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24
TangDou/LuoGuBook/P3817.cpp
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24
TangDou/LuoGuBook/P3817.cpp
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#include <bits/stdc++.h>
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using namespace std;
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typedef long long LL;
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//题解:都要吃最后的,这样才最少。
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const int N = 100010;
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int a[N];
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LL ans = 0; //因为是累加和,注意小心是long long
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int n, x; //糖果盒的个数 n,给定的参数 x(不能超过x)
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int main() {
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cin >> n >> x;
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for (int i = 1; i <= n; i++) cin >> a[i];
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for (int i = 1; i < n; i++) {
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if (a[i] + a[i + 1] > x) { //两个长度的滑动窗口
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ans += a[i + 1] + a[i] - x; //吃掉的糖数量
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a[i + 1] = x - a[i]; //a[i+1]剩余的数量。这个差,要在后面那个盒子里出,这样才最有效。
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}
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}
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cout << ans << endl;
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return 0;
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}
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