#include <bits/stdc++.h>
using namespace std;
#define iii tuple<int, int, int>
const int N = 30500;
const int block = 200;
int n, m, b[N], v[N], dp[N][block + 7], ans = -1;
vector<int> pw[N];
vector<pair<int, int>> Q[N * block];
int32_t main (){
ios::sync_with_stdio(false); cin.tie(nullptr);
if (fopen("test.inp", "r")){
freopen("test.inp", "r", stdin);
freopen("test.out", "w", stdout);
}
cin >> n >> m;
for (int i = 0; i < n; ++i)
for (int j = 0; j <= block + 1; ++j)
dp[i][j] = -1;
for (int i = 1; i <= m; ++i){
cin >> b[i] >> v[i];
pw[b[i]].push_back(v[i]);
if (i == 1)
Q[0].push_back({b[i], v[i]});
}
for (int D = 0; D < N * block; ++D){
for (pair<int, int> it : Q[D]){
int u = it.first;
int t = it.second; t = min(t, block + 1);
if (dp[u][t] != -1)
continue;
dp[u][t] = D;
if (u == b[2])
ans = min((ans == -1 ? (int)1e16 : ans), D);
if (t <= block){
if (u - t >= 0 && dp[u - t][t] == -1)
Q[D + 1].push_back({u - t, t});
if (u + t < n && dp[u + t][t] == -1)
Q[D + 1].push_back({u + t, t});
}
for (int X : pw[u]){
if (X <= block){
if (u - X >= 0 && dp[u - X][X] == -1)
Q[D + 1].push_back({u - X, X});
if (u + X < n && dp[u + X][X] == -1)
Q[D + 1].push_back({u + X, X});
} else {
for (int i = u - X; i >= 0; i -= X)
if (dp[i][block + 1] == -1)
Q[D + (u - i) / X].push_back({i, X});
for (int i = u + X; i < n; i += X)
if (dp[i][block + 1] == -1)
Q[D + (i - u) / X].push_back({i, X});
}
}
}
}
cout << ans << "\n";
}
Compilation message
skyscraper.cpp: In function 'int32_t main()':
skyscraper.cpp:16:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
16 | freopen("test.inp", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
skyscraper.cpp:17:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
17 | freopen("test.out", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
61 ms |
146256 KB |
Output is correct |
2 |
Correct |
66 ms |
146248 KB |
Output is correct |
3 |
Correct |
71 ms |
146196 KB |
Output is correct |
4 |
Correct |
73 ms |
146248 KB |
Output is correct |
5 |
Correct |
71 ms |
146244 KB |
Output is correct |
6 |
Correct |
82 ms |
146260 KB |
Output is correct |
7 |
Correct |
81 ms |
146248 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
67 ms |
146248 KB |
Output is correct |
2 |
Correct |
68 ms |
146248 KB |
Output is correct |
3 |
Correct |
75 ms |
146116 KB |
Output is correct |
4 |
Correct |
69 ms |
146248 KB |
Output is correct |
5 |
Correct |
69 ms |
146208 KB |
Output is correct |
6 |
Correct |
69 ms |
146084 KB |
Output is correct |
7 |
Correct |
67 ms |
146260 KB |
Output is correct |
8 |
Correct |
67 ms |
146248 KB |
Output is correct |
9 |
Correct |
81 ms |
146296 KB |
Output is correct |
10 |
Correct |
79 ms |
146248 KB |
Output is correct |
11 |
Correct |
85 ms |
146504 KB |
Output is correct |
12 |
Correct |
67 ms |
146344 KB |
Output is correct |
13 |
Correct |
75 ms |
146224 KB |
Output is correct |
14 |
Correct |
75 ms |
146504 KB |
Output is correct |
15 |
Correct |
77 ms |
146608 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
69 ms |
146248 KB |
Output is correct |
2 |
Correct |
86 ms |
146248 KB |
Output is correct |
3 |
Correct |
88 ms |
146248 KB |
Output is correct |
4 |
Correct |
79 ms |
146176 KB |
Output is correct |
5 |
Correct |
74 ms |
146316 KB |
Output is correct |
6 |
Correct |
70 ms |
146248 KB |
Output is correct |
7 |
Correct |
73 ms |
146156 KB |
Output is correct |
8 |
Correct |
74 ms |
146296 KB |
Output is correct |
9 |
Correct |
69 ms |
146144 KB |
Output is correct |
10 |
Correct |
69 ms |
146300 KB |
Output is correct |
11 |
Correct |
73 ms |
146508 KB |
Output is correct |
12 |
Correct |
100 ms |
146352 KB |
Output is correct |
13 |
Correct |
94 ms |
146248 KB |
