http://poj.org/problem?id=2924 import java.util.*; import java.math.*; public class Main { public static void main(String[] args) { Scanner cin = new Scanner(System.in); int num = Integer.valueOf(cin.nextLine()).intValue(); for(int i = 0; i < num; i++) { String[] str = cin.nextLine().split(" "); BigInteger a = new BigInteger(str[0]); BigInteger b = new BigInteger(str[1]); BigInteger result = new BigInteger("0"); if((a.intValue() >= 0 && b.intValue() >= 0) || (a.intValue() < 0 && b.intValue() < 0)) { int times = (Math.abs(b.intValue()-a.intValue())+1); result = result.add(a); result = result.add(b); result = result.multiply(new BigInteger(times + "")); result = result.divide(new BigInteger("2")); } else { int times1 = (Math.abs(b.intValue()-0)+1); BigInteger r1 = new BigInteger("0"); r1 = r1.add(b); r1 = r1.multiply(new BigInteger(times1 + "")); r1 = r1.divide(new BigInteger("2")); int times2 = (Math.abs(a.intValue()-0)+1); BigInteger r2 = new BigInteger("0"); r2 = r2.add(a); r2 = r2.multiply(new BigInteger(times2 + "")); r2 = r2.divide(new BigInteger("2")); result = r1.add(r2); } System.out.println("Scenario #" + (i+1) + ":"); System.out.println(result.toString()); if(i != num-1) System.out.println(); } } }
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