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OI-codes/LibreOJ/10014/data/divide_b.cpp

43 lines
820 B (Stored with Git LFS)
C++

#include <cstdio>
#include <algorithm>
using namespace std;
const int MXN = 100000;
int n, m;
int a[MXN];
int check(int m) {
int t, ans;
t = 0;
ans = 1;
for (int i = 0; i < n; i++) {
if (t + a[i] <= m)
t += a[i];
else {
t = a[i];
ans++;
}
}
return ans;
}
int main() {
freopen("divide_b4.in", "r", stdin);
freopen("divide_b4.out", "w", stdout);
scanf("%d%d", &n, &m);
int l = 0;
int r = 0;
for (int i = 0; i < n; i++) {
scanf("%d", &a[i]);
r += a[i];
l = max(l, a[i]);
}
while (l < r) {
int mid = (l + r) / 2;
if (check(mid) <= m)
r = mid;
else
l = mid + 1;
}
printf("%d\n", l);
}