제출 #722192

#제출 시각아이디문제언어결과실행 시간메모리
722192Yell0DNA 돌연변이 (IOI21_dna)C++17
0 / 100
42 ms9676 KiB
#include <bits/stdc++.h> using namespace std; const int MN=1e5+2; int N,pfa[2][MN],pfc[2][MN],pft[2][MN],pfsw[3][3][MN]; string S[2]; void init(string a,string b) { N=a.size(); S[0]=a,S[1]=b; for(int i=1;i<=N;++i) for(int j=0;j<2;++j) { pfa[j][i]=pfa[j][i-1]+(S[j][i-1]=='A'); pfc[j][i]=pfc[j][i-1]+(S[j][i-1]=='C'); pft[j][i]=pft[j][i-1]+(S[j][i-1]=='T'); } for(int i=1;i<=N;++i) { char xc=S[0][i-1],yc=S[1][i-1]; int x=(xc=='A'?0:(xc=='C'?1:2)),y=(yc=='A'?0:(yc=='C'?1:2)); for(int k=0;k<3;++k) for(int l=0;l<3;++l) pfsw[k][l][i]=pfsw[k][l][i-1]+(k==x&&l==y); } } int get_distance(int x,int y) { ++x,++y; if(pfa[0][y]-pfa[0][x-1]!=pfa[1][y]-pfa[1][x-1]||pfc[0][y]-pfc[0][x-1]!=pfc[1][y]-pfc[1][x-1]||pft[0][y]-pft[0][x-1]!=pft[1][y]-pft[1][x-1]) return -1; int ans=0,sw[3][3],tsw=0; for(int k=0;k<3;++k) for(int l=0;l<3;++l) { sw[k][l]=pfsw[k][l][y]-pfsw[k][l][x-1]; tsw+=sw[k][l]; } for(int k=0;k<3;++k) for(int l=k+1;l<3;++l) { ans+=min(sw[k][l],sw[l][k]); tsw-=min(sw[k][l],sw[l][k])*2; } ans+=tsw*2/3; return ans; }
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