$O(1)$
#include<cstdio> int a[10], r; int main() { for (int i = 0; i < 10; i++) scanf("%d", a + i); for (int i = 0, x; i < 10; i++) scanf("%d", &x), r += x == a[i] ? 0 : a[i]>x ? 1 : -1; puts(r ? r>0 ? "A" : "B" : "D"); return 0; }
#include<cstdio> int a[10], r; int main() { for (int i = 0; i < 10; i++) scanf("%d", a + i); for (int i = 0, x; i < 10; i++) scanf("%d", &x), r += x == a[i] ? 0 : a[i]>x ? 1 : -1; puts(r ? r>0 ? "A" : "B" : "D"); return 0; }
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