Submission #631204

#	Time	Username	Problem	Language	Result	Execution time	Memory
631204		qwerasdfzxcl	Mutating DNA (IOI21_dna)	C++17	100 / 100	36 ms	7192 KiB

dna

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

using namespace std;
typedef long long ll;
int n, S[100100][9], mp[202];

void init(std::string a, std::string b) {
    n = a.size();
    mp['A'] = 0, mp['C'] = 1, mp['T'] = 2;
    for (int i=0;i<n;i++){
        int cur = mp[a[i]]*3+mp[b[i]];
        for (int j=0;j<9;j++) S[i+1][j] = S[i][j];
        S[i+1][cur]++;
    }
}

int get_distance(int x, int y) {
    x++, y++;
    int cur[9], ret = 0;
    for (int j=0;j<9;j++) cur[j] = S[y][j] - S[x-1][j];
    //for (int j=0;j<9;j++) printf("%d ", cur[j]);
    //printf("\n");
    if (cur[0]+cur[1]+cur[2]!=cur[0]+cur[3]+cur[6]) return -1;
    if (cur[3]+cur[4]+cur[5]!=cur[1]+cur[4]+cur[7]) return -1;
    if (cur[6]+cur[7]+cur[8]!=cur[2]+cur[5]+cur[8]) return -1;
    int tmp1 = min(cur[2], cur[6]), tmp2 = min(cur[1], cur[3]), tmp3 = min(cur[5], cur[7]);
    ret += tmp1+tmp2+tmp3;
    cur[2] -= tmp1, cur[6] -= tmp1;
    cur[1] -= tmp2, cur[3] -= tmp2;
    cur[5] -= tmp3, cur[7] -= tmp3;
    return ret+cur[1]*2+cur[2]*2;

}

Compilation message (stderr)

dna.cpp: In function 'void init(std::string, std::string)':
dna.cpp:12:26: warning: array subscript has type 'char' [-Wchar-subscripts]
   12 |         int cur = mp[a[i]]*3+mp[b[i]];
      |                          ^
dna.cpp:12:37: warning: array subscript has type 'char' [-Wchar-subscripts]
   12 |         int cur = mp[a[i]]*3+mp[b[i]];
      |                                     ^

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