Submission #453801

#	Time	Username	Problem	Language	Result	Execution time	Memory
453801		RGBB	Mutating DNA (IOI21_dna)	C++17	Compilation error	0 ms	0 KiB

dna

#include <iostream>
#include <bits/stdc++.h>
using namespace std;
const int MAXN=1e5;
int n,psa[MAXN][3][2],diff[MAXN][3][3],temp[3][3];
map<char,int>cmp;
int get_distance(int x,int y){
    for(int i=0;i<3;i++){
        int an=psa[y][i][0]-(x!=0?psa[x-1][i][0]:0);
        int bn=psa[y][i][1]-(x!=0?psa[x-1][i][1]:0);
        if(an!=bn)return -1;
    }
    int ret=0;
    for(int i=0;i<3;i++){
        for(int j=0;j<3;j++){
            temp[i][j]=diff[y][i][j]-(x!=0?diff[x-1][i][j]:0);
        }
    }
    for(int i=0;i<3;i++){
        for(int j=0;j<3;j++){
            if(i==j)continue;
            int m=min(temp[i][j],temp[j][i]);
            ret+=m;
            temp[i][j]-=m;
            temp[j][i]-=m;
        }
    }
    int s=0;
    for(int i=0;i<3;i++){
        for(int j=0;j<3;j++){
            if(i==j)continue;
            s+=temp[i][j];
        }
    }
    s*=2;
    s/=3;
    ret+=s;
    return ret;
}
void init(string a,string b){
    n=a.length();
    cmp['A']=0;
    cmp['T']=1;
    cmp['C']=2;
    for(int i=0;i<n;i++){
        if(i!=0){
            for(int j=0;j<3;j++){
                for(int k=0;k<2;k++){
                    psa[i][j][k]=psa[i-1][j][k];
                }
            }
            for(int j=0;j<3;j++){
                for(int k=0;k<3;k++){
                    diff[i][j][k]=diff[i-1][j][k];
                }
            }
        }
        psa[i][cmp[a[i]]][0]++;
        psa[i][cmp[b[i]]][1]++;
        diff[i][cmp[a[i]]][cmp[b[i]]]++;
    }
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    init("ATCATCA","AATCATC");
    cout<<get_distance(0,6)<<"\n";
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccd2sFCa.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccDa3si7.o:dna.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status