제출 #1129172

#제출 시각아이디문제언어결과실행 시간메모리
1129172MatbubbleDNA 돌연변이 (IOI21_dna)C++20
56 / 100
103 ms15452 KiB
#include "dna.h" #include <iostream> #define dbg(x) cerr<<#x<<": "<<x<<"\n"; using namespace std; const int maxN=1e5; int tree[4*maxN][10]; int curr[10]; int prefA[maxN+10][3], prefB[maxN+10][3]; string A, B; int hashi(char a, char b){ int num=3*(a-'A')+(b-'A'); return num; } void build(int root, int l, int r){ if(l==r){ tree[root][hashi(A[l], B[r])]++; return; } int mid=((l+r)>>1); build(2*root, l, mid); build(2*root+1, mid+1, r); for(int i=0 ; i<9 ; i++) tree[root][i]=tree[2*root][i]+tree[2*root+1][i]; } void querie(int root, int l, int r, int ql, int qr){ if(r<ql || l>qr) return; if(l>=ql && r<=qr){ // dbg(l) // dbg(r) for(int i=0 ; i<9 ; i++) curr[i]+=tree[root][i]; return; } int mid=((l+r)>>1); querie(2*root, l, mid, ql, qr); querie(2*root+1, mid+1, r, ql, qr); } void init(std::string a, std::string b) { for(char &ch:a){ if(ch=='T') ch='B'; } for(char &ch:b){ if(ch=='T') ch='B'; } // return; A=a; B=b; build(1, 0, (int)a.size()-1); for(int i=1 ; i<=(int)a.size() ; i++){ if(i>1){ for(int j=0 ; j<3 ; j++){ prefA[i][j]=prefA[i-1][j]; prefB[i][j]=prefB[i-1][j]; } } int sumA=a[i-1]-'A', sumB=b[i-1]-'A'; prefA[i][sumA]++; prefB[i][sumB]++; } } int get_distance(int x, int y) { // return 0; for(int i=0 ; i<3 ; i++){ if(prefA[y+1][i]-prefA[x][i]!=prefB[y+1][i]-prefB[x][i]) return -1; } for(int i=0 ; i<9 ; i++) curr[i]=0; // dbg(x) // dbg(y) querie(1, 0, (int)A.size()-1, x, y); int ans=0, need=0; // for(int i=0 ; i<9 ; i++) dbg(curr[i]) for(int i=0 ; i<9 ; i++){ int izq=i/3, der=i%3; if(izq==der) continue; int aux=min(curr[i], curr[3*der+izq]); ans+=aux; curr[i]-=aux; curr[3*der+izq]-=aux; need+=curr[i]; } return ans+(need>0?need-1:0); }
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