제출 #283133

#제출 시각아이디문제언어결과실행 시간메모리
283133mosiashvililuka건물 4 (JOI20_building4)C++14
100 / 100
343 ms44664 KiB
#include<bits/stdc++.h> using namespace std; int a,b,c,d,e,i,j,ii,jj,zx,xc,dpmn[1000009][2],dpmx[1000009][2],f[1000009],g[1000009],kl[1000009][2]; char pas[1000009]; int main(){ ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0); cin>>a; a*=2; for(i=1; i<=a; i++) cin>>f[i]; for(i=1; i<=a; i++) cin>>g[i]; for(i=0; i<=a; i++){ for(j=0; j<=1; j++){ dpmn[i][j]=a+3; dpmx[i][j]=0; } } dpmn[0][0]=0;dpmx[0][0]=0; dpmn[0][1]=0;dpmx[0][1]=0; for(i=1; i<=a; i++){ kl[i][0]=f[i];kl[i][1]=g[i]; if(f[i]>=f[i-1]){ dpmn[i][0]=min(dpmn[i][0],dpmn[i-1][0]+1); dpmx[i][0]=max(dpmx[i][0],dpmx[i-1][0]+1); } if(f[i]>=g[i-1]){ dpmn[i][0]=min(dpmn[i][0],dpmn[i-1][1]+1); dpmx[i][0]=max(dpmx[i][0],dpmx[i-1][1]+1); } if(g[i]>=f[i-1]){ dpmn[i][1]=min(dpmn[i][1],dpmn[i-1][0]); dpmx[i][1]=max(dpmx[i][1],dpmx[i-1][0]); } if(g[i]>=g[i-1]){ dpmn[i][1]=min(dpmn[i][1],dpmn[i-1][1]); dpmx[i][1]=max(dpmx[i][1],dpmx[i-1][1]); } } j=-1; if(dpmn[a][0]<=a/2&&a/2<=dpmx[a][0]){ j=0; } if(dpmn[a][1]<=a/2&&a/2<=dpmx[a][1]){ j=1; } if(j==-1){ cout<<-1; return 0; } //cout<<j<<endl; zx=a/2; for(i=a; i>=1; i--){ if(j==-1){ cout<<-1; return 0; } xc=-1; if(j==0) jj=1; else jj=0; if(j==0) zx--; if(j==0) pas[i]='A'; else pas[i]='B'; if(kl[i][j]>=kl[i-1][j]&&dpmn[i-1][j]<=zx&&zx<=dpmx[i-1][j]){ xc=j; } if(kl[i][j]>=kl[i-1][jj]&&dpmn[i-1][jj]<=zx&&zx<=dpmx[i-1][jj]){ xc=jj; } j=xc; } for(i=1; i<=a; i++) cout<<pas[i]; return 0; }
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