Submission #2472

#TimeUsernameProblemLanguageResultExecution timeMemory
2472aintaWombats (IOI13_wombats)C++98
100 / 100
7148 ms101884 KiB
#include "wombats.h" #define SZ 256 #define INF 999999999 int D[512][201][201],bucket_sz,h[5010][210],v[5010][210],TP[23][210][210],r,c; void Do(int num,int a) { int i,j,k,bsz=bucket_sz; if(a+bsz>r)bsz=r-a; for(i=0;i<=bsz;i++) for(j=0;j<c;j++) for(k=0;k<c;k++) TP[i][j][k]=INF; for(i=0;i<c;i++)TP[0][i][i]=0; for(i=0;i<bsz;i++) { for(j=0;j<c;j++){ for(k=1;k<c;k++) if(TP[i][j][k]>TP[i][j][k-1]+h[a+i][k-1]) TP[i][j][k]=TP[i][j][k-1]+h[a+i][k-1]; for(k=c-2;k>=0;k--) if(TP[i][j][k]>TP[i][j][k+1]+h[a+i][k]) TP[i][j][k]=TP[i][j][k+1]+h[a+i][k]; } for(j=0;j<c;j++) for(k=0;k<c;k++) TP[i+1][j][k]=TP[i][j][k]+v[a+i][k]; } for(i=0;i<c;i++) for(j=0;j<c;j++) D[num][i][j]=TP[bsz][i][j]; } void Update(int a) { int i,j,k,b,e,w[201],s,l; int c1=a*2,c2=a*2+1; for(i=0;i<c;i++)for(j=0;j<c;j++)D[a][i][j]=INF+1; for(i=0;i<c;i++)w[i]=0; w[0]=c-1; for(i=c-1;i>-c;i--){ b=-i;e=c-1-i; if(b<0)b=0; if(e>=c)e=c-1; for(j=b;j<=e;j++){ if(j==b)s=0; else s=w[j-1]; if(j==e)l=c-1; else l=w[j]; for(k=s;k<=l;k++){ if(D[a][j][j+i]>D[c1][j][k]+D[c2][k][j+i]){ D[a][j][j+i]=D[c1][j][k]+D[c2][k][j+i]; w[j]=k; } } } } } void changeV(int P, int Q, int W) { v[P][Q]=W; int a=P/bucket_sz; Do(SZ+a,a*bucket_sz); a+=SZ; while(a>1){ a>>=1; Update(a); } } void changeH(int P, int Q, int W) { h[P][Q]=W; int a=P/bucket_sz; Do(SZ+a,a*bucket_sz); a+=SZ; while(a>1){ a>>=1; Update(a); } } int escape(int V1, int V2) { return D[1][V1][V2]; } void init(int R, int C, int H[5000][200], int V[5000][200]) { r=R,c=C; int i,j,k; for(i=0;i<R;i++)for(j=0;j<C-1;j++)h[i][j]=H[i][j]; for(i=0;i<R-1;i++)for(j=0;j<C;j++)v[i][j]=V[i][j]; bucket_sz=(R-1)/256+1; for(i=0;i<R;i+=bucket_sz) { Do(SZ+i/bucket_sz,i); } for(i=SZ+i/bucket_sz;i<512;i++){ for(j=0;j<C;j++){ for(k=0;k<C;k++)D[i][j][k]=INF; D[i][j][j]=0; } } for(i=SZ-1;i>=1;i--)Update(i); }
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