| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 52974 |
2018-06-27T12:01:04 Z |
evpipis |
Boat (APIO16_boat) |
C++11 |
|
1627 ms |
10748 KB |
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
const int len = 502, mod = 1e9+7;
int n, m = 0;
int po[2*len], dp[2][2*len][len][2], bi[2*len][len], l[len], r[len];
vector<int> vec;
inline int add(int a, int b){
a += b;
if (a >= mod) a -= mod;
return a;
}
inline int mul(int a, int b){
return (a*1LL*b)%mod;
}
int pw(int a, int b){
if (b == 0) return 1;
if (b%2 == 0) return pw(mul(a, a), b/2);
return mul(a, pw(mul(a, a), b/2));
}
int main(){
scanf("%d", &n);
for (int i = 1; i <= n; i++){
scanf("%d %d", &l[i], &r[i]);
vec.pb(l[i]), vec.pb(r[i]);
}
sort(vec.begin(), vec.end());
for (int i = 0; i < vec.size(); i++)
if (vec[i] != po[m])
po[++m] = vec[i];
//for (int i = 0; i <= m; i++)
// printf("i = %d, poi = %d\n", i, po[i]);
for (int i = 0; i <= m; i++){
bi[i][0] = 1;
int s = po[i]-po[i-1] - 1;
for (int k = 1; k <= min(s, n); k++)
bi[i][k] = mul(bi[i][k-1], mul(s-k+1, pw(k, mod-2)));
}
for (int j = 0; j <= m+1; j++)
dp[0][j][0][0] = 1;
for (int i = 1; i <= n; i++){
dp[i&1][0][0][0] = 1;
for (int j = 1; j <= m+1; j++){
int ans = 0;
for (int x = 0; x <= i; x++){
ans = add(ans, mul(dp[i&1][j-1][x][0], bi[j-1][x]));
ans = add(ans, mul(dp[i&1][j-1][x][1], bi[j-1][x-1]));
}
dp[i&1][j][0][0] = ans;
for (int k = 1; k <= i; k++){
for (int t = 0; t < 2; t++){
ans = dp[(i-1)&1][j][k][t];
if (t == 0 && l[i] <= po[j-1]+1 && po[j]-1 <= r[i])
ans = add(ans, dp[(i-1)&1][j][k-1][0]);
if (t == 1 && l[i] <= po[j] && po[j] <= r[i])
ans = add(ans, dp[(i-1)&1][j][k-1][0]);
dp[i&1][j][k][t] = ans;
}
}
}
}
printf("%d\n", add(dp[n&1][m+1][0][0], mod-1));
return 0;
}
Compilation message
boat.cpp: In function 'int main()':
boat.cpp:34:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i = 0; i < vec.size(); i++)
~~^~~~~~~~~~~~
boat.cpp:27:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &n);
~~~~~^~~~~~~~~~
boat.cpp:29:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &l[i], &r[i]);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
546 ms |
5368 KB |
Output is correct |
| 2 |
Correct |
650 ms |
5608 KB |
Output is correct |
| 3 |
Correct |
552 ms |
5608 KB |
Output is correct |
| 4 |
Correct |
671 ms |
5608 KB |
Output is correct |
| 5 |
Correct |
532 ms |
5608 KB |
Output is correct |
| 6 |
Correct |
562 ms |
5656 KB |
Output is correct |
| 7 |
Correct |
552 ms |
5656 KB |
Output is correct |
| 8 |
Correct |
539 ms |
5664 KB |
Output is correct |
| 9 |
Correct |
591 ms |
5680 KB |
Output is correct |
| 10 |
Correct |
527 ms |
5680 KB |
Output is correct |
| 11 |
Correct |
551 ms |
5740 KB |
Output is correct |
| 12 |
Correct |
523 ms |
5740 KB |
Output is correct |
| 13 |
Correct |
556 ms |
5740 KB |
Output is correct |
| 14 |
Correct |
600 ms |
5740 KB |
Output is correct |
| 15 |
Correct |
594 ms |
5756 KB |
Output is correct |
| 16 |
Correct |
108 ms |
5756 KB |
Output is correct |
| 17 |
Correct |
114 ms |
5756 KB |
Output is correct |
| 18 |
Correct |
98 ms |
5756 KB |
Output is correct |
| 19 |
Correct |
106 ms |
5756 KB |
Output is correct |
| 20 |
Correct |
103 ms |
5756 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
546 ms |
5368 KB |
Output is correct |
| 2 |
Correct |
650 ms |
5608 KB |
Output is correct |
| 3 |
Correct |
552 ms |
5608 KB |
Output is correct |
| 4 |
Correct |
671 ms |
5608 KB |
Output is correct |
| 5 |
Correct |
532 ms |
5608 KB |
Output is correct |
| 6 |
Correct |
562 ms |
5656 KB |
Output is correct |
| 7 |
Correct |
552 ms |
5656 KB |
Output is correct |
| 8 |
Correct |
539 ms |
5664 KB |
