oj.uz

답안 #90594

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
90594 2018-12-22T19:00:42 Z popovicirobert 성질 급한 지학이 (IZhO13_crazy) C++14
0 / 100
 2 ms 380 KB 
#include <bits/stdc++.h>
#define lsb(x) (x & (-x))
#define ll long long
#define ull unsigned long long
#define ld long double
// 217
// 44

using namespace std;

const int MAXN = (int) 1e5;

int arr[MAXN + 1];

int main() {
    //ifstream cin("A.in");
    //ofstream cout("A.out");
    int i, t, n;
    ios::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);
    cin >> t;
    while(t > 0) {
        t--;
        cin >> n;
        for(i = 1; i <= n; i++) {
            cin >> arr[i];
        }
        if(n == 1) {
            cout << 1 << "\n";
            continue;
        }
        if(arr[1] == 1) {
            if(arr[2] > 2) {
                bool ans = 0;
                for(i = 3; i <= n; i++) {
                    if(arr[i] != i - 1) {
                        cout << i - 1 << "\n";
                        ans = 1;
                        break;
                    }
                }
                if(ans == 0) {
                    cout << 0 << "\n";
                }
            }
            else {
                cout << 0 << "\n";
            }
        }
        else {
            bool ans = 0;
            for(i = 2; i <= n; i++) {
                if(arr[i] != i - 1) {
                    cout << i - 1 << "\n";
                    ans = 1;
                    break;
                }
            }
            if(ans == 0) {
                cout << 0 << "\n";
            }
        }
    }
    //cin.close();
    //cout.close();
    return 0;
}

Subtask #1
0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Incorrect 2 ms 380 KB Output isn't correct
3 Halted 0 ms 0 KB -