Submission #622277

#TimeUsernameProblemLanguageResultExecution timeMemory
622277alirezasamimi100Mutating DNA (IOI21_dna)C++17
100 / 100
47 ms7400 KiB
#include "dna.h" using namespace std; const int N = 1e5 + 10; int ps[3][3][N],n; void init(string a, string b) { n=a.size(); for(int i=0; i<n; i++){ if(i){ for(int j=0; j<3; j++){ for(int k=0; k<3; k++){ ps[j][k][i]=ps[j][k][i-1]; } } } int x=2,y=2; if(a[i]=='A') x=0; if(a[i]=='C') x=1; if(b[i]=='A') y=0; if(b[i]=='C') y=1; ps[x][y][i]++; } } int get_distance(int x, int y) { int tp[3][3],ans=0,k; for(int i=0; i<3; i++){ for(int j=0; j<3; j++){ tp[i][j]=ps[i][j][y]; if(x) tp[i][j]-=ps[i][j][x-1]; } } if(tp[0][1]+tp[0][2]!=tp[1][0]+tp[2][0] || tp[1][0]+tp[1][2]!=tp[0][1]+tp[2][1] || tp[2][1]+tp[2][0]!=tp[1][2]+tp[0][2]) return -1; k=min(tp[0][1],tp[1][0]); tp[0][1]-=k; tp[1][0]-=k; ans+=k; k=min(tp[0][2],tp[2][0]); tp[0][2]-=k; tp[2][0]-=k; ans+=k; k=min(tp[2][1],tp[1][2]); tp[2][1]-=k; tp[1][2]-=k; ans+=k; return ans+(tp[0][1]+tp[1][0])*2; }
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