Submission #1018329

#	Time	Username	Problem	Language	Result	Execution time	Memory
1018329		andrewp	Mutating DNA (IOI21_dna)	C++17	100 / 100	41 ms	8636 KiB

dna

#include "dna.h"
#include "bits/stdc++.h"

using namespace std;
int ps[(int)(1e5+1)][3][2], pr[(int)(1e5+1)][6];

void init(std::string a, std::string b) {
    int n=a.size();
    a='i'+a, b='i'+b;
    for(int i=1; i<=n; ++i) {
        ps[i][0][0]=ps[i-1][0][0];
        ps[i][1][0]=ps[i-1][1][0];
        ps[i][2][0]=ps[i-1][2][0];
        ps[i][0][1]=ps[i-1][0][1];
        ps[i][1][1]=ps[i-1][1][1];
        ps[i][2][1]=ps[i-1][2][1];
        if(a[i]=='A') ++ps[i][0][0];
        else if(a[i]=='C') ++ps[i][1][0];
        else ++ps[i][2][0];
        if(b[i]=='A') ++ps[i][0][1];
        else if(b[i]=='C') ++ps[i][1][1];
        else ++ps[i][2][1];
        for(int j=0; j<6; ++j) pr[i][j]=pr[i-1][j];
        if(a[i]=='A'&&b[i]=='C') ++pr[i][0];
        if(a[i]=='C'&&b[i]=='A') ++pr[i][1]; //1
        if(a[i]=='A'&&b[i]=='T') ++pr[i][2]; //1
        if(a[i]=='T'&&b[i]=='A') ++pr[i][3];
        if(a[i]=='C'&&b[i]=='T') ++pr[i][4];
        if(a[i]=='T'&&b[i]=='C') ++pr[i][5]; //1
    }
}

int get_distance(int x, int y) {
    ++x, ++y;
    for(int i=0; i<3; ++i) {
        if((ps[y][i][0]-ps[x-1][i][0])!=(ps[y][i][1]-ps[x-1][i][1])) {
            return -1;
        }
    }
    vector<int> v;
    for(int i=0; i<6; ++i) v.push_back(pr[y][i]-pr[x-1][i]);
//    for(int x:v) cout << x << " ";
//    cout << "\n";
    int p=min(v[0], v[1]), q=min(v[2], v[3]), r=min(v[4], v[5]);
    v[0]-=p, v[1]-=p;
    int ans=p+q+r;
    ans+=2*max(v[0], v[1]);
    return ans;
}

//int main() {
//    int n;
//    cin >> n;
//    string a, b;
//    cin >> a >> b;
//    init(a, b);
//    cout << get_distance(1, 3) << "\n";
//
//}

• Subtask 1: 21 / 21
• Subtask 2: 22 / 22
• Subtask 3: 13 / 13
• Subtask 4: 28 / 28
• Subtask 5: 16 / 16