Output is correct |
14 |
Correct |
79 ms |
146412 KB |
Output is correct |
15 |
Correct |
85 ms |
146544 KB |
Output is correct |
16 |
Correct |
74 ms |
146248 KB |
Output is correct |
17 |
Correct |
85 ms |
146508 KB |
Output is correct |
18 |
Correct |
80 ms |
146248 KB |
Output is correct |
19 |
Correct |
82 ms |
146156 KB |
Output is correct |
20 |
Correct |
80 ms |
146248 KB |
Output is correct |
21 |
Correct |
81 ms |
146248 KB |
Output is correct |
22 |
Correct |
73 ms |
146260 KB |
Output is correct |
23 |
Correct |
83 ms |
146504 KB |
Output is correct |
24 |
Correct |
77 ms |
146504 KB |
Output is correct |
25 |
Correct |
78 ms |
146252 KB |
Output is correct |
26 |
Correct |
82 ms |
146504 KB |
Output is correct |
27 |
Correct |
86 ms |
146548 KB |
Output is correct |
28 |
Correct |
82 ms |
146764 KB |
Output is correct |
29 |
Correct |
96 ms |
147028 KB |
Output is correct |
30 |
Correct |
81 ms |
146396 KB |
Output is correct |
31 |
Correct |
80 ms |
146760 KB |
Output is correct |
32 |
Correct |
79 ms |
146504 KB |
Output is correct |
33 |
Correct |
75 ms |
147532 KB |
Output is correct |
34 |
Correct |
71 ms |
147528 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
75 ms |
146252 KB |
Output is correct |
2 |
Correct |
78 ms |
146092 KB |
Output is correct |
3 |
Correct |
68 ms |
146248 KB |
Output is correct |
4 |
Correct |
69 ms |
146248 KB |
Output is correct |
5 |
Correct |
86 ms |
146316 KB |
Output is correct |
6 |
Correct |
68 ms |
146256 KB |
Output is correct |
7 |
Correct |
77 ms |
146248 KB |
Output is correct |
8 |
Correct |
72 ms |
146248 KB |
Output is correct |
9 |
Correct |
73 ms |
146096 KB |
Output is correct |
10 |
Correct |
70 ms |
146248 KB |
Output is correct |
11 |
Correct |
76 ms |
146396 KB |
Output is correct |
12 |
Correct |
78 ms |
146248 KB |
Output is correct |
13 |
Correct |
72 ms |
146248 KB |
Output is correct |
14 |
Correct |
81 ms |
146504 KB |
Output is correct |
15 |
Correct |
80 ms |
146512 KB |
Output is correct |
16 |
Correct |
77 ms |
146248 KB |
Output is correct |
17 |
Correct |
71 ms |
146448 KB |
Output is correct |
18 |
Correct |
70 ms |
146256 KB |
Output is correct |
19 |
Correct |
72 ms |
146248 KB |
Output is correct |
20 |
Correct |
68 ms |
146248 KB |
Output is correct |
21 |
Correct |
69 ms |
146248 KB |
Output is correct |
22 |
Correct |
76 ms |
146284 KB |
Output is correct |
23 |
Correct |
84 ms |
146276 KB |
Output is correct |
24 |
Correct |
81 ms |
146264 KB |
Output is correct |
25 |
Correct |
92 ms |
146328 KB |
Output is correct |
26 |
Correct |
86 ms |
146380 KB |
Output is correct |
27 |
Correct |
85 ms |
146544 KB |
Output is correct |
28 |
Correct |
85 ms |
146760 KB |
Output is correct |
29 |
Correct |
87 ms |
147016 KB |
Output is correct |
30 |
Correct |
78 ms |
146500 KB |
Output is correct |
31 |
Correct |
85 ms |
146676 KB |
Output is correct |
32 |
Correct |
78 ms |
146504 KB |
Output is correct |
33 |
Correct |
79 ms |
147528 KB |
Output is correct |
34 |
Correct |
74 ms |
147532 KB |
Output is correct |
35 |
Correct |
104 ms |
147396 KB |
Output is correct |
36 |
Correct |
84 ms |
146488 KB |
Output is correct |
37 |
Correct |
92 ms |
148244 KB |
Output is correct |
38 |
Correct |
99 ms |
147908 KB |
Output is correct |
39 |
Correct |
93 ms |
148020 KB |
Output is correct |
40 |
Correct |
93 ms |
147964 KB |
Output is correct |
41 |
Correct |
117 ms |
147764 KB |
Output is correct |
42 |
Correct |
77 ms |
147148 KB |
Output is correct |
43 |
Correct |
75 ms |
147396 KB |
Output is correct |
44 |
Correct |
73 ms |
147192 KB |
Output is correct |
45 |
Correct |
330 ms |
247272 KB |
Output is correct |
46 |
Correct |
307 ms |
