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- #include <stdio.h>
- int main()
- {
- long long m, n, a, b;
- int i;
- while (scanf("%lld %lld", &m, &n) != EOF) {
- a = 1;
- b = 1;
- for (i = m; i > 0; --i) {
- a *= m;
- m--;
- }
- for (i = n; i > 0; --i) {
- b *= n;
- n--;
- }
- printf("%lld\n", a + b);
- }
- return 0;
- }
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