Output is correct |
| 9 |
Correct |
591 ms |
5680 KB |
Output is correct |
| 10 |
Correct |
527 ms |
5680 KB |
Output is correct |
| 11 |
Correct |
551 ms |
5740 KB |
Output is correct |
| 12 |
Correct |
523 ms |
5740 KB |
Output is correct |
| 13 |
Correct |
556 ms |
5740 KB |
Output is correct |
| 14 |
Correct |
600 ms |
5740 KB |
Output is correct |
| 15 |
Correct |
594 ms |
5756 KB |
Output is correct |
| 16 |
Correct |
108 ms |
5756 KB |
Output is correct |
| 17 |
Correct |
114 ms |
5756 KB |
Output is correct |
| 18 |
Correct |
98 ms |
5756 KB |
Output is correct |
| 19 |
Correct |
106 ms |
5756 KB |
Output is correct |
| 20 |
Correct |
103 ms |
5756 KB |
Output is correct |
| 21 |
Correct |
1030 ms |
9596 KB |
Output is correct |
| 22 |
Correct |
1053 ms |
9816 KB |
Output is correct |
| 23 |
Correct |
980 ms |
9816 KB |
Output is correct |
| 24 |
Correct |
1033 ms |
9856 KB |
Output is correct |
| 25 |
Correct |
1036 ms |
9856 KB |
Output is correct |
| 26 |
Correct |
1095 ms |
9856 KB |
Output is correct |
| 27 |
Correct |
1075 ms |
9856 KB |
Output is correct |
| 28 |
Correct |
1026 ms |
9856 KB |
Output is correct |
| 29 |
Correct |
1125 ms |
9856 KB |
Output is correct |
| 30 |
Correct |
1175 ms |
10124 KB |
Output is correct |
| 31 |
Correct |
1204 ms |
10124 KB |
Output is correct |
| 32 |
Correct |
1113 ms |
10124 KB |
Output is correct |
| 33 |
Correct |
1020 ms |
10124 KB |
Output is correct |
| 34 |
Correct |
1089 ms |
10124 KB |
Output is correct |
| 35 |
Correct |
550 ms |
10124 KB |
Output is correct |
| 36 |
Correct |
524 ms |
10124 KB |
Output is correct |
| 37 |
Correct |
558 ms |
10124 KB |
Output is correct |
| 38 |
Correct |
556 ms |
10124 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
18 ms |
10124 KB |
Output is correct |
| 2 |
Correct |
18 ms |
10124 KB |
Output is correct |
| 3 |
Correct |
18 ms |
10124 KB |
Output is correct |
| 4 |
Correct |
18 ms |
10124 KB |
Output is correct |
| 5 |
Correct |
18 ms |
10124 KB |
Output is correct |
| 6 |
Correct |
20 ms |
10124 KB |
Output is correct |
| 7 |
Correct |
21 ms |
10124 KB |
Output is correct |
| 8 |
Correct |
21 ms |
10124 KB |
Output is correct |
| 9 |
Correct |
19 ms |
10124 KB |
Output is correct |
| 10 |
Correct |
21 ms |
10124 KB |
Output is correct |
| 11 |
Correct |
18 ms |
10124 KB |
Output is correct |
| 12 |
Correct |
18 ms |
10124 KB |
Output is correct |
| 13 |
Correct |
18 ms |
10124 KB |
Output is correct |
| 14 |
Correct |
19 ms |
10124 KB |
Output is correct |
| 15 |
Correct |
18 ms |
10124 KB |
Output is correct |
| 16 |
Correct |
10 ms |
10124 KB |
Output is correct |
| 17 |
Correct |
9 ms |
10124 KB |
Output is correct |
| 18 |
Correct |
9 ms |
10124 KB |
Output is correct |
| 19 |
Correct |
9 ms |
10124 KB |
Output is correct |
| 20 |
Correct |
10 ms |
10124 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
546 ms |
5368 KB |
Output is correct |
| 2 |
Correct |
650 ms |
5608 KB |
Output is correct |
| 3 |
Correct |
552 ms |
5608 KB |
Output is correct |
| 4 |
Correct |
671 ms |
5608 KB |
Output is correct |
| 5 |
Correct |
532 ms |
5608 KB |
Output is correct |
| 6 |
Correct |
562 ms |
5656 KB |
Output is correct |
| 7 |
Correct |
552 ms |
5656 KB |
Output is correct |
| 8 |
Correct |
539 ms |
5664 KB |
Output is correct |
| 9 |
Correct |
591 ms |
5680 KB |
Output is correct |
| 10 |
Correct |
527 ms |
5680 KB |
Output is correct |
| 11 |
Correct |
551 ms |
5740 KB |
Output is correct |
| 12 |
Correct |
523 ms |
5740 KB |
Output is correct |
| 13 |
Correct |
556 ms |
5740 KB |
Output is correct |
| 14 |
Correct |
600 ms |
5740 KB |
Output is correct |
| 15 |
