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답안 #202485

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
202485 2020-02-16T11:13:58 Z onjo0127 3단 점프 (JOI19_jumps) C++11
100 / 100
 1432 ms 89960 KB 
#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;

struct node { int v, f, a; } T[1050000];
const node EMP = {0, 0, 0};
node operator +(node L, node R) {
	node ret;
	ret.f = max(L.f, R.f);
	ret.a = max(L.a, R.a);
	ret.v = max({L.v, R.v, L.f + R.a});
	return ret;
}

int A[500009], ans[500009], F[500009];
vector<pii> query[500009];
vector<int> add[500009];

void init(int idx, int s, int e) {
	if(s == e) {
		T[idx] = {A[s], 0, A[s]};
		return;
	}
	int m = s+e >> 1;
	init(idx*2, s, m);
	init(idx*2+1, m+1, e);
	T[idx] = T[idx*2] + T[idx*2+1];
}

void upd(int idx, int s, int e, int p, int v) {
	if(p < s || e < p) return;
	if(s == e) {
		T[idx].f = v;
		T[idx].v = T[idx].f + T[idx].a;
		return;
	}
	int m = s+e >> 1;
	upd(idx*2, s, m, p, v);
	upd(idx*2+1, m+1, e, p, v);
	T[idx] = T[idx*2] + T[idx*2+1];
}

node get(int idx, int s, int e, int l, int r) {
	if(r < s || e < l) return EMP;
	if(l <= s && e <= r) return T[idx];
	int m = s+e >> 1;
	return get(idx*2, s, m, l, r) + get(idx*2+1, m+1, e, l, r);
}

int main() {
	int N; scanf("%d", &N);
	for(int i=1; i<=N; i++) scanf("%d", &A[i]);
	int Q; scanf("%d", &Q);
	for(int i=0; i<Q; i++) {
		int l, r; scanf("%d%d",&l,&r);
		query[l].push_back({r, i});
	}
	vector<int> S;
	for(int i=1; i<=N; i++) {
		while(S.size() && A[S.back()] < A[i]) {
			add[S.back()].push_back(i);
			S.pop_back();
		}
		if(S.size()) add[S.back()].push_back(i);
		S.push_back(i);
	}
	init(1, 1, N);
	for(int i=N; i>=1; i--) {
		for(auto& it: add[i]) if(2*it - i <= N) {
			F[2*it - i] = max(F[2*it - i], A[i] + A[it]);
			upd(1, 1, N, 2*it - i, F[2*it - i]);
		}
		for(auto& it: query[i]) ans[it.second] = get(1, 1, N, i, it.first).v;
	}
	for(int i=0; i<Q; i++) printf("%d\n", ans[i]);
	return 0;
}

