oj.uz

Submission #105809

# Submission time Handle Problem Language Result Execution time Memory
105809 2019-04-15T06:17:38 Z xiaowuc1 Three Friends (BOI14_friends) C++14
100 / 100
 24 ms 7452 KB 
#include <algorithm>
#include <cassert>
#include <cstring>
#include <iomanip>
#include <iostream>
#include <map>
#include <queue>
#include <random>
#include <set>
#include <vector>

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<int, pii> pipii;
typedef vector<vector<ll>> matrix;

bool can(string a, string b) {
	int aIdx = 0;
	for(int i = 0; i < b.size() && aIdx < a.size(); i++) {
		if(b[i] == a[aIdx]) aIdx++;
	}
	return aIdx == a.size();
}

void solve() {
	int n;
	string s;
	cin >> n >> s;
	if(n%2==0) {
		cout << "NOT POSSIBLE\n";
		return;
	}
	n /= 2;
	set<string> ret;
	if(can(s.substr(0, n), s.substr(n))) {
		ret.insert(s.substr(0, n));
	}
	if(can(s.substr(n+1), s.substr(0, n+1))) {
		ret.insert(s.substr(n+1));
	}
	if(ret.size() > 1) cout << "NOT UNIQUE\n";
	else if(ret.empty()) cout << "NOT POSSIBLE\n";
	else cout << *ret.begin() << "\n";
}

int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL); cout.tie(NULL);
	/*
  int t;
  cin >> t;
  for(int i = 1; i <= t; i++) {
    cout << "Case #" << i << ": ";
    solve();
  }
	*/
	solve();
}

Compilation message

friends.cpp: In function 'bool can(std::__cxx11::string, std::__cxx11::string)':
friends.cpp:21:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < b.size() && aIdx < a.size(); i++) {
                 ~~^~~~~~~~~~
friends.cpp:21:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < b.size() && aIdx < a.size(); i++) {
                                 ~~~~~^~~~~~~~~~
friends.cpp:24:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  return aIdx == a.size();
         ~~~~~^~~~~~~~~~~

Subtask #1
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 3 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 2 ms 384 KB Output is correct
16 Correct 3 ms 384 KB Output is correct
17 Correct 3 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 2 ms 384 KB Output is correct
20 Correct 2 ms 384 KB Output is correct
21 Correct 2 ms 384 KB Output is correct
22 Correct 2 ms 384 KB Output is correct
23 Correct 2 ms 256 KB Output is correct
24 Correct 2 ms 384 KB Output is correct
25 Correct 2 ms 384 KB Output is correct
26 Correct 2 ms 384 KB Output is correct
27 Correct 3 ms 384 KB Output is correct
28 Correct 2 ms 256 KB Output is correct
29 Correct 2 ms 384 KB Output is correct
30 Correct 2 ms 256 KB Output is correct
31 Correct 2 ms 384 KB Output is correct
32 Correct 3 ms 256 KB Output is correct
33 Correct 2 ms 384 KB Output is correct
34 Correct 2 ms 384 KB Output is correct
35 Correct 2 ms 256 KB Output is correct
36 Correct 2 ms 384 KB Output is correct
37 Correct 2 ms 384 KB Output is correct
38 Correct 2 ms 284 KB Output is correct
39 Correct 2 ms 384 KB Output is correct
40 Correct 2 ms 384 KB Output is correct
41 Correct 2 ms 256 KB Output is correct
42 Correct 3 ms 384 KB Output is correct
43 Correct 3 ms 384 KB Output is correct
44 Correct 3 ms 384 KB Output is correct
45 Correct 2 ms 384 KB Output is correct
46 Correct 2 ms 384 KB Output is correct
47 Correct 2 ms 384 KB Output is correct
48 Correct 2 ms 384 KB Output is correct
49 Correct 2 ms 384 KB Output is correct
50 Correct 3 ms 384 KB Output is correct
51 Correct 3 ms 384 KB Output is correct
52 Correct 3 ms 384 KB Output is correct
53 Correct 3 ms 384 KB Output is correct
54 Correct 2 ms 384 KB Output is correct

Subtask #2
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 4356 KB Output is correct
2 Correct 20 ms 4312 KB Output is correct
3 Correct 22 ms 4356 KB Output is correct
4 Correct 24 ms 4452 KB Output is correct
5 Correct 20 ms 4344 KB Output is correct
6 Correct 6 ms 2468 KB Output is correct
7 Correct 23 ms 7172 KB Output is correct
8 Correct 17 ms 6564 KB Output is correct
9 Correct 20 ms 7452 KB Output is correct
10 Correct 21 ms 6560 KB Output is correct
11 Correct 18 ms 5284 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 512 KB Output is correct
14 Correct 3 ms 384 KB Output is correct
15 Correct 2 ms 384 KB Output is correct
16 Correct 2 ms 256 KB Output is correct
17 Correct 2 ms 384 KB Output is correct
18 Correct 3 ms 384 KB Output is correct
19 Correct 2 ms 384 KB Output is correct
20 Correct 2 ms 384 KB Output is correct
21 Correct 2 ms 384 KB Output is correct
22 Correct 2 ms 384 KB Output is correct
23 Correct 2 ms 384 KB Output is correct
24 Correct 2 ms 256 KB Output is correct
25 Correct 2 ms 256 KB Output is correct
26 Correct 3 ms 384 KB Output is correct
27 Correct 2 ms 256 KB Output is correct
28 Correct 2 ms 256 KB Output is correct
29 Correct 3 ms 384 KB Output is correct
30 Correct 2 ms 384 KB Output is correct
31 Correct 2 ms 384 KB Output is correct
32 Correct 2 ms 256 KB Output is correct
33 Correct 2 ms 384 KB Output is correct
34 Correct 2 ms 384 KB Output is correct
35 Correct 2 ms 384 KB Output is correct
36 Correct 2 ms 256 KB Output is correct
37 Correct 2 ms 384 KB Output is correct
38 Correct 2 ms 384 KB Output is correct
39 Correct 2 ms 384 KB Output is correct
40 Correct 2 ms 384 KB Output is correct
41 Correct 2 ms 384 KB Output is correct
42 Correct 2 ms 384 KB Output is correct
43 Correct 2 ms 256 KB Output is correct
44 Correct 3 ms 384 KB Output is correct
45 Correct 3 ms 384 KB Output is correct
46 Correct 3 ms 384 KB Output is correct
47 Correct 3 ms 360 KB Output is correct
48 Correct 3 ms 384 KB Output is correct
49 Correct 3 ms 256 KB Output is correct
50 Correct 2 ms 384 KB Output is correct
51 Correct 3 ms 384 KB Output is correct
52 Correct 2 ms 384 KB Output is correct
53 Correct 2 ms 256 KB Output is correct
54 Correct 3 ms 384 KB Output is correct