#include <bits/stdc++.h>
#define fi first
#define se second
#define y1 theboatman
using namespace std;
typedef long long ll;
const int N = int(1e6) + 10;
const int inf = int(1e9) + 10;
const long long INF = ll(1e18) + 10;
vector <ll> pref;
ll get(int l, int r) {
return pref[r] - (l ? pref[l - 1] : 0);
}
int main() {
cin.tie(0);
ios::sync_with_stdio(0);
int n;
cin >> n;
vector <int> a(n);
for(int i = 0; i < n; i++) {
cin >> a[i];
}
pref.resize(n);
for(int i = 0; i < n; i++) {
pref[i] = (i ? pref[i - 1] + a[i] : a[i]);
}
vector <pair <ll, int> > dp(n);
for(int i = 0; i < n; i++) {
dp[i] = {get(0, i), 1};
}
vector <pair <ll, int> > lazy(n, {INF, inf});
pair <ll, int> now = {0LL, -1};
for(int i = 0; i < n; i++) {
now.fi += a[i];
now = min(now, lazy[i]);
dp[i] = min(dp[i], now);
if (i + 1 == n || get(i + 1, n - 1) < now.fi) {
continue;
}
int l = i + 1, r = n - 1;
while(l < r) {
int c = l + r >> 1;
if (get(i + 1, c) < now.fi) {
l = c + 1;
}
else {
r = c;
}
}
lazy[l] = min(lazy[l], {get(i + 1, l), now.se - 1});
}
cout << -dp[n - 1].se << "\n";
return 0;
}
/*
*/
Compilation message
segments.cpp: In function 'int main()':
segments.cpp:57:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
int c = l + r >> 1;
~~^~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
376 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
380 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
376 KB |
Output is correct |
| 10 |
Correct |
2 ms |
376 KB |
Output is correct |
| 11 |
Correct |
2 ms |
380 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
376 KB |
Output is correct |
| 14 |
Correct |
2 ms |
376 KB |
Output is correct |
| 15 |
Correct |
2 ms |
376 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
376 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
380 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
376 KB |
Output is correct |
| 10 |
Correct |
2 ms |
376 KB |
Output is correct |
| 11 |
Correct |
2 ms |
380 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
376 KB |
Output is correct |
| 14 |
Correct |
2 ms |
376 KB |
Output is correct |
| 15 |
Correct |
2 ms |
376 KB |
Output is correct |
| 16 |
Correct |
2 ms |
376 KB |
Output is correct |
| 17 |
Correct |
2 ms |
376 KB |
Output is correct |
| 18 |
Correct |
2 ms |
376 KB |
Output is correct |
| 19 |
Correct |
2 ms |
452 KB |
Output is correct |
| 20 |
Correct |
2 ms |
376 KB |
Output is correct |
| 21 |
Correct |
2 ms |
376 KB |
Output is correct |
| 22 |
Correct |
2 ms |
412 KB |
Output is correct |
| 23 |
Correct |
2 ms |
376 KB |
Output is correct |
| 24 |
Correct |
2 ms |
376 KB |
Output is correct |
| 25 |
Correct |
2 ms |
380 KB |
Output is correct |
| 26 |
Correct |
2 ms |
376 KB |
Output is correct |
| 27 |
Correct |
2 ms |
376 KB |
Output is correct |
| 28 |
Correct |
2 ms |
376 KB |
Output is correct |
| 29 |
Correct |
2 ms |
376 KB |
Output is correct |
| 30 |
Correct |
2 ms |
376 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
376 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
380 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
376 KB |
Output is correct |
| 10 |
Correct |
2 ms |
376 KB |
Output is correct |
| 11 |
Correct |
2 ms |
380 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
376 KB |
Output is correct |
| 14 |
Correct |
2 ms |
376 KB |
Output is correct |
| 15 |
Correct |
2 ms |
376 KB |
Output is correct |
| 16 |
Correct |
2 ms |
376 KB |
Output is correct |
| 17 |
Correct |
2 ms |
376 KB |
Output is correct |
| 18 |
Correct |
2 ms |
376 KB |
Output is correct |
| 19 |
Correct |
2 ms |
452 KB |
Output is correct |
| 20 |
Correct |
2 ms |
376 KB |
Output is correct |
| 21 |
Correct |
2 ms |
376 KB |
Output is correct |
| 22 |
Correct |
2 ms |
412 KB |
Output is correct |
| 23 |
Correct |
2 ms |
376 KB |
Output is correct |
| 24 |
Correct |
2 ms |
376 KB |
