Submission #2501071


Source Code Expand

#include <iostream>
#include <vector>
#include <map>
#include <algorithm>
#define rep(i, n) for(int i = 0; i<n; i++)

using namespace std;

int main(void) {
    string s;
    int k;
    cin >> s >> k;
    k--;

    vector<string> subs;
    map<string, bool> memo;

    rep(start, s.size()) {
        string si = s.substr(start, 1);
        if(subs.size()==k+1 and si > subs[k]) continue;
        rep(li, s.size()-start) {
            int l = li+1;
            string si = s.substr(start, l);
            if(subs.size()==k+1 and si > subs[k]) break;
            auto it = lower_bound(subs.begin(), subs.end(), si);
            if (memo.count(si)) continue;
            // cout << si << endl;

            subs.insert(it, si);
            if (subs.size() > k) subs.resize(k+1);
            memo[si] = true;
        }
    }
    cout << subs[k] << endl; 
}

Submission Info

Submission Time
Task C - K-th Substring
User frnfnts
Language C++14 (GCC 5.4.1)
Score 300
Code Size 888 Byte
Status AC
Exec Time 23 ms
Memory 256 KB

Judge Result

Set Name Sample Subtask All
Score / Max Score 0 / 0 200 / 200 100 / 100
Status
AC × 3
AC × 11
AC × 19
Set Name Test Cases
Sample 0_000.txt, 0_001.txt, 0_002.txt
Subtask 0_000.txt, 0_001.txt, 0_002.txt, 1_003.txt, 1_004.txt, 1_005.txt, 1_006.txt, 1_007.txt, 1_008.txt, 1_009.txt, 1_010.txt
All 0_000.txt, 0_001.txt, 0_002.txt, 1_003.txt, 1_004.txt, 1_005.txt, 1_006.txt, 1_007.txt, 1_008.txt, 1_009.txt, 1_010.txt, 2_011.txt, 2_012.txt, 2_013.txt, 2_014.txt, 2_015.txt, 2_016.txt, 2_017.txt, 2_018.txt
Case Name Status Exec Time Memory
0_000.txt AC 1 ms 256 KB
0_001.txt AC 23 ms 256 KB
0_002.txt AC 1 ms 256 KB
1_003.txt AC 1 ms 256 KB
1_004.txt AC 1 ms 256 KB
1_005.txt AC 1 ms 256 KB
1_006.txt AC 1 ms 256 KB
1_007.txt AC 1 ms 256 KB
1_008.txt AC 1 ms 256 KB
1_009.txt AC 1 ms 256 KB
1_010.txt AC 1 ms 256 KB
2_011.txt AC 5 ms 256 KB
2_012.txt AC 5 ms 256 KB
2_013.txt AC 2 ms 256 KB
2_014.txt AC 2 ms 256 KB
2_015.txt AC 1 ms 256 KB
2_016.txt AC 2 ms 256 KB
2_017.txt AC 2 ms 256 KB
2_018.txt AC 2 ms 256 KB