#include<stdio.h>
#include<vector>
#include<algorithm>
using namespace std;
#define MAXN 200005
const int INF = 1 << 30;
int N, Q;
int H[MAXN], A[MAXN], B[MAXN], L[MAXN], R[MAXN];
int ans[MAXN];
int minc[4*MAXN], maxd[4*MAXN], lazy[4*MAXN];
vector<int> query[MAXN], on[2*MAXN], off[2*MAXN];
void spreadlazy(int idx) {
lazy[idx * 2] = max(lazy[idx * 2], lazy[idx]);
lazy[idx * 2 + 1] = max(lazy[idx * 2 + 1], lazy[idx]);
maxd[idx * 2] = max(maxd[idx * 2], lazy[idx * 2] - minc[idx * 2]);
maxd[idx * 2 + 1] = max(maxd[idx * 2 + 1], lazy[idx * 2 + 1] - minc[idx * 2 + 1]);
lazy[idx] = -1;
}
void updc(int idx, int l, int r, int x, int c) {
if(l == r) {
minc[idx] = c;
lazy[idx] = -1;
return;
}
spreadlazy(idx);
int m = (l + r) / 2;
if(x <= m) updc(idx * 2, l, m, x, c);
else updc(idx * 2 + 1, m + 1, r, x, c);
minc[idx] = min(minc[idx * 2], minc[idx * 2 + 1]);
maxd[idx] = max(maxd[idx * 2], maxd[idx * 2 + 1]);
}
void updlazy(int idx, int l, int r, int x, int y, int z) {
if(x <= l && r <= y) {
lazy[idx] = max(lazy[idx], z);
maxd[idx] = max(maxd[idx], lazy[idx] - minc[idx]);
return;
}
if(r < x || y < l) return;
spreadlazy(idx);
int m = (l + r) / 2;
updlazy(idx * 2, l, m, x, y, z);
updlazy(idx * 2 + 1, m + 1, r, x, y, z);
maxd[idx] = max(maxd[idx * 2], maxd[idx * 2 + 1]);
}
int gmaxd(int idx, int l, int r, int x, int y) {
if(x <= l && r <= y) return maxd[idx];
if(r < x || y < l) return -1;
int m = (l + r) / 2;
spreadlazy(idx);
return max(gmaxd(idx * 2, l, m, x, y), gmaxd(idx * 2 + 1, m + 1, r, x, y));
}
void solve() {
for(int i = 0; i < N; i++) {
query[i].clear();
on[i].clear();
off[i].clear();
}
for(int i = 0; i < Q; i++) query[R[i]].push_back(i);
for(int i = 0; i < N; i++) {
on[i + A[i]].push_back(i);
off[i + B[i]].push_back(i);
}
for(int i = 1; i < 4 * N; i++) {
minc[i] = INF;
maxd[i] = lazy[i] = -1;
}
for(int i = 0; i < N; i++) {
for(auto a : on[i]) updc(1, 0, N-1, a, H[a]);
updlazy(1, 0, N-1, i - B[i], i - A[i], H[i]);
for(auto a : query[i]) ans[a] = max(ans[a], gmaxd(1, 0, N-1, L[a], i));
for(auto a : off[i]) updc(1, 0, N-1, a, INF);
}
}
int main() {
scanf("%d", &N);
for(int i = 0; i < N; i++) scanf("%d%d%d", H+i, A+i, B+i);
scanf("%d", &Q);
for(int i = 0; i < Q; i++) scanf("%d%d", L+i, R+i);
for(int i = 0; i < Q; i++) {
ans[i] = -1;
L[i]--;
R[i]--;
}
solve();
for(int i = 0; i < N/2; i++){
swap(H[i], H[N - i - 1]);
swap(A[i], A[N - i - 1]);
swap(B[i], B[N - i - 1]);
}
for(int i = 0; i < Q; i++) {
swap(L[i], R[i]);
L[i] = N - L[i] - 1;
R[i] = N - R[i] - 1;
}
solve();
for(int i = 0; i < Q; i++) printf("%d\n", ans[i]);
return 0;
}
Compilation message
antennas.cpp: In function 'int main()':
antennas.cpp:86:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
86 | scanf("%d", &N);
| ~~~~~^~~~~~~~~~
antennas.cpp:87:34: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
87 | for(int i = 0; i < N; i++) scanf("%d%d%d", H+i, A+i, B+i);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
antennas.cpp:88:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
88 | scanf("%d", &Q);
| ~~~~~^~~~~~~~~~
antennas.cpp:89:34: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
89 | for(int i = 0; i < Q; i++) scanf("%d%d", L+i, R+i);
| ~~~~~^~~~~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
12 ms |
23772 KB |
Output is correct |
2 |
Correct |
12 ms |
23760 KB |
Output is correct |
3 |
Correct |
12 ms |
23764 KB |
Output is correct |
4 |
Correct |
11 ms |
23752 KB |
Output is correct |
