結果
| 問題 |
No.2293 無向辺 2-SAT
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2023-05-05 22:36:11 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 174 ms / 4,000 ms |
| コード長 | 1,631 bytes |
| コンパイル時間 | 1,714 ms |
| コンパイル使用メモリ | 171,060 KB |
| 実行使用メモリ | 73,716 KB |
| 最終ジャッジ日時 | 2024-11-23 09:43:16 |
| 合計ジャッジ時間 | 12,225 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 53 |
ソースコード
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll mod = 998244353;
ll t = 1,n,m,k,q,l,r,a,b,c,u,v,x,y,z,sz,cnt,o,fl,pw[400009],id[400009];
string s;
struct st{ll x,y; /*bool operator < (const st &a) const{return x < a.x;};*/};
vector <st> del;
bool cmp(const st &a,const st &b){return a.x < b.x;}
inline ll read(){
ll s = 0,w = 1;
char ch = getchar();
while (ch > '9' || ch < '0'){ if (ch == '-') w = -1; ch = getchar();}
while (ch <= '9' && ch >= '0') s = (s << 1) + (s << 3) + (ch ^ 48),ch = getchar();
return s * w;
}
ll qp(ll x,ll y){
ll a = 1,b = x;
while (y){
if (y & 1) a = a * b % mod;
b = b * b % mod,y >>= 1;
}
return a;
}
ll find(ll x){
if (x == id[x]) return x;
ll qwq = find(id[x]);
del.emplace_back((st){x,id[x]}),id[x] = qwq;
return qwq;
}
void merge(ll x,ll y){
ll qwq = find(x),awa = find(y);
if (qwq == awa) return;
sz -= 1;
del.emplace_back((st){qwq,id[qwq]}),id[qwq] = awa;
if (x > n) x -= n;
if (y > n) y -= n;
if (find(x) == find(x + n)) fl = 1;
if (find(y) == find(y + n)) fl = 1;
}
void clear(){
while (del.size()) id[del.back().x] = del.back().y,del.pop_back();
sz = 2 * n,fl = 0;
}
int main(){//t = read();
while (t --){
pw[0] = 1;
n = read(),q = read(),sz = 2 * n;
for (ll i = 1;i <= n;i += 1) pw[i] = (pw[i - 1] << 1) % mod;
for (ll i = 1;i <= 2 * n;i += 1) id[i] = i;
for (ll i = 1;i <= q;i += 1){
o = read();
if (o == 1) x = read(),y = read(),merge(x,y),merge(x + n,y + n);
if (o == 2) x = read(),y = read(),merge(x,y + n),merge(x + n,y);
if (o == 3) clear();
if (fl) puts("0");
else printf("%lld\n",pw[sz >> 1]);
}
}
return 0;
}