Submission #826760

#TimeUsernameProblemLanguageResultExecution timeMemory
826760arnold518Prisoner Challenge (IOI22_prison)C++17
100 / 100
9 ms1584 KiB
#include "prison.h" #include <bits/stdc++.h> using namespace std; typedef long long ll; typedef pair<int, int> pii; typedef pair<ll, ll> pll; int P[]={0, 2, 3, 3, 3, 3, 2, 2, 2}; int Q[]={0, 2, 5, 8, 11, 14, 16, 18, 20}; int A[21][5023]; int B[10][5023]; void f(int pos, int l, int r) { B[pos][l]=-1; B[pos][r]=-2; if(l+2>r) return; int p=(r-l-1)/P[pos]; for(int i=l+1; i<r; i++) { B[pos][i]=(i-l-1)/p+Q[pos-1]+1; } for(int i=l+1; i<r; i+=p) f(pos+1, i, i+p-1); } vector<vector<int>> devise_strategy(int N) { f(1, 1, 5022); A[0][0]=0; A[0][1]=-1; A[0][5022]=-2; for(int i=2; i<=5021; i++) A[0][i]=B[1][i]; for(int i=1; i<=8; i++) { for(int j=Q[i-1]+1; j<=Q[i]; j++) { int t=A[j][0]=i%2; for(int k=1; k<=5022; k++) { if(B[i][k]==-1) { if(t) A[j][k]=-2; else A[j][k]=-1; } else if(B[i][k]==-2) { if(t) A[j][k]=-1; else A[j][k]=-2; } else if(B[i][k]<j) { if(t) A[j][k]=-2; else A[j][k]=-1; } else if(B[i][k]>j) { if(t) A[j][k]=-1; else A[j][k]=-2; } else { if(B[i+1][k]==-1) { if(t) A[j][k]=-2; else A[j][k]=-1; } else if(B[i+1][k]==-2) { if(t) A[j][k]=-1; else A[j][k]=-2; } else A[j][k]=B[i+1][k]; } } } } vector<vector<int>> ans=vector<vector<int>>(21, vector<int>(N+1)); for(int i=0; i<=20; i++) for(int j=0; j<=N; j++) ans[i][j]=A[i][j]; return ans; }
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