#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
/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
