Submission #443306

#TimeUsernameProblemLanguageResultExecution timeMemory
443306azberjibiouMutating DNA (IOI21_dna)C++17
100 / 100
93 ms10376 KiB
#include <bits/stdc++.h> using namespace std; #include "dna.h" const int mxN=100010; int N; int A[mxN][2], B[mxN][6]; int S[mxN][3][2]; int T[mxN][6]; void init(std::string a, std::string b) { N=a.size(); for(int i=0;i<N;i++) { if(a[i]=='A') A[i+1][0]=0; if(a[i]=='T') A[i+1][0]=1; if(a[i]=='C') A[i+1][0]=2; if(b[i]=='A') A[i+1][1]=0; if(b[i]=='T') A[i+1][1]=1; if(b[i]=='C') A[i+1][1]=2; } for(int i=1;i<=N;i++) { int idx=0; for(int j=0;j<3;j++) { for(int k=0;k<3;k++) { if(j==k) continue; if(A[i][0]==j && A[i][1]==k) B[i][idx]++; idx++; } } } for(int i=1;i<=N;i++) { for(int j=0;j<3;j++) { S[i][j][0]=S[i-1][j][0]+(A[i][0]==j ? 1 : 0); S[i][j][1]=S[i-1][j][1]+(A[i][1]==j ? 1 : 0); } for(int j=0;j<6;j++) { T[i][j]=T[i-1][j]+B[i][j]; } } } int get_distance(int x, int y) { x++; y++; for(int i=0;i<3;i++) { if(S[y][i][0]-S[x-1][i][0]!=S[y][i][1]-S[x-1][i][1]) return -1; } int ans=0; int arr[6], tmp; for(int i=0;i<6;i++) arr[i]=T[y][i]-T[x-1][i]; ans+=min(arr[0], arr[2]); ans+=min(arr[1], arr[4]); ans+=min(arr[3], arr[5]); tmp=min(arr[0], arr[2]); arr[0]-=tmp; arr[2]-=tmp; tmp=min(arr[1], arr[4]); arr[1]-=tmp; arr[4]-=tmp; tmp=min(arr[3], arr[5]); arr[3]-=tmp; arr[5]-=tmp; if(arr[0]!=0) ans+=2*arr[0]; else ans+=2*arr[2]; return ans; }
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