#include <bits/stdc++.h>
using namespace std;
typedef long long lint;
typedef pair<lint, lint> pll;
#define fi first
#define se second
const int MAXN = 100010;
const int INF = 1 << 30;
lint X[MAXN];
void solve(vector<lint> &v, vector<pll> &r, vector<pll> &x) {
for(auto &a : v) {
pll t = pll(a, max(-a, 0ll));
while(!r.empty() && t.fi < 0) {
t.se = max(t.se, r.back().se - t.fi);
t.fi += r.back().fi;
r.pop_back();
}
(t.fi >= 0 ? r : x).push_back(t);
}
}
int main() {
ios::sync_with_stdio(0); cin.tie(0);
int N, K;
lint T;
cin >> N >> K >> T;
for(int i = 1; i <= N; i++) cin >> X[i];
lint s = 0, e = INF;
while(s < e) {
lint m = (s + e) / 2;
vector<lint> v1, v2;
for(int i = 1; i < K; i++) v1.push_back(2 * T * m - X[i + 1] + X[i]);
for(int i = N; i > K; i--) v2.push_back(2 * T * m - X[i] + X[i - 1]);
vector<pll> r1, r2, x1, x2;
solve(v1, r1, x1);
solve(v2, r2, x2);
/*
printf("m = %lld\nv1 : ", m);
for(auto a : v1) printf("%lld ", a);
printf("\nv2 : ");
for(auto a : v2) printf("%lld ", a);
printf("\nr1 : ");
for(auto a : r1) printf("(%lld, %lld) ", a.fi, a.se);
printf("\nr2 : ");
for(auto a : r2) printf("(%lld, %lld) ", a.fi, a.se);
printf("\n");
*/
lint t = 0;
int p1 = int(r1.size()) - 1, p2 = int(r2.size()) - 1;
while(p1 >= 0 || p2 >= 0) {
if(p1 >= 0 && t >= r1[p1].se) t += r1[p1--].fi;
else if(p2 >= 0 && t >= r2[p2].se) t += r2[p2--].fi;
else break;
}
if(p1 >= 0 || p2 >= 0) {
s = m + 1;
continue;
}
p1 = p2 = 0;
t = 0;
for(auto a : v1) t += a;
for(auto a : v2) t += a;
while(p1 < x1.size() || p2 < x2.size()) {
if(p1 < x1.size() && t - x1[p1].fi >= x1[p1].se) t -= x1[p1++].fi;
else if(p2 < x2.size() && t - x2[p2].fi >= x2[p2].se) t -= x2[p2++].fi;
else break;
}
if(p1 < x1.size() || p2 < x2.size()) s = m + 1;
else e = m;
}
cout << s << "\n";
return 0;
}
Compilation message
sparklers.cpp: In function 'int main()':
sparklers.cpp:70:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
while(p1 < x1.size() || p2 < x2.size()) {
~~~^~~~~~~~~~~
sparklers.cpp:70:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
while(p1 < x1.size() || p2 < x2.size()) {
~~~^~~~~~~~~~~
sparklers.cpp:71:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if(p1 < x1.size() && t - x1[p1].fi >= x1[p1].se) t -= x1[p1++].fi;
~~~^~~~~~~~~~~
sparklers.cpp:72:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
else if(p2 < x2.size() && t - x2[p2].fi >= x2[p2].se) t -= x2[p2++].fi;
~~~^~~~~~~~~~~
sparklers.cpp:75:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if(p1 < x1.size() || p2 < x2.size()) s = m + 1;
~~~^~~~~~~~~~~
sparklers.cpp:75:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if(p1 < x1.size() || p2 < x2.size()) s = m + 1;
~~~^~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
380 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 |
376 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 |
376 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
508 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 |
376 KB |
Output is correct |
| 20 |
Correct |
2 ms |
376 KB |
Output is correct |
| 21 |
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 |
380 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 |
376 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 |
376 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
508 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 |
376 KB |
Output is correct |
| 20 |
Correct |
2 ms |
376 KB |
Output is correct |
| 21 |
Correct |
2 ms |
376 KB |
Output is correct |
| 22 |
Correct |
3 ms |
376 KB |
Output is correct |
| 23 |
Correct |
3 ms |
376 KB |
Output is correct |
| 24 |
Correct |
3 ms |
376 KB |
Output is correct |
| 25 |
Correct |
3 ms |
376 KB |
Output is correct |
| 26 |
Correct |
3 ms |
376 KB |
Output is correct |
| 27 |
