Submission #494039

#	Time	Username	Problem	Language	Result	Execution time	Memory
494039		Tsiannis	Mutating DNA (IOI21_dna)	C++17	Compilation error	0 ms	0 KiB

dna

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define maxn 100005
ll a1[maxn],c1[maxn],t1[maxn],a2[maxn],c2[maxn],t2[maxn],diff[maxn];
void init(string a,string b)
{
int n=a.size();
    for (int i=0;i<n;i++)
    {
        a1[i+1]=a1[i];
        c1[i+1]=c1[i];
        t1[i+1]=t1[i];
        a2[i+1]=a2[i];
        c2[i+1]=c2[i];
        t2[i+1]=t2[i];
        diff[i+1]=diff[i];
        if (a[i]=='A')
        a1[i+1]=a1[i]+1;
        else if (a[i]=='C')
        c1[i+1]=c1[i]+1;
        else
        t1[i+1]=t1[i]+1;
         if (b[i]=='A')
        a2[i+1]=a2[i]+1;
        else if (b[i]=='C')
        c2[i+1]=c2[i]+1;
        else
        t2[i+1]=t2[i]+1;
        if (a[i]!=b[i])
        {diff[i+1]=diff[i]+1;}
    }
}
int get_distance(int x,int y)
{
    int pla1=a1[y+1]-a1[x];
    int plc1=c1[y+1]-c1[x];
    int plt1=t1[y+1]-t1[x];
    int pla2=a2[y+1]-a2[x];
    int plc2=c2[y+1]-c2[x];
    int plt2=t2[y+1]-t2[x];
    int d=diff[y+1]-diff[x];
    if (pla1!=pla2||plc1!=plc2||plt1!=plt2)
    return -1;
    else
    return (d/2+d%2);
}
int main()
{
    int n,q;
    cin>>n>>q;
    string s1,s2;
    cin>>s1>>s2;
    init(s1,s2);
    while(q--)
    {
        int x,y;
        cin>>x>>y;
        cout<<get_distance(x,y)<<endl;
    }
    return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccj3xlmF.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccQzLDMG.o:dna.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status