제출 #1126639

#제출 시각아이디문제언어결과실행 시간메모리
1126639Halym2007세 명의 친구들 (BOI14_friends)C++17
0 / 100
1094 ms4324 KiB
#include <bits/stdc++.h> using namespace std; #define ll long long #define sz size() #define ff first #define ss second #define pb push_back #define pii pair <int, int> #define dur exit(0) #define dur1 return(0) const int N = 2e5 + 5; int main () { // freopen ("input.txt", "r", stdin); ios::sync_with_stdio(0);cin.tie(0);cout.tie(0); int n; string s; cin >> n >> s; if (n % 2 == 0) { cout << "NOT POSSIBLE\n"; return 0; } s = " " + s; int san = 0, idx = 0; for (int i = 1; i <= n; ++i) { int ok = 0; for (int j = 1; j <= n; ++j) { if (j == i) continue; int l = j, r = j + (n / 2); if (l <= i and i <= r) { r++; } if (r > n) break; if (s[l] != s[r]) { ok = 1; break; } } if (!ok) { san++; idx = i; } } if (!san) { cout << "NOT POSSIBLE\n"; } else if (san == 1) { for (int i = 1; i <= (n / 2) + (idx <= (n / 2) ? 1 : 0); ++i) { if (idx == i) continue; cout << s[i]; } cout << "\n"; } else { assert (1 != 0); cout << "NOT UNIQUE\n"; } }
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