Correct |
594 ms |
5756 KB |
Output is correct |
| 16 |
Correct |
108 ms |
5756 KB |
Output is correct |
| 17 |
Correct |
114 ms |
5756 KB |
Output is correct |
| 18 |
Correct |
98 ms |
5756 KB |
Output is correct |
| 19 |
Correct |
106 ms |
5756 KB |
Output is correct |
| 20 |
Correct |
103 ms |
5756 KB |
Output is correct |
| 21 |
Correct |
1030 ms |
9596 KB |
Output is correct |
| 22 |
Correct |
1053 ms |
9816 KB |
Output is correct |
| 23 |
Correct |
980 ms |
9816 KB |
Output is correct |
| 24 |
Correct |
1033 ms |
9856 KB |
Output is correct |
| 25 |
Correct |
1036 ms |
9856 KB |
Output is correct |
| 26 |
Correct |
1095 ms |
9856 KB |
Output is correct |
| 27 |
Correct |
1075 ms |
9856 KB |
Output is correct |
| 28 |
Correct |
1026 ms |
9856 KB |
Output is correct |
| 29 |
Correct |
1125 ms |
9856 KB |
Output is correct |
| 30 |
Correct |
1175 ms |
10124 KB |
Output is correct |
| 31 |
Correct |
1204 ms |
10124 KB |
Output is correct |
| 32 |
Correct |
1113 ms |
10124 KB |
Output is correct |
| 33 |
Correct |
1020 ms |
10124 KB |
Output is correct |
| 34 |
Correct |
1089 ms |
10124 KB |
Output is correct |
| 35 |
Correct |
550 ms |
10124 KB |
Output is correct |
| 36 |
Correct |
524 ms |
10124 KB |
Output is correct |
| 37 |
Correct |
558 ms |
10124 KB |
Output is correct |
| 38 |
Correct |
556 ms |
10124 KB |
Output is correct |
| 39 |
Correct |
18 ms |
10124 KB |
Output is correct |
| 40 |
Correct |
18 ms |
10124 KB |
Output is correct |
| 41 |
Correct |
18 ms |
10124 KB |
Output is correct |
| 42 |
Correct |
18 ms |
10124 KB |
Output is correct |
| 43 |
Correct |
18 ms |
10124 KB |
Output is correct |
| 44 |
Correct |
20 ms |
10124 KB |
Output is correct |
| 45 |
Correct |
21 ms |
10124 KB |
Output is correct |
| 46 |
Correct |
21 ms |
10124 KB |
Output is correct |
| 47 |
Correct |
19 ms |
10124 KB |
Output is correct |
| 48 |
Correct |
21 ms |
10124 KB |
Output is correct |
| 49 |
Correct |
18 ms |
10124 KB |
Output is correct |
| 50 |
Correct |
18 ms |
10124 KB |
Output is correct |
| 51 |
Correct |
18 ms |
10124 KB |
Output is correct |
| 52 |
Correct |
19 ms |
10124 KB |
Output is correct |
| 53 |
Correct |
18 ms |
10124 KB |
Output is correct |
| 54 |
Correct |
10 ms |
10124 KB |
Output is correct |
| 55 |
Correct |
9 ms |
10124 KB |
Output is correct |
| 56 |
Correct |
9 ms |
10124 KB |
Output is correct |
| 57 |
Correct |
9 ms |
10124 KB |
Output is correct |
| 58 |
Correct |
10 ms |
10124 KB |
Output is correct |
| 59 |
Correct |
1314 ms |
10572 KB |
Output is correct |
| 60 |
Correct |
1313 ms |
10600 KB |
Output is correct |
| 61 |
Correct |
1297 ms |
10604 KB |
Output is correct |
| 62 |
Correct |
1320 ms |
10604 KB |
Output is correct |
| 63 |
Correct |
1248 ms |
10604 KB |
Output is correct |
| 64 |
Correct |
1531 ms |
10604 KB |
Output is correct |
| 65 |
Correct |
1359 ms |
10620 KB |
Output is correct |
| 66 |
Correct |
1545 ms |
10620 KB |
Output is correct |
| 67 |
Correct |
1412 ms |
10620 KB |
Output is correct |
| 68 |
Correct |
1627 ms |
10620 KB |
Output is correct |
| 69 |
Correct |
1351 ms |
10620 KB |
Output is correct |
| 70 |
Correct |
1212 ms |
10620 KB |
Output is correct |
| 71 |
Correct |
1208 ms |
10748 KB |
Output is correct |
| 72 |
Correct |
1167 ms |
10748 KB |
Output is correct |
| 73 |
Correct |
1419 ms |
10748 KB |
Output is correct |
| 74 |
Correct |
140 ms |
10748 KB |
Output is correct |
| 75 |
Correct |
147 ms |
10748 KB |
Output is correct |
| 76 |
Correct |
129 ms |
10748 KB |
Output is correct |
| 77 |
Correct |
149 ms |
10748 KB |
Output is correct |
| 78 |
Correct |
125 ms |
10748 KB |
Output is correct |