5 |
Correct |
12 ms |
23760 KB |
Output is correct |
6 |
Correct |
13 ms |
23852 KB |
Output is correct |
7 |
Correct |
12 ms |
23764 KB |
Output is correct |
8 |
Correct |
12 ms |
23988 KB |
Output is correct |
9 |
Correct |
13 ms |
23748 KB |
Output is correct |
10 |
Correct |
12 ms |
23764 KB |
Output is correct |
11 |
Correct |
12 ms |
23756 KB |
Output is correct |
12 |
Correct |
11 ms |
23764 KB |
Output is correct |
13 |
Correct |
12 ms |
23764 KB |
Output is correct |
14 |
Correct |
13 ms |
23884 KB |
Output is correct |
15 |
Correct |
14 ms |
23756 KB |
Output is correct |
16 |
Correct |
11 ms |
23756 KB |
Output is correct |
17 |
Correct |
11 ms |
23800 KB |
Output is correct |
18 |
Correct |
12 ms |
23768 KB |
Output is correct |
19 |
Correct |
12 ms |
23756 KB |
Output is correct |
20 |
Correct |
12 ms |
23772 KB |
Output is correct |
21 |
Correct |
11 ms |
23756 KB |
Output is correct |
22 |
Correct |
12 ms |
23820 KB |
Output is correct |
23 |
Correct |
12 ms |
23764 KB |
Output is correct |
24 |
Correct |
12 ms |
23756 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
12 ms |
23772 KB |
Output is correct |
2 |
Correct |
12 ms |
23760 KB |
Output is correct |
3 |
Correct |
12 ms |
23764 KB |
Output is correct |
4 |
Correct |
11 ms |
23752 KB |
Output is correct |
5 |
Correct |
12 ms |
23760 KB |
Output is correct |
6 |
Correct |
13 ms |
23852 KB |
Output is correct |
7 |
Correct |
12 ms |
23764 KB |
Output is correct |
8 |
Correct |
12 ms |
23988 KB |
Output is correct |
9 |
Correct |
13 ms |
23748 KB |
Output is correct |
10 |
Correct |
12 ms |
23764 KB |
Output is correct |
11 |
Correct |
12 ms |
23756 KB |
Output is correct |
12 |
Correct |
11 ms |
23764 KB |
Output is correct |
13 |
Correct |
12 ms |
23764 KB |
Output is correct |
14 |
Correct |
13 ms |
23884 KB |
Output is correct |
15 |
Correct |
14 ms |
23756 KB |
Output is correct |
16 |
Correct |
11 ms |
23756 KB |
Output is correct |
17 |
Correct |
11 ms |
23800 KB |
Output is correct |
18 |
Correct |
12 ms |
23768 KB |
Output is correct |
19 |
Correct |
12 ms |
23756 KB |
Output is correct |
20 |
Correct |
12 ms |
23772 KB |
Output is correct |
21 |
Correct |
11 ms |
23756 KB |
Output is correct |
22 |
Correct |
12 ms |
23820 KB |
Output is correct |
23 |
Correct |
12 ms |
23764 KB |
Output is correct |
24 |
Correct |
12 ms |
23756 KB |
Output is correct |
25 |
Correct |
121 ms |
29240 KB |
Output is correct |
26 |
Correct |
27 ms |
24672 KB |
Output is correct |
27 |
Correct |
171 ms |
31456 KB |
Output is correct |
28 |
Correct |
154 ms |
31584 KB |
Output is correct |
29 |
Correct |
114 ms |
29368 KB |
Output is correct |
30 |
Correct |
111 ms |
29160 KB |
Output is correct |
31 |
Correct |
118 ms |
30688 KB |
Output is correct |
32 |
Correct |
153 ms |
31520 KB |
Output is correct |
33 |
Correct |
176 ms |
31056 KB |
Output is correct |
34 |
Correct |
84 ms |
27588 KB |
Output is correct |
35 |
Correct |
184 ms |
31552 KB |
Output is correct |
36 |
Correct |
172 ms |
31480 KB |
Output is correct |
37 |
Correct |
99 ms |
27784 KB |
Output is correct |
38 |
Correct |
184 ms |
30556 KB |
Output is correct |
39 |
Correct |
35 ms |
24860 KB |
Output is correct |
40 |
Correct |
190 ms |
30540 KB |
Output is correct |
41 |
Correct |
124 ms |
28944 KB |
Output is correct |
42 |
Correct |
168 ms |
30508 KB |
Output is correct |
43 |
Correct |
84 ms |
26148 KB |
Output is correct |
44 |
