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18 lines
331 B
18 lines
331 B
#include <bits/stdc++.h>
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using namespace std;
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typedef long long LL;
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const int N = 1000010;
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int a[N];
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LL ans;
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int n;
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//贪心法
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int main() {
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cin >> n;
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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++) if (a[i] > a[i - 1]) ans += a[i] - a[i - 1];
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cout << ans;
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return 0;
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} |