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#include <stdio.h> int arr[2001][2001]; int N; int M; int main(void) { scanf("%d", &N); for(int i=0; i<N; i++){ scanf("%d", &arr[0][i+1]); arr[i+1][0] = arr[0][i+1]; } /* printf("arr1\n"); for(int i=0; i<=N; i++){ for(int k=0; k<=N; k++){ printf(" %d ", arr[i][k]); } printf("\n"); } printf("\n"); */ for(int i=1; i<=N; i++){ for(int j=1; j<=N; j++){ arr[i][j] = 0; } } for(int i=0; i<N; i++){ for(int k=1; k<=N-i; k++){ if(i==0){ arr[k][i+k] = 1; }else if(i==1){ if(arr[k][0] == arr[0][i+k]){ arr[k][i+k] = 1; } }else{ if(arr[k+1][i+k-1]==1 && arr[k][0] == arr[0][k+i]){ arr[k][i+k] = 1; } } } } /* printf("arr2\n"); for(int i=0; i<=N; i++){ for(int k=0; k<=N; k++){ printf(" %d ", arr[i][k]); } printf("\n"); } printf("\n"); */ scanf("%d", &M); for(int i=0; i<M; i++){ int a, b; scanf("%d %d", &a, &b); //printf("\n%d\n", arr[a][b]); printf("%d\n", arr[a][b]); } return 0; }
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