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답안 #20584

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
20584 2017-02-12T13:25:37 Z kdh9949 역사적 조사 (JOI14_historical) C++14
100 / 100
 2966 ms 6804 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

const int sz = 131072, b = 320;
int n, q, a[100010], xx[100010];
ll ans[100010];

struct Query{
	int s, e, idx;
	bool operator<(const Query &oth) const {
		return (s / b == oth.s / b) ? e < oth.e : s < oth.s;
	}
} qa[100010];

struct Seg{
	ll dat[2 * sz];
	void init(){
		for(int i = 1; i < 2 * sz; i++) dat[i] = 0;
	}
	void upd(int x, int v){
		x += sz - 1; dat[x] += v * xx[x - sz + 1];
		for(x /= 2; x; x /= 2) dat[x] = max(dat[2 * x], dat[2 * x + 1]);
	}
	ll get(){ return dat[1]; }
} S;

int main(){
	scanf("%d%d", &n, &q);
	for(int i = 1; i <= n; i++){ scanf("%d", a + i); xx[i] = a[i]; }
	sort(xx + 1, xx + n + 1);
	for(int i = 1; i <= n; i++) a[i] = (int)(lower_bound(xx + 1, xx + n + 1, a[i]) - xx);
    for(int i = 1; i <= q; i++){ scanf("%d%d", &qa[i].s, &qa[i].e); qa[i].idx = i; }
    sort(qa + 1, qa + q + 1);
    qa[0].s = 1; qa[0].e = 0;
    S.init();
    for(int i = 1; i <= q; i++){
		int ls = qa[i - 1].s, le = qa[i - 1].e;
		int cs = qa[i].s, ce = qa[i].e;
		for(; ls < cs; ) S.upd(a[ls++], -1);
		for(; ls > cs; ) S.upd(a[--ls], 1);
		for(; le < ce; ) S.upd(a[++le], 1);
		for(; le > ce; ) S.upd(a[le--], -1);
		ans[qa[i].idx] = S.get();
    }
    for(int i = 1; i <= q; i++) printf("%lld\n", ans[i]);
}

Compilation message

historic.cpp: In function 'int main()':
historic.cpp:29:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &q);
                       ^
historic.cpp:30:49: 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); xx[i] = a[i]; }
                                                 ^
historic.cpp:33:67: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i = 1; i <= q; i++){ scanf("%d%d", &qa[i].s, &qa[i].e); qa[i].idx = i; }
                                                                   ^

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 6804 KB Output is correct
2 Correct 0 ms 6804 KB Output is correct
3 Correct 0 ms 6804 KB Output is correct
4 Correct 0 ms 6804 KB Output is correct
5 Correct 0 ms 6804 KB Output is correct
6 Correct 0 ms 6804 KB Output is correct
7 Correct 0 ms 6804 KB Output is correct
8 Correct 0 ms 6804 KB Output is correct
9 Correct 0 ms 6804 KB Output is correct
10 Correct 0 ms 6804 KB Output is correct
11 Correct 0 ms 6804 KB Output is correct
12 Correct 0 ms 6804 KB Output is correct
13 Correct 0 ms 6804 KB Output is correct
14 Correct 0 ms 6804 KB Output is correct
15 Correct 0 ms 6804 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 6804 KB Output is correct
2 Correct 3 ms 6804 KB Output is correct
3 Correct 3 ms 6804 KB Output is correct
4 Correct 9 ms 6804 KB Output is correct
5 Correct 19 ms 6804 KB Output is correct
6 Correct 33 ms 6804 KB Output is correct
7 Correct 33 ms 6804 KB Output is correct
8 Correct 29 ms 6804 KB Output is correct
9 Correct 33 ms 6804 KB Output is correct
10 Correct 29 ms 6804 KB Output is correct
11 Correct 33 ms 6804 KB Output is correct
12 Correct 33 ms 6804 KB Output is correct
13 Correct 33 ms 6804 KB Output is correct
14 Correct 33 ms 6804 KB Output is correct
15 Correct 29 ms 6804 KB Output is correct
16 Correct 33 ms 6804 KB Output is correct
17 Correct 33 ms 6804 KB Output is correct
18 Correct 29 ms 6804 KB Output is correct
19 Correct 33 ms 6804 KB Output is correct
20 Correct 33 ms 6804 KB Output is correct

Subtask #3
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 6804 KB Output is correct
2 Correct 0 ms 6804 KB Output is correct
3 Correct 0 ms 6804 KB Output is correct
4 Correct 0 ms 6804 KB Output is correct
5 Correct 0 ms 6804 KB Output is correct
6 Correct 0 ms 6804 KB Output is correct
7 Correct 0 ms 6804 KB Output is correct
8 Correct 3 ms 6804 KB Output is correct
9 Correct 13 ms 6804 KB Output is correct
10 Correct 13 ms 6804 KB Output is correct
11 Correct 73 ms 6804 KB Output is correct
12 Correct 46 ms 6804 KB Output is correct
13 Correct 66 ms 6804 KB Output is correct
14 Correct 83 ms 6804 KB Output is correct
15 Correct 93 ms 6804 KB Output is correct
16 Correct 76 ms 6804 KB Output is correct
17 Correct 33 ms 6804 KB Output is correct
18 Correct 69 ms 6804 KB Output is correct
19 Correct 63 ms 6804 KB Output is correct
20 Correct 36 ms 6804 KB Output is correct

Subtask #4
60.0 / 60.0

# 결과 실행 시간 메모리 Grader output
1 Correct 73 ms 6804 KB Output is correct
2 Correct 196 ms 6804 KB Output is correct
3 Correct 369 ms 6804 KB Output is correct
4 Correct 583 ms 6804 KB Output is correct
5 Correct 856 ms 6804 KB Output is correct
6 Correct 1176 ms 6804 KB Output is correct
7 Correct 1296 ms 6804 KB Output is correct
8 Correct 1459 ms 6804 KB Output is correct
9 Correct 1736 ms 6804 KB Output is correct
10 Correct 2519 ms 6804 KB Output is correct
11 Correct 1969 ms 6804 KB Output is correct
12 Correct 2259 ms 6804 KB Output is correct
13 Correct 2789 ms 6804 KB Output is correct
14 Correct 2849 ms 6804 KB Output is correct
15 Correct 2966 ms 6804 KB Output is correct
16 Correct 2876 ms 6804 KB Output is correct
17 Correct 2773 ms 6804 KB Output is correct
18 Correct 2819 ms 6804 KB Output is correct
19 Correct 2759 ms 6804 KB Output is correct
20 Correct 2836 ms 6804 KB Output is correct
21 Correct 2866 ms 6804 KB Output is correct
22 Correct 2873 ms 6804 KB Output is correct
23 Correct 2869 ms 6804 KB Output is correct
24 Correct 2819 ms 6804 KB Output is correct
25 Correct 2473 ms 6804 KB Output is correct