結果
| 問題 |
No.3104 Simple Graph Problem
|
| コンテスト | |
| ユーザー |
hint908
|
| 提出日時 | 2025-04-11 22:35:19 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 108 ms / 2,000 ms |
| コード長 | 3,643 bytes |
| コンパイル時間 | 4,010 ms |
| コンパイル使用メモリ | 288,760 KB |
| 実行使用メモリ | 19,840 KB |
| 最終ジャッジ日時 | 2025-04-11 22:35:31 |
| 合計ジャッジ時間 | 11,440 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 65 |
ソースコード
// #pragma GCC target("avx2")
// #pragma GCC optimize("O3")
// #pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>
using namespace std;
using uint = unsigned int;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
template<class T> using V = vector<T>;
template<class T> using VV = V<V<T>>;
template<class T> using VVV = V<VV<T>>;
template<class T> using VVVV = VV<VV<T>>;
#define rep(i,n) for(ll i=0ll;(i)<(n);(i)++)
#define REP(i,a,n) for(ll i=(a);(i)<(n);(i)++)
#define rrep(i,n) for(ll i=(n)-1;(i)>=(0ll);(i)--)
#define RREP(i,a,n) for(ll i=(n)-1;(i)>=(a);(i)--)
const long long INF = (1LL << 60);
const long long mod99 = 998244353;
const long long mod107 = 1000000007;
const long long mod = mod99;
#define eb emplace_back
#define be(v) (v).begin(),(v).end()
#define all(v) (v).begin(),(v).end()
#define foa(i,v) for(auto& (i) : (v))
#define UQ(v) sort(be(v)), (v).erase(unique(be(v)), (v).end())
#define UQ2(v,cmp) sort(be(v)), (v).erase(unique(be(v),cmp), (v).end())
#define UQ3(v,cmp) sort(be(v),cmp), (v).erase(unique(be(v)), (v).end())
#define UQ4(v,cmp,cmp2) sort(be(v), cmp), (v).erase(unique(be(v),cmp2), (v).end())
#define LB(x,v) (lower_bound(be(v),(x))-(v).begin())
#define LB2(x,v,cmp) (lower_bound(be(v),(x),(cmp))-(v).begin())
#define UB(x,v) (upper_bound(be(v),(x))-(v).begin())
#define UB2(x,v,cmp) (upper_bound(be(v),(x),(cmp))-(v).begin())
#define dout() cout << fixed << setprecision(20)
#define randinit() srand((unsigned)time(NULL))
template<class T, class U> bool chmin(T& t, const U& u) { if (t > u){ t = u; return 1;} return 0; }
template<class T, class U> bool chmax(T& t, const U& u) { if (t < u){ t = u; return 1;} return 0; }
ll Rnd(ll L=0, ll R=mod99){return rand()%(R-L)+L;}
void solve(){
ll n,m;
cin >> n >> m;
V<ll> a(n);
rep(i,n) cin >> a[i];
V<ll> x(m), y(m);
VV<pair<ll,ll>> G(n);
rep(i,m){
cin >> x[i] >> y[i];
x[i]--;
y[i]--;
G[x[i]].eb(y[i], i);
G[y[i]].eb(x[i], i);
}
V<ll> ans(m, 0);
V<ll> used(n, 0);
V<ll> depth(n, 0);
auto dfs = [&](auto&&dfs, ll nd, ll par, ll flag) -> void {
used[nd] = 1;
for(auto [nx, id]:G[nd]) if(!used[nx]){
depth[nx] = depth[nd] + 1;
dfs(dfs, nx, nd, flag);
if(flag){
ans[id] = a[nx];
(a[nx] += mod-ans[id])%=mod;
(a[nd] += mod-ans[id])%=mod;
}
}
};
dfs(dfs, 0, -1, 0);
ll odd = 0, even = 0;
rep(i, n){
if(depth[i]%2) odd += a[i];
else even += a[i];
}
ll f = 0;
rep(i, m) if((depth[x[i]]+depth[y[i]])%2 == 0) f = 1;
if((!f and odd%mod != even%mod)){
cout << -1 << endl;
return;
}
if(f){
rep(i, m) if((depth[x[i]]+depth[y[i]])%2 == 0){
if(depth[x[i]]%2){
ll b = (odd-even)%mod;
(b += mod)%=mod;
if(b%2) b+=mod;
b /= 2;
ans[i] = b;
(a[x[i]] += mod-b)%=mod;
(a[y[i]] += mod-b)%=mod;
}else{
ll b = (even-odd)%mod;
(b += mod) %= mod;
if(b%2) b+=mod;
b /= 2;
ans[i] = b;
(a[x[i]] += mod-b)%=mod;
(a[y[i]] += mod-b)%=mod;
}
break;
}
}
used.assign(n, 0);
dfs(dfs, 0, -1, 1);
rep(i, m) cout << ans[i] << " \n"[i==m-1];
}
int main(){
cin.tie(nullptr);
ios::sync_with_stdio(false);
int t=1;
// cin >> t;
rep(i,t) solve();
}
hint908