Submission #3799

#TimeUsernameProblemLanguageResultExecution timeMemory
3799mjy0503Make superpalindrome! (kriii1_M)C++98
0 / 1
20 ms5012 KiB
#include <stdio.h> #include <algorithm> #include <string.h> #include <vector> int n,pa[100001],height[100001]; char mun[100001],maxc[100001]; bool check[100001]; using namespace std; vector<int> list[100001]; int parent(int a){ if(pa[a]==-1) return a; return parent(pa[a]); } void back(int s,int e){ if(s+1==e) return ; if((e-s)%2==0){ back(s,(s+e)/2); back((s+e)/2,e); } else{ back(s,(s+e)/2); back((s+e)/2+1,e); } e--; int pa1,pa2; while(s<=e){ pa1=parent(s); pa2=parent(e); if(pa1!=pa2){ if(height[pa1]==height[pa2]) height[pa1]++; if(height[pa1]>height[pa2]){ pa[pa2]=pa1; if(maxc[pa2]>maxc[pa1]) maxc[pa1]=maxc[pa2]; } else{ pa[pa1]=pa2; if(maxc[pa1]>maxc[pa2]) maxc[pa2]=maxc[pa1]; } } s++; e--; } } int main(){ scanf("%s",mun); int i,j; n=strlen(mun); for(i=0;i<n;i++){ pa[i]=-1; maxc[i]=mun[i]; } back(0,n); int par; for(i=0;i<n;i++){ par=parent(i); list[par].push_back(i); } for(i=0;i<n;i++){ par=parent(i); if(check[par]) continue; check[par]=1; if(mun[i]==maxc[par]){ for(j=0;j<list[par].size();j++) mun[list[par][j]]=maxc[par]; } else{ maxc[par]=mun[i]+1; for(j=0;j<list[par].size();j++) mun[list[par][j]]=maxc[par]; for(j=i;j<n;j++){ par=parent(j); if(check[par]) continue; mun[j]='a'; } break; } } printf("%s\n",mun); return 0; }
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