Submission #930699

#	Time	Username	Problem	Language	Result	Execution time	Memory
930699		yeehaw	Three Friends (BOI14_friends)	C++17	100 / 100	31 ms	9980 KiB

friends

#include <bits/stdc++.h>
using namespace std;
#define int long long
// #pragma GCC optimize("O3,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

int32_t main(){
    ios::sync_with_stdio(0);cin.tie(0);
    int n;cin>>n;
    if(n%2==0){
        cout<<"NOT POSSIBLE";
        return 0;
    }
    int s=n/2;
    char a[n],a1[s+1],a2[s],b1[s+1],b2[s];
    for(int i=0;i<n;i++)cin>>a[i];
    for(int i=0;i<s+1;i++)a1[i]=a[i];
    for(int i=0;i<s;i++)a2[i]=a[i+s+1];
    for(int i=0;i<s;i++)b2[i]=a[i];
    for(int i=0;i<s+1;i++)b1[i]=a[i+s];
    // for(int i=0;i<s+1;i++)cout<<a1[i];
    // cout<<"\n";
    // for(int i=0;i<s;i++)cout<<a2[i];
    // cout<<"\n";
    // for(int i=0;i<s+1;i++)cout<<b1[i];
    // cout<<"\n";
    // for(int i=0;i<s;i++)cout<<b2[i];
    // cout<<"\n";
    string s1,s2;
    int c=0,one=1,two=1;
    for(int i=0;i<s;i++){
        if(a1[i+c]==a2[i])s1+=a2[i];
        else{
            if(c){
                one=0;
                break;
            }
            c++;
            i--;
        }
    }
    c=0;
    for(int i=0;i<s;i++){
        if(b1[i+c]==b2[i])s2+=b2[i];
        else{
            if(c){
                two=0;
                break;
            }
            c++;
            i--;
        }
    }
    if(one==0&&two==0)cout<<"NOT POSSIBLE";
    else if(one&&two){
        if(s1==s2)cout<<s1;
        else cout<<"NOT UNIQUE";
    }else{
        if(one)cout<<s1;
        else cout<<s2;
    }
}

• Subtask 1: 35 / 35
• Subtask 2: 65 / 65