Correct |
157 ms |
30472 KB |
Output is correct |
45 |
Correct |
40 ms |
25180 KB |
Output is correct |
46 |
Correct |
164 ms |
30524 KB |
Output is correct |
47 |
Correct |
51 ms |
25660 KB |
Output is correct |
48 |
Correct |
160 ms |
30652 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
348 ms |
50756 KB |
Output is correct |
2 |
Correct |
413 ms |
53920 KB |
Output is correct |
3 |
Correct |
259 ms |
45000 KB |
Output is correct |
4 |
Correct |
392 ms |
53964 KB |
Output is correct |
5 |
Correct |
171 ms |
37556 KB |
Output is correct |
6 |
Correct |
394 ms |
53912 KB |
Output is correct |
7 |
Correct |
342 ms |
49876 KB |
Output is correct |
8 |
Correct |
392 ms |
53900 KB |
Output is correct |
9 |
Correct |
53 ms |
28528 KB |
Output is correct |
10 |
Correct |
424 ms |
53912 KB |
Output is correct |
11 |
Correct |
250 ms |
42592 KB |
Output is correct |
12 |
Correct |
415 ms |
53908 KB |
Output is correct |
13 |
Correct |
249 ms |
49184 KB |
Output is correct |
14 |
Correct |
252 ms |
48728 KB |
Output is correct |
15 |
Correct |
238 ms |
48480 KB |
Output is correct |
16 |
Correct |
237 ms |
49156 KB |
Output is correct |
17 |
Correct |
272 ms |
49520 KB |
Output is correct |
18 |
Correct |
246 ms |
48416 KB |
Output is correct |
19 |
Correct |
245 ms |
48520 KB |
Output is correct |
20 |
Correct |
242 ms |
48800 KB |
Output is correct |
21 |
Correct |
244 ms |
49736 KB |
Output is correct |
22 |
Correct |
242 ms |
48980 KB |
Output is correct |
23 |
Correct |
244 ms |
48844 KB |
Output is correct |
24 |
Correct |
229 ms |
48404 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
12 ms |
23772 KB |
Output is correct |
2 |
Correct |
12 ms |
23760 KB |
Output is correct |
3 |
Correct |
12 ms |
23764 KB |
Output is correct |
4 |
Correct |
11 ms |
23752 KB |
Output is correct |
5 |
Correct |
12 ms |
23760 KB |
Output is correct |
6 |
Correct |
13 ms |
23852 KB |
Output is correct |
7 |
Correct |
12 ms |
23764 KB |
Output is correct |
8 |
Correct |
12 ms |
23988 KB |
Output is correct |
9 |
Correct |
13 ms |
23748 KB |
Output is correct |
10 |
Correct |
12 ms |
23764 KB |
Output is correct |
11 |
Correct |
12 ms |
23756 KB |
Output is correct |
12 |
Correct |
11 ms |
23764 KB |
Output is correct |
13 |
Correct |
12 ms |
23764 KB |
Output is correct |
14 |
Correct |
13 ms |
23884 KB |
Output is correct |
15 |
Correct |
14 ms |
23756 KB |
Output is correct |
16 |
Correct |
11 ms |
23756 KB |
Output is correct |
17 |
Correct |
11 ms |
23800 KB |
Output is correct |
18 |
Correct |
12 ms |
23768 KB |
Output is correct |
19 |
Correct |
12 ms |
23756 KB |
Output is correct |
20 |
Correct |
12 ms |
23772 KB |
Output is correct |
21 |
Correct |
11 ms |
23756 KB |
Output is correct |
22 |
Correct |
12 ms |
23820 KB |
Output is correct |
23 |
Correct |
12 ms |
23764 KB |
Output is correct |
24 |
Correct |
12 ms |
23756 KB |
Output is correct |
25 |
Correct |
121 ms |
29240 KB |
Output is correct |
26 |
Correct |
27 ms |
24672 KB |
Output is correct |
27 |
Correct |
171 ms |
31456 KB |
Output is correct |
28 |
Correct |
154 ms |
31584 KB |
Output is correct |
29 |
Correct |
114 ms |
29368 KB |
Output is correct |
30 |
Correct |
111 ms |
29160 KB |
Output is correct |
31 |
Correct |
118 ms |
30688 KB |
Output is correct |
32 |
Correct |
153 ms |
31520 KB |
Output is correct |
33 |
Correct |
176 ms |
31056 KB |
Output is correct |
34 |
Correct |
84 ms |
27588 KB |
