| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 361306 |
2021-01-29T08:36:17 Z |
tuank99lhp |
Boat (APIO16_boat) |
C++17 |
|
793 ms |
12396 KB |
#include <bits/stdc++.h>
using namespace std;
vector<long long> v;
vector<pair<long long,long long> > V;
int n,l[505],r[505],F[2][2005][505],mod,tinh[505],tinh2[2005][505];
long long lt(long long x,long long y)
{
if (y==0) return 1;
long long k=lt(x,y/2);
if (y%2) return k*k%mod*x%mod;
return k*k%mod;
}
int main()
{
// freopen("a.inp","r",stdin);
// freopen("a.out","w",stdout);
ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
cin>>n;
for (int i=1;i<=n;++i)
{
cin>>l[i]>>r[i];
v.push_back(l[i]);
v.push_back(r[i]);
}
sort(v.begin(),v.end());
v.resize(unique(v.begin(),v.end())-v.begin());
long long ct=1;
for (int i=0;i<v.size();++i)
{
if (ct<v[i]) V.push_back({ct,v[i]-ct});
ct=v[i]+1;
V.push_back({v[i],1});
}
for (int i=0;i<V.size();++i) F[0][i][0]=1;
F[1][0][0]=1;
ct=0;mod=1e9+7;
for (int i=1;i<=500;++i) tinh[i]=lt(i,mod-2);
for (int j=0;j<V.size();++j)
for (int k=1;k<=n;++k) tinh2[j][k]=tinh[k]*(V[j].second-k+1)%mod;
for (int i=1;i<=n;++i)
{
ct=1-ct;
pair<long long,long long> X={l[i],0LL};
l[i]=lower_bound(V.begin(),V.end(),X)-V.begin();
X={r[i],0LL};
r[i]=lower_bound(V.begin(),V.end(),X)-V.begin();
for (int j=0;j<V.size();++j)
{
if (j) F[ct][j][0]=0;
if (j) for (int k=0;k<=min(1LL*i,V[j-1].second);++k)
{
if (F[ct][j-1][k]==0 && F[ct][j-1][k+1]==0) break;
F[ct][j][0]+=F[ct][j-1][k];
if (F[ct][j][0]>=mod) F[ct][j][0]-=mod;
}
for (int k=1;k<=min(1LL*i,V[j].second);++k)
{
if (F[1-ct][j][k-1]==0 && F[1-ct][j][k]==0) break;
F[ct][j][k]=F[1-ct][j][k];
if (j>=l[i] && j<=r[i])
{
long long X=F[1-ct][j][k-1];
X=X*tinh2[j][k]%mod;
F[ct][j][k]+=X;
if (F[ct][j][k]>=mod) F[ct][j][k]-=mod;
}
}
}
}
long long kq=mod-1;
for (int k=0;k<=n;++k) {kq=(kq+F[ct][V.size()-1][k]);if (kq>=mod) kq-=mod;}
cout<<kq;
return 0;
}
Compilation message
boat.cpp: In function 'long long int lt(long long int, long long int)':
boat.cpp:11:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
11 | if (y%2) return k*k%mod*x%mod;
| ^~
boat.cpp:12:14: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
12 | return k*k%mod;
| ^~~~~~
boat.cpp: In function 'int main()':
boat.cpp:30:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
30 | for (int i=0;i<v.size();++i)
| ~^~~~~~~~~
boat.cpp:37:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
37 | for (int i=0;i<V.size();++i) F[0][i][0]=1;
| ~^~~~~~~~~
boat.cpp:43:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
43 | for (int j=0;j<V.size();++j)
| ~^~~~~~~~~
boat.cpp:53:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
53 | for (int j=0;j<V.size();++j)
| ~^~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 2 |
Correct |
12 ms |
6380 KB |
Output is correct |
| 3 |
Correct |
10 ms |
6400 KB |
Output is correct |
| 4 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 5 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 6 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 7 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 8 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 9 |
Correct |
12 ms |
6380 KB |
Output is correct |
| 10 |
Correct |
9 ms |
6400 KB |
Output is correct |
| 11 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 12 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 13 |
Correct |
12 ms |
6380 KB |
Output is correct |
| 14 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 15 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1388 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1516 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1388 KB |
Output is correct |
| 19 |
Correct |
2 ms |
1516 KB |
Output is correct |
| 20 |
Correct |
3 ms |
