45 lines
930 B
C++
45 lines
930 B
C++
#include <bits/stdc++.h>
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using namespace std;
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const int N = 100010;
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int a[N];
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int n, m;
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//检查函数
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bool check(int mid) {
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int cnt = 1; //最小一个区间
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int sum = 0; //区间和
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for (int i = 1; i <= n; i++) {
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//区间和计算
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sum += a[i];
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//如果超过了mid值
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if (sum > mid) {
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cnt++; //需要下一个段了~
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sum = a[i];
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}
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}
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//是否符合题意的要求，在m个区间段范围内？
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return cnt <= m;
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}
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int l, r;
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int main() {
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cin >> n >> m;
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//输入
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for (int i = 1; i <= n; i++) {
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cin >> a[i];
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l = max(l, a[i]);
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r += a[i];
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}
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while (l < r) {
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int mid = l + r >> 1; //mid的定义：每段和
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if (check(mid)) r = mid;//向左逼近
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else l = mid + 1;
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}
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//输出大吉
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cout << l << endl;
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return 0;
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}
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