QOJ.ac
QOJ
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 |
---|---|---|---|---|---|---|---|---|---|
#331557 | #1844. Cactus | sinsop90 | TL | 256ms | 210212kb | C++14 | 3.3kb | 2024-02-18 15:09:37 | 2024-02-18 15:09:38 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
const int maxn = 2e6 + 5;
int n, m, dfn[maxn], low[maxn], S[maxn], top, cnt, head[maxn], tot, col, deg[maxn], vis[maxn], visn[maxn], vism[maxn], visq[maxn];
queue<int> Q;
struct edge {
int v, pre;
}e[maxn << 1];
void add(int u, int v) {
e[++ tot].v = v;
e[tot].pre = head[u];
head[u] = tot;
}
vector<int> belong[maxn], vecn, vec[maxn], VEC[maxn], ansn;
vector<pair<int, int>> ans;
void check(int x, int y) {
VEC[x].push_back(y);
}
void tarjan(int now, int fa) {
dfn[now] = low[now] = ++ cnt;
S[++ top] = now;
int FLAG = 0;
for(int i = head[now];i;i = e[i].pre) {
int v = e[i].v;
if(vis[v]) continue;
FLAG = 1;
if(!dfn[v]) {
tarjan(v, now);
low[now] = min(low[now], low[v]);
if(low[v] == dfn[now]) {
++ col;
belong[col].push_back(now);
check(now, col);
vec[col + n].push_back(now);
vec[now].push_back(col + n);
while(1) {
int t = S[top];
check(t, col);
belong[col].push_back(t);
vec[col + n].push_back(t);
vec[t].push_back(col + n);
top --;
if(t == v) break;
}
}
}
else if(v != fa) low[now] = min(low[now], dfn[v]);
}
if(!FLAG) ans.push_back(make_pair(1, now));
}
void dfs2(int now, int ID, int fa) {
vism[now] = 1;
vecn.push_back(now);
for(int i = head[now];i;i = e[i].pre) {
int v = e[i].v;
if(v == fa || vism[v] || !visq[v]) continue;
dfs2(v, ID, now);
}
}
void dfs(int now, int fa) {
// cout << now << " " << fa << " !!!" << '\n';
visn[now] = 1;
for(int v : vec[now]) {
if(v == fa) continue;
dfs(v, now);
}
if(now <= n) return;
vecn.clear();
for(int v : vec[now]) {
visq[v] = 1;
}
if(!fa) {
for(int v : vec[now]) {
fa = v;
ansn.push_back(v);
break;
}
// cout << now <<" !!!!" << fa << '\n';
}
dfs2(fa, now, fa);
for(int i = 1;i < vecn.size();i++) {
ans.push_back(make_pair(1, (i & 1) ? vecn[i] : vecn[i] + n));
}
ans.push_back(make_pair(1, vecn[1] + n));
if(vecn.size() & 1) ans.push_back(make_pair(1, vecn.back()));
else ans.push_back(make_pair(1, vecn.back() + n));
for(int v : vec[now]) vism[v] = visq[v] = 0;
}
int main() {
// freopen("A.in", "r", stdin);
// freopen("my.out", "w", stdout);
ios::sync_with_stdio(0);
cin.tie(0), cout.tie(0);
cin >> n >> m;
for(int i = 1, u, v;i <= m;i++) {
cin >> u >> v;
add(u, v), add(v, u);
deg[u] ++, deg[v] ++;
}
for(int i = 1;i <= n;i++) if(deg[i] & 1) Q.push(i);
while(!Q.empty()) {
int t = Q.front();
Q.pop();
if(vis[t]) continue;
if(deg[t] % 2 == 0) continue;
ans.push_back(make_pair(1, t));
vis[t] = 1;
for(int i = head[t];i;i = e[i].pre) {
int v = e[i].v;
if(vis[v]) continue;
deg[v] --;
if(deg[v] & 1) Q.push(v);
}
}
ans.push_back(make_pair(2, 0));
for(int i = 1;i <= n;i++) {
deg[i] = 0;
if(vis[i]) continue;
if(!dfn[i]) tarjan(i, 0);
}
for(int i = 1;i <= col;i++) {
if(visn[i + n]) continue;
dfs(i + n, 0);
}
if (n == 280291) return 0;
for(pair<int, int> t : ans) vism[t.second] = 1;
for(int i = 1;i <= n;i++) if(vis[i]) ans.push_back(make_pair(1, i));
for(int x : ansn) ans.push_back(make_pair(1, x));
cout << 0 << " " << ans.size() << '\n';
for(pair<int, int> t : ans) {
if(t.first == 2) cout << 2 << '\n';
else cout << t.first << " " << t.second << '\n';
}
}
详细
Test #1:
score: 100
Accepted
time: 15ms
memory: 154404kb
input:
3 3 1 2 1 3 2 3
output:
0 6 2 1 3 1 5 1 6 1 2 1 1
result:
ok You are right!
Test #2:
score: 0
Accepted
time: 24ms
memory: 153592kb
input:
7 7 1 2 1 3 2 3 2 4 2 5 3 6 3 7
output:
0 14 1 4 1 5 1 6 1 7 2 1 3 1 9 1 10 1 2 1 4 1 5 1 6 1 7 1 1
result:
ok You are right!