1516 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 2 |
Correct |
12 ms |
6380 KB |
Output is correct |
| 3 |
Correct |
10 ms |
6400 KB |
Output is correct |
| 4 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 5 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 6 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 7 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 8 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 9 |
Correct |
12 ms |
6380 KB |
Output is correct |
| 10 |
Correct |
9 ms |
6400 KB |
Output is correct |
| 11 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 12 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 13 |
Correct |
12 ms |
6380 KB |
Output is correct |
| 14 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 15 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1388 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1516 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1388 KB |
Output is correct |
| 19 |
Correct |
2 ms |
1516 KB |
Output is correct |
| 20 |
Correct |
3 ms |
1516 KB |
Output is correct |
| 21 |
Correct |
41 ms |
10348 KB |
Output is correct |
| 22 |
Correct |
39 ms |
10348 KB |
Output is correct |
| 23 |
Correct |
39 ms |
10220 KB |
Output is correct |
| 24 |
Correct |
44 ms |
10348 KB |
Output is correct |
| 25 |
Correct |
39 ms |
10092 KB |
Output is correct |
| 26 |
Correct |
31 ms |
9708 KB |
Output is correct |
| 27 |
Correct |
35 ms |
9836 KB |
Output is correct |
| 28 |
Correct |
38 ms |
9836 KB |
Output is correct |
| 29 |
Correct |
35 ms |
9836 KB |
Output is correct |
| 30 |
Correct |
24 ms |
11372 KB |
Output is correct |
| 31 |
Correct |
24 ms |
11372 KB |
Output is correct |
| 32 |
Correct |
28 ms |
11628 KB |
Output is correct |
| 33 |
Correct |
24 ms |
11372 KB |
Output is correct |
| 34 |
Correct |
24 ms |
11392 KB |
Output is correct |
| 35 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 36 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 37 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 38 |
Correct |
10 ms |
6252 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
2796 KB |
Output is correct |
| 2 |
Correct |
6 ms |
2796 KB |
Output is correct |
| 3 |
Correct |
6 ms |
2796 KB |
Output is correct |
| 4 |
Correct |
5 ms |
2796 KB |
Output is correct |
| 5 |
Correct |
6 ms |
2796 KB |
Output is correct |
| 6 |
Correct |
8 ms |
2796 KB |
Output is correct |
| 7 |
Correct |
8 ms |
2796 KB |
Output is correct |
| 8 |
Correct |
8 ms |
2796 KB |
Output is correct |
| 9 |
Correct |
8 ms |
2796 KB |
Output is correct |
| 10 |
Correct |
8 ms |
2796 KB |
Output is correct |
| 11 |
Correct |
6 ms |
2796 KB |
Output is correct |
| 12 |
Correct |
6 ms |
2796 KB |
Output is correct |
| 13 |
Correct |
6 ms |
2796 KB |
Output is correct |
| 14 |
Correct |
6 ms |
2796 KB |
Output is correct |
| 15 |
Correct |
6 ms |
2796 KB |
Output is correct |
| 16 |
Correct |
3 ms |
1388 KB |
Output is correct |
| 17 |
Correct |
3 ms |
1388 KB |
Output is correct |
| 18 |
Correct |
4 ms |
1388 KB |
Output is correct |
| 19 |
Correct |
3 ms |
1388 KB |
Output is correct |
| 20 |
Correct |
3 ms |
1388 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 2 |
Correct |
12 ms |
6380 KB |
Output is correct |
| 3 |
Correct |
10 ms |
6400 KB |
Output is correct |
| 4 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 5 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 6 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 7 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 8 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 9 |
Correct |
12 ms |
6380 KB |
Output is correct |
| 10 |
Correct |
9 ms |
6400 KB |
Output is correct |
