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P1182 数列分段 Section II
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problem/P1182/P1182.cpp
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38
problem/P1182/P1182.cpp
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#include <bits/stdc++.h>
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using namespace std;
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int n, m, a[100005], l, r, mid, ans;
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bool check(int x) {
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int tot = 0, num = 0;
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for (int i = 1; i <= n; i++) {
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if (tot + a[i] <= x) {
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tot += a[i];
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}
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else {
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tot = a[i];
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num++;
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}
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}
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return num >= m;
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}
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int main() {
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cin >> n >> m;
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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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mid = l + r >> 1;
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if (check(mid)) {
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l = mid + 1;
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}
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else {
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r = mid - 1;
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}
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}
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cout << l << endl;
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return 0;
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}
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