Submission #952249

#	Time	Username	Problem	Language	Result	Execution time	Memory
952249		wood	Mutating DNA (IOI21_dna)	C++17	Compilation error	0 ms	0 KiB

dna

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

typedef long long ll;
typedef pair<int, int> p32;
typedef pair<ll, ll> p64;
#define pb push_back
#define eb emplace_back
#define fi first
#define se second
#define fast_cin() ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
#define MOD %1000000007

vector<int> pref_b;
vector<int> pref_a;

vector<int> matchpref;
void init(string a, string b) {
    int n = a.size();
    pref_a.resize(n+1);
    pref_b.resize(n+1);
    matchpref.resize(n+1);
    for (size_t i = 0; i < a.size(); i++) {
        pref_a[i + 1] = pref_a[i] + (a[i] == 'A');
        pref_b[i + 1] = pref_b[i] + (b[i] == 'A');
        matchpref[i + 1] = matchpref[i]+(a[i] == 'A') && (b[i] == 'A');
    }
}

int get_distance(int x, int y) {
    if (pref_a[y + 1] - pref_a[x] - pref_b[y + 1] - pref_b[x]) {
        return -1;
    }
    else return (pref_a[y + 1] - pref_a[x] - matchpref[y + 1] + matchpref[x]);
}

#ifndef ONLINE_JUDGE
int main()
{
    fast_cin();
    init("AT","AT");
    cout<<get_distance(0,1)<<"\n";
    return 0;
}
#endif

Compilation message (stderr)

/usr/bin/ld: /tmp/ccU5MRbd.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccEnrAFe.o:dna.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status