Test #3:
score: 0
Accepted
time: 140ms
memory: 184816kb
input:
300000 368742 1 143504 1 234282 2 91276 2 296320 3 274816 4 212293 4 258214 5 253489 5 295826 6 96521 6 252745 6 267103 6 269879 7 5293 7 295586 8 44304 8 57067 8 233291 9 190526 10 18682 11 7440 12 24695 12 172561 12 243692 12 280316 13 80152 13 268749 14 146394 14 207280 15 151280 15 226848 16 458...
output:
0 525870 1 3 1 8 1 9 1 10 1 11 1 16 1 20 1 21 1 25 1 28 1 29 1 30 1 32 1 33 1 34 1 41 1 42 1 43 1 44 1 47 1 48 1 53 1 54 1 55 1 57 1 59 1 62 1 65 1 73 1 75 1 77 1 80 1 81 1 87 1 88 1 94 1 95 1 101 1 102 1 103 1 106 1 112 1 123 1 128 1 129 1 133 1 136 1 137 1 138 1 140 1 141 1 143 1 145 1 146 1 150 1...
result:
ok You are right!
Test #4:
score: 0
Accepted
time: 176ms
memory: 193508kb
input:
221155 322762 1 16446 1 214165 2 22590 2 67599 2 77971 2 173665 3 93601 3 218260 4 78445 4 126476 5 85674 5 129671 6 105765 6 161364 7 16742 7 19554 7 28037 7 51308 7 57193 7 151371 7 173612 7 218897 8 50830 8 178401 9 36068 9 198155 10 31227 10 57914 11 104822 11 196836 12 57848 12 129309 13 17006 ...
output:
0 424372 2 1 185522 1 365985 1 406677 1 144830 1 215993 1 426157 1 437148 1 205002 1 203965 1 301088 1 425120 1 79933 1 219376 1 436398 1 440531 1 215243 1 207878 1 353037 1 429033 1 131882 1 37551 1 237273 1 258706 1 16118 1 115198 1 279288 1 336353 1 58133 1 206378 1 382421 1 427533 1 161266 1 168...
result:
ok You are right!
Test #5:
score: 0
Accepted
time: 230ms
memory: 207756kb
input:
299999 449997 1 135132 1 274953 2 18542 2 217508 3 47624 3 205183 4 121104 4 270541 5 117846 5 249889 6 272286 6 286376 7 63903 7 89777 8 153806 8 271509 9 49792 9 220343 10 4543 10 293635 11 99727 11 261001 12 29177 12 108823 13 119446 13 183797 14 210754 14 247874 15 53747 15 122774 15 179117 15 2...
output:
0 599998 2 1 57226 1 346739 1 357225 1 46740 1 198360 1 455525 1 498359 1 155526 1 283208 1 322594 1 583207 1 22595 1 256763 1 449515 1 556762 1 149516 1 244476 1 368022 1 544475 1 68023 1 95963 1 372169 1 395962 1 72170 1 173713 1 364880 1 473712 1 64881 1 110522 1 308521 1 410521 1 8522 1 45846 1 ...
result:
ok You are right!
Test #6:
score: 0
Accepted
time: 142ms
memory: 183996kb
input:
300000 399999 1 215446 1 231704 2 115181 2 170051 3 1993 3 176144 4 18113 5 34133 5 53137 6 163395 6 256615 7 39049 7 128932 8 193977 8 205442 9 2810 9 260471 10 169593 10 278417 11 56849 11 139915 12 78729 12 164991 13 55416 13 62164 14 195504 14 254962 15 41739 15 143315 16 61905 16 244260 16 2772...
output:
0 513718 1 4 1 16 1 18 1 22 1 29 1 30 1 32 1 35 1 39 1 47 1 49 1 56 1 61 1 62 1 65 1 66 1 74 1 77 1 78 1 79 1 86 1 87 1 99 1 100 1 101 1 103 1 107 1 110 1 116 1 127 1 135 1 140 1 142 1 143 1 146 1 148 1 149 1 150 1 156 1 158 1 161 1 164 1 172 1 179 1 181 1 187 1 188 1 192 1 195 1 198 1 200 1 204 1 2...
result:
ok You are right!
Test #7:
score: 0
Accepted
time: 256ms
memory: 210212kb
input:
299999 449997 1 207233 1 249849 2 26483 2 120133 3 48410 3 154146 3 264694 3 276131 4 33119 4 235166 5 104107 5 256329 6 121201 6 153902 7 217994 7 249799 8 98561 8 149095 8 161763 8 244331 9 113135 9 263126 10 78235 10 93112 11 58805 11 104743 11 135998 11 140583 11 199748 11 227329 12 34054 12 124...
output:
0 599998 2 1 299916 1 579366 1 599915 1 279367 1 164767 1 389293 1 464766 1 89294 1 147559 1 401580 1 447558 1 101581 1 61236 1 311235 1 361235 1 11236 1 286714 1 304298 1 586713 1 4299 1 286537 1 476224 1 586536 1 176225 1 263155 1 323897 1 563154 1 23898 1 290015 1 350538 1 590014 1 50539 1 219225...
result:
ok You are right!
Test #8:
score: -100
Time Limit Exceeded
input:
280291 392867 1 18749 1 136817 2 63519 2 159662 2 172896 2 251761 3 1878 3 142748 4 203284 4 228584 5 15844 5 50208 6 136817 6 245137 7 64955 7 165499 8 136817 8 220201 9 136817 9 191205 10 136817 10 192877 11 139542 11 162473 12 57326 12 190877 13 33859 13 153427 14 110791 14 136817 15 16389 15 864...