Submission #584594

#TimeUsernameProblemLanguageResultExecution timeMemory
584594MohammadAghilCop and Robber (BOI14_coprobber)C++17
100 / 100
1428 ms15840 KiB
#include <bits/stdc++.h> #include "coprobber.h" using namespace std; typedef long long ll; typedef pair<int, int> pp; #define rep(i,l,r) for(int i = (l); i < (r); i++) #define per(i,r,l) for(int i = (r); i >= (l); i--) #define sz(x) (int)x.size() #define ff first #define ss secounf #define all(x) begin(x), end(x) #define pb push_back const ll mod = 1e9+7, maxn = 5e2+1, inf = ll(1e9)+5; struct state{ int u, v, id; bool nb; state(){} state(int u, int v, int nb): u(u), v(v), nb(nb){ id = (u*maxn + v)<<1|nb; } state(int id): id(id){ nb = id&1, id >>= 1; v = id%maxn, u = id/maxn; } }; int n, cnt[maxn*maxn]; state SS[maxn*maxn*2]; int SID[maxn][maxn][2], SIDd[maxn][maxn]; // vector<int> adjr[maxn*maxn*2]; // bool win[maxn*maxn*2]; bitset<maxn*maxn*2> win; bool B[maxn][maxn]; int nxt[maxn*maxn], out[maxn*maxn]; #define MAX_N 500 vector<int> adjr(state a){ vector<int> res; res.reserve(n+1); if(a.nb){ rep(i,0,n) if(B[i][a.u]) res.pb(SID[i][a.v][0]); res.pb(a.id^1); if(a.v == n) res.pb(SID[n][n][0]); }else{ rep(i,0,n) if(B[i][a.v]) res.pb(SID[a.u][i][1]); res.pb(SID[a.u][n][1]); } return res; } void calc(){ vector<int> winners; rep(i,0,n) rep(t,0,2) winners.pb(SID[i][i][t]), win[winners.back()] = true; int id = 0; while(sz(winners)){ int r = winners.back(); winners.pop_back(); state R = SS[r]; // cout << r << endl; for(int c: adjr(R)){ if(win[c]) continue; id = c, c>>=1; if(id&1){ cnt[c]++; if(cnt[c] == out[c]) { winners.pb(id); win[winners.back()] = true; } }else winners.pb(id), nxt[c] = R.u, win[winners.back()] = true; } } } int u, v; int nextMove(int r){ v = r, u = nxt[SIDd[u][v]]; return u; } int start(int n, bool A[MAX_N][MAX_N]){ ::n = n; rep(i,0,n+1) rep(j,0,n+1) rep(t,0,2) SID[i][j][t] = state(i, j, t).id, SIDd[i][j] = SID[i][j][0]>>1; rep(i,0,maxn*maxn*2) SS[i] = state(i); rep(i,0,n) rep(j,0,n) { if(A[i][j]){ B[i][j] = true; rep(a,0,n) { out[SIDd[a][i]]++; } } } rep(i,0,n) { rep(j,0,n) out[SIDd[i][n]]++; } calc(); if(!win[SID[n][n][0]]) return -1; u = nxt[SIDd[n][n]], v = n; return u; } // don't modify the main function // int main() { // cin.tie(0) -> sync_with_stdio(0); // int N; // cin >> N; // bool A[MAX_N][MAX_N]; // for (int i = 0; i < N; i++) { // for (int j = 0; j < N; j++) { // cin >> A[i][j]; // } // } // int P = start(N,A); // cout << P << endl; // int R; // cin >> R; // while (true) { // if (P == R) break; // P = nextMove(R); // cout << P << endl; // if (P == R) break; // cin >> R; // } // } // int main(){ // cin.tie(0) -> sync_with_stdio(0); // cin >> n; // rep(i,0,n) rep(j,0,n) { // bool k; cin >> k; // if(k){ // rep(a,0,n) { // add_edge(state(a, i, 1), state(a, j, 0)); // add_edge(state(i, a, 0), state(j, a, 1)); // } // } // } // rep(i,0,n) rep(j,0,n) add_edge(state(i, j, 0), state(i, j, 1)); // rep(i,0,n) { // add_edge(state(n, n, 0), state(i, n, 1)); // rep(j,0,n) add_edge(state(i, n, 1), state(i, j, 0)); // } // calc(); // rep(i,0,n) rep(j,0,n) { // int ID = state(i, j, 0).id; // if(!win[ID]) cout << -1 << ' '; // else cout << i << ',' << j << ',' << nxt[ID] << ' '; // if(j == n-1) cout << '\n'; // } // if(!win[state(n, n, 0).id]) return -1; // cr = state(nxt[state(n, n, 0).id], n, 1); // cout << '#' << cr.u << endl; // while(cr.u - cr.v || cr.u == n){ // int a; cin >> a; // cout << '#' << nextMove(a) << endl; // } // return 0; // } /* 4 0 1 0 1 1 0 1 0 0 1 0 1 1 0 1 0 3 0 1 1 1 0 1 1 1 0 */
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