#include <bits/stdc++.h>
#define FAST ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);cerr.tie(0)
#define mp make_pair
#define xx first
#define yy second
#define pb push_back
#define pf push_front
#define popb pop_back
#define popf pop_front
#define all(x) x.begin(),x.end()
#define ff(i,a,b) for (int i = a; i < b; i++)
#define fff(i,a,b) for (int i = a; i <= b; i++)
#define bff(i,a,b) for (int i = b-1; i >= a; i--)
#define bfff(i,a,b) for (int i = b; i >= a; i--)
using namespace std;
long double typedef ld;
unsigned int typedef ui;
long long int typedef li;
pair<int,int> typedef pii;
pair<li,li> typedef pli;
pair<ld,ld> typedef pld;
vector<vector<int>> typedef graph;
unsigned long long int typedef ull;
//const int mod = 998244353;
const int mod = 1000000007;
//Note to self: Check for overflow
int a[503],b[503];
int dp[2200006];
int solve3v(int n)
{
dp[0]=1;
fff(i,1,n) fff(j,0,i-1) if (a[i]>a[j]) (dp[i]+=dp[j])%=mod;
int ans=0;
fff(i,1,n) (ans+=dp[i])%=mod;
return ans;
}
vector<pair<pii,int>> segs;
int solve(int n)
{
int shift=0;
fff(i,1,n) segs.pb({{a[i],b[i]},i});
sort(all(segs));
int maxr=0;
for (auto it : segs)
{
if (it.xx.xx>maxr) shift+=it.xx.xx-(maxr+1);
a[it.yy]=it.xx.xx-shift,b[it.yy]=it.xx.yy-shift;
maxr=max(maxr,it.xx.yy-shift);
}
dp[0]=1;
fff(i,1,n)
{
int tsum=0;
fff(s,0,1'200'000)
{
(tsum+=dp[s])%=mod;
if (a[i]<=s && s<=b[i]) dp[s]=tsum;
}
//cout<<i<<": "; cout<<"["<<a[i]<<","<<b[i]<<"] --- ";
fff(s,0,10) cout<<dp[s]<<" "; cout<<endl;
}
int ans=0;
fff(s,1,1'200'000) (ans+=dp[s])%=mod;
return ans;
}
int main()
{
FAST;
int n; cin>>n;
fff(i,1,n) cin>>a[i]>>b[i];
bool radi3v=true;
fff(i,1,n) if (a[i]!=b[i]) radi3v=false;
if (radi3v) cout<<solve3v(n)<<"\n";
else cout<<solve(n)<<"\n";
}
//Note to self: Check for overflow
Compilation message
boat.cpp: In function 'int solve(int)':
boat.cpp:13:20: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
13 | #define fff(i,a,b) for (int i = a; i <= b; i++)
| ^~~
boat.cpp:77:9: note: in expansion of macro 'fff'
77 | fff(s,0,10) cout<<dp[s]<<" "; cout<<endl;
| ^~~
boat.cpp:77:39: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
77 | fff(s,0,10) cout<<dp[s]<<" "; cout<<endl;
| ^~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
2 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
2 ms |
340 KB |
Output is correct |
| 7 |
Correct |
2 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
1 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| 19 |
Correct |
1 ms |
212 KB |
Output is correct |
| 20 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
2 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
2 ms |
340 KB |
Output is correct |
| 7 |
Correct |
2 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
1 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| 19 |
Correct |
1 ms |
212 KB |
Output is correct |
| 20 |
Correct |
1 ms |
340 KB |
Output is correct |
| 21 |
Execution timed out |
2070 ms |
460 KB |
Time limit exceeded |
| 22 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
457 ms |
4940 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
2 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
2 ms |
340 KB |
Output is correct |
| 7 |
Correct |
2 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
1 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| 19 |
Correct |
1 ms |
212 KB |
Output is correct |
| 20 |
Correct |
1 ms |
340 KB |
Output is correct |
| 21 |
Execution timed out |
2070 ms |
460 KB |
Time limit exceeded |
| 22 |
Halted |
0 ms |
0 KB |
- |
