AtCoder 332 A. Online Shopping (读懂题即可)
原题链接
简单
作者:
JustDoIt11
,
2023-12-11 11:01:36
,
所有人可见
,
阅读 62
package AtCoder.begin332;
import java.util.Scanner;
public class A {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int n = sc.nextInt(), s = sc.nextInt(), k = sc.nextInt();
int[] p = new int[n + 10], q = new int[n + 10];
for (int i = 1; i <= n; i ++ ) {
p[i] = sc.nextInt();
q[i] = sc.nextInt();
}
long ans = 0;
for (int i = 1; i <= n; i ++ ) ans += (long) p[i] * q[i];
if (ans >= s) System.out.println(ans);
else System.out.println(ans + k);
}
}