Output is correct |
| 25 |
Correct |
2 ms |
380 KB |
Output is correct |
| 26 |
Correct |
2 ms |
376 KB |
Output is correct |
| 27 |
Correct |
2 ms |
376 KB |
Output is correct |
| 28 |
Correct |
2 ms |
376 KB |
Output is correct |
| 29 |
Correct |
2 ms |
376 KB |
Output is correct |
| 30 |
Correct |
2 ms |
376 KB |
Output is correct |
| 31 |
Correct |
2 ms |
504 KB |
Output is correct |
| 32 |
Correct |
3 ms |
504 KB |
Output is correct |
| 33 |
Correct |
3 ms |
476 KB |
Output is correct |
| 34 |
Correct |
3 ms |
504 KB |
Output is correct |
| 35 |
Correct |
3 ms |
508 KB |
Output is correct |
| 36 |
Correct |
3 ms |
504 KB |
Output is correct |
| 37 |
Correct |
3 ms |
504 KB |
Output is correct |
| 38 |
Correct |
3 ms |
376 KB |
Output is correct |
| 39 |
Correct |
3 ms |
504 KB |
Output is correct |
| 40 |
Correct |
3 ms |
504 KB |
Output is correct |
| 41 |
Correct |
3 ms |
504 KB |
Output is correct |
| 42 |
Correct |
3 ms |
508 KB |
Output is correct |
| 43 |
Correct |
3 ms |
508 KB |
Output is correct |
| 44 |
Correct |
3 ms |
504 KB |
Output is correct |
| 45 |
Correct |
4 ms |
504 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
376 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
380 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
376 KB |
Output is correct |
| 10 |
Correct |
2 ms |
376 KB |
Output is correct |
| 11 |
Correct |
2 ms |
380 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
376 KB |
Output is correct |
| 14 |
Correct |
2 ms |
376 KB |
Output is correct |
| 15 |
Correct |
2 ms |
376 KB |
Output is correct |
| 16 |
Correct |
2 ms |
376 KB |
Output is correct |
| 17 |
Correct |
2 ms |
376 KB |
Output is correct |
| 18 |
Correct |
2 ms |
376 KB |
Output is correct |
| 19 |
Correct |
2 ms |
452 KB |
Output is correct |
| 20 |
Correct |
2 ms |
376 KB |
Output is correct |
| 21 |
Correct |
2 ms |
376 KB |
Output is correct |
| 22 |
Correct |
2 ms |
412 KB |
Output is correct |
| 23 |
Correct |
2 ms |
376 KB |
Output is correct |
| 24 |
Correct |
2 ms |
376 KB |
Output is correct |
| 25 |
Correct |
2 ms |
380 KB |
Output is correct |
| 26 |
Correct |
2 ms |
376 KB |
Output is correct |
| 27 |
Correct |
2 ms |
376 KB |
Output is correct |
| 28 |
Correct |
2 ms |
376 KB |
Output is correct |
| 29 |
Correct |
2 ms |
376 KB |
Output is correct |
| 30 |
Correct |
2 ms |
376 KB |
Output is correct |
| 31 |
Correct |
2 ms |
504 KB |
Output is correct |
| 32 |
Correct |
3 ms |
504 KB |
Output is correct |
| 33 |
Correct |
3 ms |
476 KB |
Output is correct |
| 34 |
Correct |
3 ms |
504 KB |
Output is correct |
| 35 |
Correct |
3 ms |
508 KB |
Output is correct |
| 36 |
Correct |
3 ms |
504 KB |
Output is correct |
| 37 |
Correct |
3 ms |
504 KB |
Output is correct |
| 38 |
Correct |
3 ms |
376 KB |
Output is correct |
| 39 |
Correct |
3 ms |
504 KB |
Output is correct |
| 40 |
Correct |
3 ms |
504 KB |
Output is correct |
| 41 |
Correct |
3 ms |
504 KB |
Output is correct |
| 42 |
Correct |
3 ms |
508 KB |
Output is correct |
| 43 |
Correct |
3 ms |
508 KB |
Output is correct |
| 44 |
Correct |
3 ms |
504 KB |
Output is correct |
| 45 |
Correct |
4 ms |
504 KB |
Output is correct |
| 46 |
Correct |
15 ms |
5112 KB |
Output is correct |
| 47 |
Correct |
21 ms |
5112 KB |
Output is correct |
| 48 |
Correct |
23 ms |
5496 KB |
Output is correct |
| 49 |
Correct |
23 ms |
5624 KB |
Output is correct |
| 50 |
Correct |
23 ms |
5676 KB |
Output is correct |
| 51 |
Correct |
25 ms |
5624 KB |
Output is correct |
| 52 |
Correct |
14 ms |
2936 KB |
Output is correct |
| 53 |
Correct |
10 ms |
1884 KB |
Output is correct |
| 54 |
Correct |
19 ms |
4856 KB |
Output is correct |
| 55 |
Correct |
24 ms |
5624 KB |
Output is correct |
| 56 |
Correct |
18 ms |
5112 KB |
Output is correct |
| 57 |
Correct |
18 ms |
5116 KB |
Output is correct |
| 58 |
Correct |
19 ms |
