結果
問題 |
No.307 最近色塗る問題多くない?
|
ユーザー |
![]() |
提出日時 | 2020-08-25 22:33:51 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
RE
|
実行時間 | - |
コード長 | 3,550 bytes |
コンパイル時間 | 4,290 ms |
コンパイル使用メモリ | 252,852 KB |
最終ジャッジ日時 | 2025-01-13 14:51:07 |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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ファイルパターン | 結果 |
---|---|
other | AC * 13 WA * 1 RE * 21 TLE * 1 |
ソースコード
#pragma GCC optimize("Ofast") #include <bits/stdc++.h> #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> using namespace std; using namespace __gnu_pbds; using ll = long long; using ull = unsigned long long; using pii = pair<int, int>; using pll = pair<long long, long long>; #define rep(i, n) for(int i = 0; i < (n); ++i) #define all(x) (x).begin(),(x).end() constexpr char ln = '\n'; //constexpr long long MOD = 1000000007; constexpr long long MOD = 998244353; template<class T1, class T2> inline bool chmax(T1 &a, T2 b) { if (a < b) { a = b; return true;} return false; } template<class T1, class T2> inline bool chmin(T1 &a, T2 b) { if (a > b) { a = b; return true;} return false; } inline int popcount(int x) {return __builtin_popcount(x);} inline int popcount(long long x) {return __builtin_popcountll(x);} void print() { cout << "\n"; } template<class T, class... Args> void print(const T &x, const Args &... args) { cout << x << " "; print(args...); } /////////////////////////////////////////////////////////////////////////////////////////////////////////////// struct UnionFind { int N; vector<int> node; UnionFind(){} UnionFind(int N) : N(N), node(N,-1) {} void init(int x) { node.assign(x,-1); N = x; } bool merge(int x, int y) { x = root(x); y = root(y); if (x == y) return false; if (node[x] > node[y]) swap(x,y); node[x] += node[y]; node[y] = x; N--; return true; } bool same(int x, int y) {return root(x) == root(y);} int root(int x) { if (node[x] < 0) return x; return node[x] = root(node[x]); } int size(int x) {return -node[root(x)];} int count() const {return N;} }; const int dx[4] = {-1,0,1,0}; const int dy[4] = {0,-1,0,1}; int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int H,W; cin >> H >> W; vector<vector<int>> A(H, vector<int>(W)); rep(i,H) rep(j,W) cin >> A[i][j]; UnionFind uf(H*W); vector<set<pii>> neighbor(H*W+1); vector<int> color(H*W); auto mer=[&](int r1, int r2) { if (uf.root(r1)!=r1) swap(r1,r2); if (neighbor[r1].size() < neighbor[r2].size()) swap(neighbor[r1],neighbor[r2]); neighbor[r1].merge(neighbor[r2]); }; rep(i,H) rep(j,W) { color[i*W+j] = A[i][j]; rep(k,4) { int nx = i + dx[k]; int ny = j + dy[k]; if (nx < 0 or nx >= H or ny < 0 or ny >= W) continue; if (A[i][j]==A[nx][ny]) { int r1 = uf.root(i*W+j); int r2 = uf.root(nx*W+ny); if (uf.merge(r1,r2)) mer(r1,r2); } else { neighbor[uf.root(i*W+j)].emplace(nx,ny); } } } int Q; cin >> Q; while (Q--) { int r, c, X; cin >> r >> c >> X; --r; --c; if (color[uf.root(r*W+c)]==X) continue; color[uf.root(r*W+c)] = X; set<pii> dic; for (auto [x,y] : neighbor[uf.root(r*W+c)]) { if (dic.size() < neighbor[x*W+y].size()) swap(dic,neighbor[x*W+y]); dic.merge(neighbor[x*W+y]); } int k = uf.root(r*W+c); for (auto [x,y] : neighbor[k]) { uf.merge(r*W+c,x*W+y); } if (neighbor[uf.root(r*W+c)].size() < dic.size()) swap(neighbor[uf.root(r*W+c)],dic); neighbor[uf.root(r*W+c)].merge(dic); } rep(i,H) { rep(j,W) cout << color[uf.root(i*W+j)] << " "; cout << ln; } }