Submission #1023864

#TimeUsernameProblemLanguageResultExecution timeMemory
1023864boyliguanhanWombats (IOI13_wombats)C++17
100 / 100
17355 ms20740 KiB
#include "wombats.h" #pragma GCC optimize(2) #include<bits/stdc++.h> using namespace std; int tmp[200][200],SSZZ; int opt[201][201]; struct matrix{ int V[200][200]; void friend operator *=(matrix &a,matrix &b){ memcpy(tmp,a.V,sizeof tmp); for(int i=0;i<SSZZ;i++) for(int j=0;j<SSZZ;j++) a.V[i][j]=1e9; for(int i=0;i<SSZZ;i++) opt[SSZZ][i]=SSZZ-1; for(int i=SSZZ;i--;) { for(int k=0;k<=opt[i+1][0];k++) if(a.V[i][0]>tmp[i][k]+b.V[k][0]) a.V[i][0]=tmp[i][k]+b.V[k][0],opt[i][0]=k; for(int j=1;j<SSZZ;j++) for(int k=opt[i][j-1];k<=opt[i+1][j];k++) if(a.V[i][j]>tmp[i][k]+b.V[k][j]) a.V[i][j]=tmp[i][k]+b.V[k][j],opt[i][j]=k; } } void reset(){ for(int i=0;i<200;i++) memset(V[i],15,sizeof V[i]),V[i][i]=0; } } mygod[101],finalstuff; int ans[200][200],lr[5000][200],dn[5000][200],col,row,SZ=310,blocknum; void recalcblok(int blok){ mygod[blok].reset(); int end=min(row-1,SZ*blok+SZ); for(int r=SZ*blok+1;r<=end;r++){ for(int i=0;i<col;i++) { for(int j=0;j<col;j++) mygod[blok].V[i][j]+=dn[r-1][j]; for(int j=0;++j<col;) mygod[blok].V[i][j]=min(mygod[blok].V[i][j], mygod[blok].V[i][j-1]+lr[r][j-1]); for(int j=col;--j;) mygod[blok].V[i][j-1]=min(mygod[blok].V[i][j-1], mygod[blok].V[i][j]+lr[r][j-1]); } } } void redofinale(){ int pref[200]; pref[0]=0; for(int i=1;i<200;i++) pref[i]=pref[i-1]+lr[0][i-1]; for(int i=0;i<col;i++) for(int j=0;j<col;j++) finalstuff.V[i][j]=abs(pref[i]-pref[j]); for(int i=0;i<=blocknum;i++) finalstuff*=mygod[i]; } void init(int R, int C, int H[5000][200], int V[5000][200]) { SSZZ=C; for(int i=0;i<5000;i++) memcpy(lr[i],H[i],sizeof lr[i]), memcpy(dn[i],V[i],sizeof dn[i]); row=R;col=C; blocknum=(R-2)/SZ; for(int i=0;i<=blocknum;i++) recalcblok(i); redofinale(); } void changeH(int P, int Q, int W) { lr[P][Q]=W; if(P)recalcblok(P/SZ),redofinale(); } void changeV(int P, int Q, int W) { memset(ans,-1,sizeof ans); dn[P][Q]=W; recalcblok(P/SZ),redofinale(); } int escape(int V1, int V2) { return finalstuff.V[V1][V2]; }

Compilation message (stderr)

grader.c: In function 'int main()':
grader.c:15:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
   15 |  int res;
      |      ^~~
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