练11.3 等差数列末项计算

黄腾钰xz LV 7 @ 2026-7-2 11:20:58

```#include <iostream>
using namespace std;

int main() {
	long long int a1, a2, n;
	cin >> a1 >> a2 >> n;
	cout << (a2 - a1)*(n - 1) + a1;
	return 0;
}

language

0
牛犇2026dly LV 6 @ 2026-2-2 12:25:22

#include <bits/stdc++.h>

using namespace std; int main() { int a, b, c; cin >> a >> b >> c; cout << a + (c - 1)*(b - a); return 0; }
-1
丁资凡2026dly LV 7 @ 2026-1-9 13:42:50

#include <bits/stdc++.h> using namespace std;

int main() { int a, b, c; cin >> a >> b >> c; printf("%d", a + (b - a) * (c - 1)); return 0; }