codeforces 650C. Table Compression 并查集
首先想到的应该是排个序然后从小到大填, 每一个填的数应该是这一行和这一列已经有的数的最大值+1。
然后就是处理相同的数, 可以用并查集把它们都并起来, 然后他们的值就一样了, 具体的并查集方法看代码。
我的代码参考的http://www.cnblogs.com/qscqesze/p/5253195.html这里
#include <iostream> #include <vector> #include <cstdio> #include <cstring> #include <algorithm> #include <cmath> #include <map> #include <set> #include <string> #include <queue> #include <stack> #include <bitset> using namespace std; #define pb(x) push_back(x) #define ll long long #define mk(x, y) make_pair(x, y) #define lson l, m, rt<<1 #define mem(a) memset(a, 0, sizeof(a)) #define rson m+1, r, rt<<1|1 #define mem1(a) memset(a, -1, sizeof(a)) #define mem2(a) memset(a, 0x3f, sizeof(a)) #define rep(i, n, a) for(int i = a; i<n; i++) #define fi first #define se second typedef pair<int, int> pll; const double PI = acos(-1.0); const double eps = 1e-8; const int mod = 1e9+7; const int inf = 1061109567; const int dir[][2] = { {-1, 0}, {1, 0}, {0, -1}, {0, 1} }; const int maxn = 1e6+5; pair <int, pll> q[maxn]; int ans[maxn], X[maxn], Y[maxn], ansx[maxn], ansy[maxn], f[maxn]; int findd(int u) { return u == f[u]?u:f[u] = findd(f[u]); } void unionn(int u, int v) { u = findd(u), v = findd(v); if(u != v) f[u] = v; } int main() { int n, m; cin>>n>>m; for(int i = 0; i<n*m; i++) { scanf("%d", &q[i].fi); f[i] = i; q[i].se.fi = i/m; q[i].se.se = i%m; } sort(q, q+n*m); int j = -1, x, y, pos; for(int i = 0; i<n*m; i++) { if(i != n*m-1 && q[i].fi == q[i+1].fi) continue; for(int k = j+1; k<=i; k++) { x = q[k].se.fi, y = q[k].se.se; pos = x*m+y; X[x] = pos, Y[y] = pos; } for(int k = j+1; k<=i; k++) { x = q[k].se.fi, y = q[k].se.se; pos = x*m+y; unionn(X[x], pos); unionn(Y[y], pos); } for(int k = j+1; k<=i; k++) { x = q[k].se.fi, y = q[k].se.se; pos = x*m+y; pos = findd(pos); ans[pos] = max(ans[pos], max(ansx[x], ansy[y])+1); } for(int k = j+1; k<=i; k++) { x = q[k].se.fi, y = q[k].se.se; pos = x*m+y; pos = findd(pos); ansx[x] = max(ansx[x], ans[pos]); ansy[y] = max(ansy[y], ans[pos]); } j = i; } for(int i = 0; i<n; i++) { for(int j = 0; j<m; j++) { printf("%d ", ans[findd(i*m+j)]); } cout<<endl; } return 0; }