Compilation message

jumps.cpp: In function 'void init(int, int, int)':
jumps.cpp:24:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int m = s+e >> 1;
          ~^~
jumps.cpp: In function 'void upd(int, int, int, int, int)':
jumps.cpp:37:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int m = s+e >> 1;
          ~^~
jumps.cpp: In function 'node get(int, int, int, int, int)':
jumps.cpp:46:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int m = s+e >> 1;
          ~^~
jumps.cpp: In function 'int main()':
jumps.cpp:51:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  int N; scanf("%d", &N);
         ~~~~~^~~~~~~~~~
jumps.cpp:52:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1; i<=N; i++) scanf("%d", &A[i]);
                          ~~~~~^~~~~~~~~~~~~
jumps.cpp:53:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  int Q; scanf("%d", &Q);
         ~~~~~^~~~~~~~~~
jumps.cpp:55:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int l, r; scanf("%d%d",&l,&r);
             ~~~~~^~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 21 ms 23800 KB Output is correct
2 Correct 20 ms 23800 KB Output is correct
3 Correct 22 ms 23800 KB Output is correct
4 Correct 20 ms 23804 KB Output is correct
5 Correct 21 ms 23800 KB Output is correct
6 Correct 21 ms 23800 KB Output is correct
7 Correct 21 ms 23800 KB Output is correct
8 Correct 20 ms 23800 KB Output is correct
9 Correct 20 ms 23800 KB Output is correct
10 Correct 20 ms 23800 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 21 ms 23800 KB Output is correct
2 Correct 20 ms 23800 KB Output is correct
3 Correct 22 ms 23800 KB Output is correct
4 Correct 20 ms 23804 KB Output is correct
5 Correct 21 ms 23800 KB Output is correct
6 Correct 21 ms 23800 KB Output is correct
7 Correct 21 ms 23800 KB Output is correct
8 Correct 20 ms 23800 KB Output is correct
9 Correct 20 ms 23800 KB Output is correct
10 Correct 20 ms 23800 KB Output is correct
11 Correct 452 ms 42100 KB Output is correct
12 Correct 442 ms 42104 KB Output is correct
13 Correct 445 ms 42276 KB Output is correct
14 Correct 442 ms 42108 KB Output is correct
15 Correct 443 ms 42232 KB Output is correct
16 Correct 450 ms 41592 KB Output is correct
17 Correct 437 ms 41464 KB Output is correct
18 Correct 452 ms 41360 KB Output is correct
19 Correct 441 ms 42232 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 232 ms 39800 KB Output is correct
2 Correct 143 ms 39544 KB Output is correct
3 Correct 140 ms 40284 KB Output is correct
4 Correct 233 ms 39800 KB Output is correct
5 Correct 236 ms 39720 KB Output is correct
6 Correct 220 ms 39160 KB Output is correct
7 Correct 221 ms 39032 KB Output is correct
8 Correct 220 ms 39080 KB Output is correct
9 Correct 228 ms 39408 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 21 ms 23800 KB Output is correct
2 Correct 20 ms 23800 KB Output is correct
3 Correct 22 ms 23800 KB Output is correct
4 Correct 20 ms 23804 KB Output is correct
5 Correct 21 ms 23800 KB Output is correct
6 Correct 21 ms 23800 KB Output is correct
7 Correct 21 ms 23800 KB Output is correct
8 Correct 20 ms 23800 KB Output is correct
9 Correct 20 ms 23800 KB Output is correct
10 Correct 20 ms 23800 KB Output is correct
11 Correct 452 ms 42100 KB Output is correct
12 Correct 442 ms 42104 KB Output is correct
13 Correct 445 ms 42276 KB Output is correct
14 Correct 442 ms 42108 KB Output is correct
15 Correct 443 ms 42232 KB Output is correct
16 Correct 450 ms 41592 KB Output is correct
17 Correct 437 ms 41464 KB Output is correct
18 Correct 452 ms 41360 KB Output is correct
19 Correct 441 ms 42232 KB Output is correct
20 Correct 232 ms 39800 KB Output is correct
21 Correct 143 ms 39544 KB Output is correct
22 Correct 140 ms 40284 KB Output is correct
23 Correct 233 ms 39800 KB Output is correct
24 Correct 236 ms 39720 KB Output is correct
25 Correct 220 ms 39160 KB Output is correct
26 Correct 221 ms 39032 KB Output is correct
27 Correct 220 ms 39080 KB Output is correct
28 Correct 228 ms 39408 KB Output is correct
29 Correct 1427 ms 84188 KB Output is correct
30 Correct 1169 ms 83704 KB Output is correct
31 Correct 1174 ms 85604 KB Output is correct
32 Correct 1432 ms 84024 KB Output is correct
33 Correct 1396 ms 84232 KB Output is correct
34 Correct 1392 ms 81860 KB Output is correct
35 Correct 1389 ms 81728 KB Output is correct
36 Correct 1390 ms 81784 KB Output is correct
37 Correct 1385 ms 83192 KB Output is correct
38 Correct 1096 ms 89960 KB Output is correct
39 Correct 1085 ms 89864 KB Output is correct
40 Correct 1061 ms 86648 KB Output is correct
41 Correct 1040 ms 86008 KB Output is correct
42 Correct 1068 ms 86012 KB Output is correct
43 Correct 1068 ms 87672 KB Output is correct
44 Correct 1128 ms 89336 KB Output is correct
45 Correct 1123 ms 89208 KB Output is correct
46 Correct 1101 ms 86264 KB Output is correct
47 Correct 1091 ms 85740 KB Output is correct
48 Correct 1106 ms 85660 KB Output is correct
49 Correct 1112 ms 87672 KB Output is correct
50 Correct 1207 ms 87032 KB Output is correct
51 Correct 1201 ms 87416 KB Output is correct
52 Correct 1191 ms 84856 KB Output is correct
53 Correct 1157 ms 84260 KB Output is correct
54 Correct 1177 ms 84348 KB Output is correct
55 Correct 1199 ms 85928 KB Output is correct