403 1 7559 1 4446 1 5382 1 5028 1 18244 1 5690 ...
output:
result:
Test #19:
score: 0
Memory Limit Exceeded
input:
100000 500000 1 2 1 6 1 310 1 510 1 643 1 667 1 4289 1 13736 1 15465 1 7212 1 8416 1 8424 1 11633 1 ...
output:
result:
Test #20:
score: 0
Memory Limit Exceeded
input:
100000 500000 1 2 1 4 1 6 1 7 1 10 1 16 1 247 1 433 1 540 1 2050 1 2671 1 13116 1 9660 1 18620 1 107...