// UVa 10790 - How Many Points of Intersection? #include <iostream> #include <stdio.h> using namespace std; #define datatype unsigned long long int int main() { datatype a, b; cin >> a >> b; int t = 0; while (a || b) { t++; datatype sol = (a * a - a * (a + 1) / 2) * ((b - 1) * b / 2); printf("Case %d: %llu\n", t, sol); cin >> a >> b; } return 0; }
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