| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 107331 |
2019-04-23T11:00:48 Z |
username |
Boat (APIO16_boat) |
C++14 |
|
3 ms |
384 KB |
#include<bits/stdc++.h>
#include<stdint.h>
#define int int64_t
using namespace std;
typedef pair<int,int> pii;
#define REP(i,j,k) for(int i=(j);i<(k);++i)
#define RREP(i,j,k) for(int i=(j)-1;i>=(k);--i)
#define MST(a,v) memset(a,(v),sizeof a)
#define ALL(x) x.begin(),x.end()
#define pb push_back
#define F first
#define S second
#define IOS cin.tie(0),ios_base::sync_with_stdio(false)
#define add(x,y) x=(x+y)%mo
const int maxn=509,mo=1e9L+7;
int n,q=0,a[maxn],b[maxn],dp[maxn];
vector<int>p;
int qp(int x,int t){
int re=1;
while(t){
if(t&1)re=re*x%mo;
x=x*x%mo,t>>=1;
}
return re;
}
main(){
IOS;
cin>>n;
REP(i,0,n)cin>>a[i]>>b[i],++b[i],p.pb(a[i]),p.pb(b[i]);
sort(ALL(p));
p.erase(unique(ALL(p)),p.end());
REP(i,0,n)a[i]=lower_bound(ALL(p),a[i])-p.begin(),b[i]=lower_bound(ALL(p),b[i])-p.begin();
dp[0]=1;
REP(i,0,q-1){
RREP(j,n,0){
int l=p[i+1]-p[i];
if(a[j]<=i&&i<b[j]){
int c=l,t=1;
RREP(k,j+1,0){
add(dp[j+1],dp[k]*c%mo);
if(k&&a[k-1]<=i&&i<b[k-1])c=c*(k+l)%mo*qp(k+1,mo-2)%mo,++t;
}
}
}
}
int sum=0;
REP(i,0,n)add(sum,dp[i+1]);
cout<<sum<<endl;
}
Compilation message
boat.cpp:29:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
main(){
^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
384 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
384 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
3 ms |
384 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
384 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
