Submission #1303996

#	Time	Username	Problem	Language	Result	Execution time	Memory
1303996		nekolie	Mutating DNA (IOI21_dna)	C++20	Compilation error	0 ms	0 KiB

dna

#include <bits/stdc++.h>
using namespace std;

const int M = 100001;
int ile[M][7];
void init(string a, string b) {
    for (int i = 0; i < a.size(); i++) {
        for (int j = 0; j < 7; j++)
            ile[i+1][j] = ile[i][j];
        if (a[i] == b[i])
            ile[i+1][0]++;
        else if (a[i] == 'A' && b[i] = 'C')
            ile[i+1][1]++;
        else if (a[i] == 'A' && b[i] = 'T')
            ile[i+1][2]++;
        else if (a[i] == 'C' && b[i] = 'A')
            ile[i+1][3]++;
        else if (a[i] == 'C' && b[i] = 'T')
            ile[i+1][4]++;
        else if (a[i] == 'T' && b[i] = 'A')
            ile[i+1][5]++;
        else if (a[i] == 'T' && b[i] = 'C')
            ile[i+1][6]++;
    }
}
int get_distance(int x, int y) {
    int cnt[7], pom, odp = 0;
    for (int i = 0; i < 7; i++)
        cnt[i] = ile[y][i]-ile[x-1][i];
    pom = min(cnt[1],cnt[3]), cnt[1] -= pom, cnt[3] -= pom, odp += pom;
    pom = min(cnt[2],cnt[5]), cnt[2] -= pom, cnt[5] -= pom, odp += pom;
    pom = min(cnt[4],cnt[6]), cnt[4] -= pom, cnt[6] -= pom, odp += pom;
    return odp + 2*(*max_element(cnt+1,cnt+7));
}

Compilation message (stderr)

dna.cpp: In function 'void init(std::string, std::string)':
dna.cpp:12:30: error: lvalue required as left operand of assignment
   12 |         else if (a[i] == 'A' && b[i] = 'C')
dna.cpp:14:30: error: lvalue required as left operand of assignment
   14 |         else if (a[i] == 'A' && b[i] = 'T')
dna.cpp:16:30: error: lvalue required as left operand of assignment
   16 |         else if (a[i] == 'C' && b[i] = 'A')
dna.cpp:18:30: error: lvalue required as left operand of assignment
   18 |         else if (a[i] == 'C' && b[i] = 'T')
dna.cpp:20:30: error: lvalue required as left operand of assignment
   20 |         else if (a[i] == 'T' && b[i] = 'A')
dna.cpp:22:30: error: lvalue required as left operand of assignment
   22 |         else if (a[i] == 'T' && b[i] = 'C')