python/TangDou/AcWing_TiGao/T5/GameTheory/1322.cpp

#include <cstdio>

using namespace std;

const int N = 1010;

int n;
int a[N];
int left[N][N], right[N][N];

int main() {
    int T;
    scanf("%d", &T);
    while (T--) {
        scanf("%d", &n);
        for (int i = 1; i <= n; i++) scanf("%d", &a[i]);

        for (int len = 1; len <= n; len++)
            for (int i = 1; i + len - 1 <= n; i++) {
                int j = i + len - 1;
                if (len == 1)
                    left[i][j] = right[i][j] = a[i];
                else {
                    int L = left[i][j - 1], R = right[i][j - 1], X = a[j];
                    if (R == X)
                        left[i][j] = 0;
                    else if (X < L && X < R || X > L && X > R)
                        left[i][j] = X;
                    else if (L > R)
                        left[i][j] = X - 1;
                    else
                        left[i][j] = X + 1;

                    L = left[i + 1][j], R = right[i + 1][j], X = a[i];
                    if (L == X)
                        right[i][j] = 0;
                    else if (X < L && X < R || X > L && X > R)
                        right[i][j] = X;
                    else if (R > L)
                        right[i][j] = X - 1;
                    else
                        right[i][j] = X + 1;
                }
            }

        if (n == 1)
            puts("1");
        else
            printf("%d\n", left[2][n] != a[1]);
    }

    return 0;
}