Output is correct |
35 |
Correct |
184 ms |
31552 KB |
Output is correct |
36 |
Correct |
172 ms |
31480 KB |
Output is correct |
37 |
Correct |
99 ms |
27784 KB |
Output is correct |
38 |
Correct |
184 ms |
30556 KB |
Output is correct |
39 |
Correct |
35 ms |
24860 KB |
Output is correct |
40 |
Correct |
190 ms |
30540 KB |
Output is correct |
41 |
Correct |
124 ms |
28944 KB |
Output is correct |
42 |
Correct |
168 ms |
30508 KB |
Output is correct |
43 |
Correct |
84 ms |
26148 KB |
Output is correct |
44 |
Correct |
157 ms |
30472 KB |
Output is correct |
45 |
Correct |
40 ms |
25180 KB |
Output is correct |
46 |
Correct |
164 ms |
30524 KB |
Output is correct |
47 |
Correct |
51 ms |
25660 KB |
Output is correct |
48 |
Correct |
160 ms |
30652 KB |
Output is correct |
49 |
Correct |
348 ms |
50756 KB |
Output is correct |
50 |
Correct |
413 ms |
53920 KB |
Output is correct |
51 |
Correct |
259 ms |
45000 KB |
Output is correct |
52 |
Correct |
392 ms |
53964 KB |
Output is correct |
53 |
Correct |
171 ms |
37556 KB |
Output is correct |
54 |
Correct |
394 ms |
53912 KB |
Output is correct |
55 |
Correct |
342 ms |
49876 KB |
Output is correct |
56 |
Correct |
392 ms |
53900 KB |
Output is correct |
57 |
Correct |
53 ms |
28528 KB |
Output is correct |
58 |
Correct |
424 ms |
53912 KB |
Output is correct |
59 |
Correct |
250 ms |
42592 KB |
Output is correct |
60 |
Correct |
415 ms |
53908 KB |
Output is correct |
61 |
Correct |
249 ms |
49184 KB |
Output is correct |
62 |
Correct |
252 ms |
48728 KB |
Output is correct |
63 |
Correct |
238 ms |
48480 KB |
Output is correct |
64 |
Correct |
237 ms |
49156 KB |
Output is correct |
65 |
Correct |
272 ms |
49520 KB |
Output is correct |
66 |
Correct |
246 ms |
48416 KB |
Output is correct |
67 |
Correct |
245 ms |
48520 KB |
Output is correct |
68 |
Correct |
242 ms |
48800 KB |
Output is correct |
69 |
Correct |
244 ms |
49736 KB |
Output is correct |
70 |
Correct |
242 ms |
48980 KB |
Output is correct |
71 |
Correct |
244 ms |
48844 KB |
Output is correct |
72 |
Correct |
229 ms |
48404 KB |
Output is correct |
73 |
Correct |
574 ms |
60340 KB |
Output is correct |
74 |
Correct |
409 ms |
55268 KB |
Output is correct |
75 |
Correct |
551 ms |
55780 KB |
Output is correct |
76 |
Correct |
699 ms |
66000 KB |
Output is correct |
77 |
Correct |
352 ms |
45380 KB |
Output is correct |
78 |
Correct |
610 ms |
62856 KB |
Output is correct |
79 |
Correct |
630 ms |
61596 KB |
Output is correct |
80 |
Correct |
757 ms |
65988 KB |
Output is correct |
81 |
Correct |
253 ms |
36816 KB |
Output is correct |
82 |
Correct |
531 ms |
60912 KB |
Output is correct |
83 |
Correct |
485 ms |
53312 KB |
Output is correct |
84 |
Correct |
703 ms |
66076 KB |
Output is correct |
85 |
Correct |
425 ms |
56448 KB |
Output is correct |
86 |
Correct |
524 ms |
59504 KB |
Output is correct |
87 |
Correct |
280 ms |
50624 KB |
Output is correct |
88 |
Correct |
518 ms |
60216 KB |
Output is correct |
89 |
Correct |
473 ms |
58236 KB |
Output is correct |
90 |
Correct |
557 ms |
59404 KB |
Output is correct |
91 |
Correct |
347 ms |
53308 KB |
Output is correct |
92 |
Correct |
537 ms |
59856 KB |
Output is correct |
93 |
Correct |
291 ms |
52372 KB |
Output is correct |
94 |
Correct |
555 ms |
59964 KB |
Output is correct |
95 |
Correct |
320 ms |
52608 KB |
Output is correct |
96 |
Correct |
527 ms |
59372 KB |
Output is correct |