Correct |
3 ms |
376 KB |
Output is correct |
| 28 |
Correct |
3 ms |
376 KB |
Output is correct |
| 29 |
Correct |
3 ms |
376 KB |
Output is correct |
| 30 |
Correct |
3 ms |
376 KB |
Output is correct |
| 31 |
Correct |
3 ms |
376 KB |
Output is correct |
| 32 |
Correct |
3 ms |
376 KB |
Output is correct |
| 33 |
Correct |
3 ms |
376 KB |
Output is correct |
| 34 |
Correct |
3 ms |
376 KB |
Output is correct |
| 35 |
Correct |
3 ms |
376 KB |
Output is correct |
| 36 |
Correct |
3 ms |
376 KB |
Output is correct |
| 37 |
Correct |
3 ms |
376 KB |
Output is correct |
| 38 |
Correct |
3 ms |
376 KB |
Output is correct |
| 39 |
Correct |
3 ms |
376 KB |
Output is correct |
| 40 |
Correct |
3 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 |
380 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 |
376 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 |
376 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
508 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 |
376 KB |
Output is correct |
| 20 |
Correct |
2 ms |
376 KB |
Output is correct |
| 21 |
Correct |
2 ms |
376 KB |
Output is correct |
| 22 |
Correct |
3 ms |
376 KB |
Output is correct |
| 23 |
Correct |
3 ms |
376 KB |
Output is correct |
| 24 |
Correct |
3 ms |
376 KB |
Output is correct |
| 25 |
Correct |
3 ms |
376 KB |
Output is correct |
| 26 |
Correct |
3 ms |
376 KB |
Output is correct |
| 27 |
Correct |
3 ms |
376 KB |
Output is correct |
| 28 |
Correct |
3 ms |
376 KB |
Output is correct |
| 29 |
Correct |
3 ms |
376 KB |
Output is correct |
| 30 |
Correct |
3 ms |
376 KB |
Output is correct |
| 31 |
Correct |
3 ms |
376 KB |
Output is correct |
| 32 |
Correct |
3 ms |
376 KB |
Output is correct |
| 33 |
Correct |
3 ms |
376 KB |
Output is correct |
| 34 |
Correct |
3 ms |
376 KB |
Output is correct |
| 35 |
Correct |
3 ms |
376 KB |
Output is correct |
| 36 |
Correct |
3 ms |
376 KB |
Output is correct |
| 37 |
Correct |
3 ms |
376 KB |
Output is correct |
| 38 |
Correct |
3 ms |
376 KB |
Output is correct |
| 39 |
Correct |
3 ms |
376 KB |
Output is correct |
| 40 |
Correct |
3 ms |
376 KB |
Output is correct |
| 41 |
Correct |
84 ms |
4188 KB |
Output is correct |
| 42 |
Correct |
4 ms |
564 KB |
Output is correct |
| 43 |
Correct |
21 ms |
1336 KB |
Output is correct |
| 44 |
Correct |
118 ms |
6900 KB |
Output is correct |
| 45 |
Correct |
97 ms |
5596 KB |
Output is correct |
| 46 |
Correct |
116 ms |
6776 KB |
Output is correct |
| 47 |
Correct |
114 ms |
6512 KB |
Output is correct |
| 48 |
Correct |
97 ms |
5508 KB |
Output is correct |
| 49 |
Correct |
124 ms |
7028 KB |
Output is correct |
| 50 |
Correct |
98 ms |
5548 KB |
Output is correct |
| 51 |
Correct |
117 ms |
6812 KB |
Output is correct |
| 52 |
Correct |
118 ms |
6576 KB |
Output is correct |
| 53 |
Correct |
120 ms |
7024 KB |
Output is correct |
| 54 |
Correct |
118 ms |
6492 KB |
Output is correct |
| 55 |
Correct |
97 ms |
5540 KB |
Output is correct |
| 56 |
Correct |
120 ms |
7004 KB |
Output is correct |
| 57 |
Correct |
119 ms |
6832 KB |
Output is correct |
| 58 |
Correct |
108 ms |
5540 KB |
Output is correct |
| 59 |
Correct |
102 ms |
4756 KB |
Output is correct |
| 60 |
Correct |
111 ms |
6580 KB |
Output is correct |
| 61 |
Correct |
112 ms |
6292 KB |
Output is correct |
| 62 |
Correct |
109 ms |
6848 KB |
Output is correct |
| 63 |
Correct |
105 ms |
6484 KB |
Output is correct |
| 64 |
Correct |
90 ms |
5512 KB |
Output is correct |
| 65 |
Correct |
88 ms |
5548 KB |
Output is correct |
| 66 |
Correct |
91 ms |
5484 KB |
Output is correct |
| 67 |
Correct |
89 ms |
5596 KB |
Output is correct |
| 68 |
Correct |
107 ms |
6616 KB |
Output is correct |
| 69 |
Correct |
111 ms |
6568 KB |
Output is correct |
