/* ` `` ` . ` .g,` Welcome To My Coding Space! .MMe `(F(#~ `.J, `.M/7b. dD.N; (#=#: `` db (m.#` Wl(@ jF ` `` ` ` ` ..+kMMN;_(Y> `(TD d$..gHN_ ` `` ...... ` ` ` `..gMB61+1+dK `- `. .TM@^(d% `` `` ..JggHHMMHHYYTHMMMNmgJ.. .kB6z?1+z1+
+H8+=??=?=?=???=?=?=z1&z1?==?1dMdNcHmJ1+1JMMR1?z??Ne1dM9+?(MF(MI+jMf .`.``.`.. (TNaHr`.`.TNmN:(MR+?zMK(M$` `.`.``dF ` J#<=1;?Wp .``.` J#>dN, ..``.`dF` `_UmMn .`..`..`..`. JMYT1<;;;>>>>>;>>?Wo ..`. dK1=dN,`..``.MN+ .dMMe .`.``.`.`.` d#<;>>>>;>>>>;>>>>(N,`.. -MK1llvWm. JM?Mp. ` ` ` .M9+?Me`.`..`.`.`` JN(>;>>;>>;>>>;>>>>>>>;>>>>>;>>>>>>>>>>>>>>><(W$(M8TIllllllllllllllllzvMo ` ` ` (#1?==1?===z?TNa,.` `` (Ne<<>>>>><;><;jgMMY1HK1lllllllllllllllllllJMp ` .Ne&g&x1=?=?==?1zTHNmJ-...dNgJ++++&ggMH9=~ .M9Izlllllllllllllllllll1WF ` ` _???MK<=??=??1z?(MM@!d#M#Y""""= #define rep(i,a,b) for(int i=a;i struct MaxFlow { struct edge { int to, reve; V cap; edge(int t, int r, V c) : to(t), reve(r), cap(c) {} }; int MV; vector> E; vector itr, lev; MaxFlow() {} MaxFlow(int n) { init(n); } void init(int n) { MV = n; itr = vector(MV), lev = vector(MV); E = vector>(MV); } void add_edge(int x, int y, V cap, bool undir = false) { E[x].push_back(edge(y, (int)E[y].size(), cap)); E[y].push_back(edge(x, (int)E[x].size() - 1, undir ? cap : 0)); } void bfs(int cur) { rep(i, 0, MV) lev[i] = -1; queue q; lev[cur] = 0; q.push(cur); while (q.size()) { int v = q.front(); q.pop(); for(auto e : E[v]) if (e.cap>0 && lev[e.to]<0) lev[e.to] = lev[v] + 1, q.push(e.to); } } V dfs(int from, int to, V cf) { if (from == to) return cf; for (; itr[from]cap>0 && lev[from]to]) { V f = dfs(e->to, to, min(cf, e->cap)); if (f>0) { e->cap -= f; E[e->to][e->reve].cap += f; return f; } } } return 0; } V maxflow(int from, int to) { V fl = 0, tf; while (1) { bfs(from); if (lev[to]<0) return fl; rep(i, 0, MV) itr[i] = 0; while ((tf = dfs(from, to, numeric_limits::max()))>0) fl += tf; } } }; struct BipartiteMatching { int N, M; MaxFlow mf; BipartiteMatching(int n, int m) : N(n), M(m) { mf.init(n + m + 2); } void add_edge(int a, int b) { mf.add_edge(a, N + b, 1); } int match() { rep(a, 0, N) mf.add_edge(N + M, a, 1); rep(b, 0, M) mf.add_edge(N + b, N + M + 1, 1); return mf.maxflow(N + M, N + M + 1); } int whois(int a) { for (auto e : mf.E[a]) if (e.cap == 0) return e.to - N; return -1; } }; //--------------------------------------------------------------------------------------------------- int N, A[50]; //--------------------------------------------------------------------------------------------------- void _main() { cin >> N; rep(i, 0, N) cin >> A[i]; BipartiteMatching bm(N, N); rep(i, 0, N) rep(j, 0, N) if (A[i] != j) bm.add_edge(i, j); if (bm.match() != N) { printf("-1\n"); return; } rep(i, 0, N) printf("%d\n", bm.whois(i)); }