5112 KB |
Output is correct |
| 59 |
Correct |
19 ms |
5240 KB |
Output is correct |
| 60 |
Correct |
19 ms |
5240 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
376 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
380 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
376 KB |
Output is correct |
| 10 |
Correct |
2 ms |
376 KB |
Output is correct |
| 11 |
Correct |
2 ms |
380 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
376 KB |
Output is correct |
| 14 |
Correct |
2 ms |
376 KB |
Output is correct |
| 15 |
Correct |
2 ms |
376 KB |
Output is correct |
| 16 |
Correct |
2 ms |
376 KB |
Output is correct |
| 17 |
Correct |
2 ms |
376 KB |
Output is correct |
| 18 |
Correct |
2 ms |
376 KB |
Output is correct |
| 19 |
Correct |
2 ms |
452 KB |
Output is correct |
| 20 |
Correct |
2 ms |
376 KB |
Output is correct |
| 21 |
Correct |
2 ms |
376 KB |
Output is correct |
| 22 |
Correct |
2 ms |
412 KB |
Output is correct |
| 23 |
Correct |
2 ms |
376 KB |
Output is correct |
| 24 |
Correct |
2 ms |
376 KB |
Output is correct |
| 25 |
Correct |
2 ms |
380 KB |
Output is correct |
| 26 |
Correct |
2 ms |
376 KB |
Output is correct |
| 27 |
Correct |
2 ms |
376 KB |
Output is correct |
| 28 |
Correct |
2 ms |
376 KB |
Output is correct |
| 29 |
Correct |
2 ms |
376 KB |
Output is correct |
| 30 |
Correct |
2 ms |
376 KB |
Output is correct |
| 31 |
Correct |
2 ms |
504 KB |
Output is correct |
| 32 |
Correct |
3 ms |
504 KB |
Output is correct |
| 33 |
Correct |
3 ms |
476 KB |
Output is correct |
| 34 |
Correct |
3 ms |
504 KB |
Output is correct |
| 35 |
Correct |
3 ms |
508 KB |
Output is correct |
| 36 |
Correct |
3 ms |
504 KB |
Output is correct |
| 37 |
Correct |
3 ms |
504 KB |
Output is correct |
| 38 |
Correct |
3 ms |
376 KB |
Output is correct |
| 39 |
Correct |
3 ms |
504 KB |
Output is correct |
| 40 |
Correct |
3 ms |
504 KB |
Output is correct |
| 41 |
Correct |
3 ms |
504 KB |
Output is correct |
| 42 |
Correct |
3 ms |
508 KB |
Output is correct |
| 43 |
Correct |
3 ms |
508 KB |
Output is correct |
| 44 |
Correct |
3 ms |
504 KB |
Output is correct |
| 45 |
Correct |
4 ms |
504 KB |
Output is correct |
| 46 |
Correct |
15 ms |
5112 KB |
Output is correct |
| 47 |
Correct |
21 ms |
5112 KB |
Output is correct |
| 48 |
Correct |
23 ms |
5496 KB |
Output is correct |
| 49 |
Correct |
23 ms |
5624 KB |
Output is correct |
| 50 |
Correct |
23 ms |
5676 KB |
Output is correct |
| 51 |
Correct |
25 ms |
5624 KB |
Output is correct |
| 52 |
Correct |
14 ms |
2936 KB |
Output is correct |
| 53 |
Correct |
10 ms |
1884 KB |
Output is correct |
| 54 |
Correct |
19 ms |
4856 KB |
Output is correct |
| 55 |
Correct |
24 ms |
5624 KB |
Output is correct |
| 56 |
Correct |
18 ms |
5112 KB |
Output is correct |
| 57 |
Correct |
18 ms |
5116 KB |
Output is correct |
| 58 |
Correct |
19 ms |
5112 KB |
Output is correct |
| 59 |
Correct |
19 ms |
5240 KB |
Output is correct |
| 60 |
Correct |
19 ms |
5240 KB |
Output is correct |
| 61 |
Correct |
68 ms |
23840 KB |
Output is correct |
| 62 |
Correct |
94 ms |
23836 KB |
Output is correct |
| 63 |
Correct |
100 ms |
24184 KB |
Output is correct |
| 64 |
Correct |
111 ms |
25792 KB |
Output is correct |
| 65 |
Correct |
115 ms |
25596 KB |
Output is correct |
| 66 |
Correct |
118 ms |
25592 KB |
Output is correct |
| 67 |
Correct |
98 ms |
21496 KB |
Output is correct |
| 68 |
Correct |
64 ms |
10888 KB |
Output is correct |
| 69 |
Correct |
85 ms |
23032 KB |
Output is correct |
| 70 |
Correct |
114 ms |
25720 KB |
Output is correct |
| 71 |
Correct |
82 ms |
23800 KB |
Output is correct |
| 72 |
Correct |
92 ms |
24184 KB |
Output is correct |
| 73 |
Correct |
106 ms |
24952 KB |
Output is correct |
| 74 |
Correct |
96 ms |
25208 KB |
Output is correct |
| 75 |
Correct |
96 ms |
25208 KB |
Output is correct |
