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March 21, 2021 16:02
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1484_2c.cpp
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#define FOR(i, begin, end) for(int i=(begin),i##_end_=(end);i<i##_end_;i++) | |
#define REP(i, n) FOR(i,0,n) | |
using namespace std; | |
using namespace atcoder; | |
const int numNode = 2*100000; | |
const int numColor = 4 * 100000; | |
const int numGraph = numNode + numColor + 100; | |
const int snode = numGraph - 3; | |
const int tnode = numGraph - 2; | |
#define ceil(a,b) ((a) + ((b) - 1)) / (b) | |
int solve(){ | |
int n, m; | |
cin >> n>>m; | |
mf_graph<int> mf(1 + n + m + 1); // n+m + s,tのノードを作る | |
int x, y; | |
// スタートノードから人に対して割り当てていい最大数を春 | |
REP(i, n) mf.add_edge(0, i+1, ceil(m, 2)); | |
REP(i, m){ | |
// 日からゴールにcap1だけをはる | |
mf.add_edge(n+i+1, n+m+1, 1); | |
cin >> x; | |
REP(j, x){ // その日に対して | |
cin >> y; // アサインできる人は | |
mf.add_edge(y , i+1+n, 1); // 1を張ってもよい | |
} | |
} | |
auto maf = mf.flow(0, n+m+1); | |
// tに m 流れない場合、これは見たせない | |
if(maf != m){ cout << "NO" << "\n"; return 0; } | |
cout << "YES" << "\n"; | |
vector<mf_graph<int>::edge> edges = mf.edges(); | |
vector<int> res; | |
for (auto &e : edges) { // 全部の辺を見て | |
if(e.from == 0) continue; // sからは無視 | |
if(e.to == n+m+1) continue; // t へも無視 | |
if(e.flow == 1) res.emplace_back(e.from); // 制約的に日->tはcap1なのでこれでよい | |
// 本来は、e.to に対するfromを知りたいのでそう書いた方がよいかも | |
} | |
REP(i, m-1) cout << res[i] << " "; | |
cout << res[m-1] << "\n"; | |
return 0; | |
} | |
int main(int argc, char *argv[]) { | |
int q; | |
cin >> q; | |
REP(i, q) { | |
//cout << i << "--"<<"\n"; | |
solve(); | |
} | |
} |
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