247100 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
62 ms |
146248 KB |
Output is correct |
2 |
Correct |
71 ms |
146256 KB |
Output is correct |
3 |
Correct |
63 ms |
146248 KB |
Output is correct |
4 |
Correct |
59 ms |
146292 KB |
Output is correct |
5 |
Correct |
61 ms |
146256 KB |
Output is correct |
6 |
Correct |
63 ms |
146252 KB |
Output is correct |
7 |
Correct |
68 ms |
146216 KB |
Output is correct |
8 |
Correct |
74 ms |
146256 KB |
Output is correct |
9 |
Correct |
81 ms |
146256 KB |
Output is correct |
10 |
Correct |
73 ms |
146248 KB |
Output is correct |
11 |
Correct |
76 ms |
146504 KB |
Output is correct |
12 |
Correct |
84 ms |
146300 KB |
Output is correct |
13 |
Correct |
69 ms |
146248 KB |
Output is correct |
14 |
Correct |
75 ms |
146600 KB |
Output is correct |
15 |
Correct |
75 ms |
146504 KB |
Output is correct |
16 |
Correct |
78 ms |
146124 KB |
Output is correct |
17 |
Correct |
75 ms |
146496 KB |
Output is correct |
18 |
Correct |
76 ms |
146180 KB |
Output is correct |
19 |
Correct |
86 ms |
146252 KB |
Output is correct |
20 |
Correct |
85 ms |
146256 KB |
Output is correct |
21 |
Correct |
63 ms |
146132 KB |
Output is correct |
22 |
Correct |
77 ms |
146244 KB |
Output is correct |
23 |
Correct |
91 ms |
146248 KB |
Output is correct |
24 |
Correct |
84 ms |
146388 KB |
Output is correct |
25 |
Correct |
69 ms |
146248 KB |
Output is correct |
26 |
Correct |
75 ms |
146508 KB |
Output is correct |
27 |
Correct |
75 ms |
146336 KB |
Output is correct |
28 |
Correct |
79 ms |
146924 KB |
Output is correct |
29 |
Correct |
69 ms |
146988 KB |
Output is correct |
30 |
Correct |
68 ms |
146424 KB |
Output is correct |
31 |
Correct |
75 ms |
146560 KB |
Output is correct |
32 |
Correct |
69 ms |
146468 KB |
Output is correct |
33 |
Correct |
74 ms |
147528 KB |
Output is correct |
34 |
Correct |
79 ms |
147376 KB |
Output is correct |
35 |
Correct |
96 ms |
147472 KB |
Output is correct |
36 |
Correct |
95 ms |
146504 KB |
Output is correct |
37 |
Correct |
107 ms |
148140 KB |
Output is correct |
38 |
Correct |
101 ms |
147908 KB |
Output is correct |
39 |
Correct |
94 ms |
148020 KB |
Output is correct |
40 |
Correct |
97 ms |
147988 KB |
Output is correct |
41 |
Correct |
92 ms |
147896 KB |
Output is correct |
42 |
Correct |
87 ms |
147140 KB |
Output is correct |
43 |
Correct |
93 ms |
147396 KB |
Output is correct |
44 |
Correct |
80 ms |
147140 KB |
Output is correct |
45 |
Correct |
311 ms |
248408 KB |
Output is correct |
46 |
Correct |
321 ms |
246912 KB |
Output is correct |
47 |
Correct |
141 ms |
160728 KB |
Output is correct |
48 |
Correct |
93 ms |
163916 KB |
Output is correct |
49 |
Correct |
78 ms |
165448 KB |
Output is correct |
50 |
Correct |
80 ms |
167340 KB |
Output is correct |
51 |
Correct |
107 ms |
172616 KB |
Output is correct |
52 |
Correct |
139 ms |
172360 KB |
Output is correct |
53 |
Correct |
107 ms |
170824 KB |
Output is correct |
54 |
Correct |
82 ms |
169032 KB |
Output is correct |
55 |
Correct |
98 ms |
169296 KB |
Output is correct |
56 |
Correct |
93 ms |
170816 KB |
Output is correct |
57 |
Correct |
95 ms |
173384 KB |
Output is correct |
58 |
Correct |
106 ms |
171156 KB |
Output is correct |
59 |
Correct |
101 ms |
171972 KB |
Output is correct |
60 |
Correct |
109 ms |
172228 KB |
Output is correct |
61 |
Correct |
99 ms |
171816 KB |
Output is correct |
62 |
Correct |
126 ms |
179016 KB |
Output is correct |
63 |
Correct |
114 ms |
180456 KB |
Output is correct |
64 |
Correct |
157 ms |
182116 KB |
Output is correct |
65 |
Runtime error |
291 ms |
262144 KB |
Execution killed with signal 9 |
66 |
Halted |
0 ms |
0 KB |
- |