| 11 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 12 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 13 |
Correct |
12 ms |
6380 KB |
Output is correct |
| 14 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 15 |
Correct |
9 ms |
6380 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1388 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1516 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1388 KB |
Output is correct |
| 19 |
Correct |
2 ms |
1516 KB |
Output is correct |
| 20 |
Correct |
3 ms |
1516 KB |
Output is correct |
| 21 |
Correct |
41 ms |
10348 KB |
Output is correct |
| 22 |
Correct |
39 ms |
10348 KB |
Output is correct |
| 23 |
Correct |
39 ms |
10220 KB |
Output is correct |
| 24 |
Correct |
44 ms |
10348 KB |
Output is correct |
| 25 |
Correct |
39 ms |
10092 KB |
Output is correct |
| 26 |
Correct |
31 ms |
9708 KB |
Output is correct |
| 27 |
Correct |
35 ms |
9836 KB |
Output is correct |
| 28 |
Correct |
38 ms |
9836 KB |
Output is correct |
| 29 |
Correct |
35 ms |
9836 KB |
Output is correct |
| 30 |
Correct |
24 ms |
11372 KB |
Output is correct |
| 31 |
Correct |
24 ms |
11372 KB |
Output is correct |
| 32 |
Correct |
28 ms |
11628 KB |
Output is correct |
| 33 |
Correct |
24 ms |
11372 KB |
Output is correct |
| 34 |
Correct |
24 ms |
11392 KB |
Output is correct |
| 35 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 36 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 37 |
Correct |
10 ms |
6380 KB |
Output is correct |
| 38 |
Correct |
10 ms |
6252 KB |
Output is correct |
| 39 |
Correct |
5 ms |
2796 KB |
Output is correct |
| 40 |
Correct |
6 ms |
2796 KB |
Output is correct |
| 41 |
Correct |
6 ms |
2796 KB |
Output is correct |
| 42 |
Correct |
5 ms |
2796 KB |
Output is correct |
| 43 |
Correct |
6 ms |
2796 KB |
Output is correct |
| 44 |
Correct |
8 ms |
2796 KB |
Output is correct |
| 45 |
Correct |
8 ms |
2796 KB |
Output is correct |
| 46 |
Correct |
8 ms |
2796 KB |
Output is correct |
| 47 |
Correct |
8 ms |
2796 KB |
Output is correct |
| 48 |
Correct |
8 ms |
2796 KB |
Output is correct |
| 49 |
Correct |
6 ms |
2796 KB |
Output is correct |
| 50 |
Correct |
6 ms |
2796 KB |
Output is correct |
| 51 |
Correct |
6 ms |
2796 KB |
Output is correct |
| 52 |
Correct |
6 ms |
2796 KB |
Output is correct |
| 53 |
Correct |
6 ms |
2796 KB |
Output is correct |
| 54 |
Correct |
3 ms |
1388 KB |
Output is correct |
| 55 |
Correct |
3 ms |
1388 KB |
Output is correct |
| 56 |
Correct |
4 ms |
1388 KB |
Output is correct |
| 57 |
Correct |
3 ms |
1388 KB |
Output is correct |
| 58 |
Correct |
3 ms |
1388 KB |
Output is correct |
| 59 |
Correct |
455 ms |
12268 KB |
Output is correct |
| 60 |
Correct |
419 ms |
12396 KB |
Output is correct |
| 61 |
Correct |
407 ms |
12396 KB |
Output is correct |
| 62 |
Correct |
449 ms |
12268 KB |
Output is correct |
| 63 |
Correct |
433 ms |
12396 KB |
Output is correct |
| 64 |
Correct |
784 ms |
12396 KB |
Output is correct |
| 65 |
Correct |
779 ms |
12396 KB |
Output is correct |
| 66 |
Correct |
787 ms |
12396 KB |
Output is correct |
| 67 |
Correct |
769 ms |
12324 KB |
Output is correct |
| 68 |
Correct |
793 ms |
12396 KB |
Output is correct |
| 69 |
Correct |
450 ms |
12396 KB |
Output is correct |
| 70 |
Correct |
444 ms |
12396 KB |
Output is correct |
| 71 |
Correct |
471 ms |
12396 KB |
Output is correct |
| 72 |
Correct |
477 ms |
12324 KB |
Output is correct |
| 73 |
Correct |
466 ms |
12324 KB |
Output is correct |
| 74 |
Correct |
42 ms |
1636 KB |
Output is correct |
| 75 |
Correct |
41 ms |
1516 KB |
Output is correct |
| 76 |
Correct |
42 ms |
1516 KB |
Output is correct |
| 77 |
Correct |
42 ms |
1516 KB |
Output is correct |
| 78 |
Correct |
43 ms |
1516 KB |
Output is correct |
