#include<bits/stdc++.h>
using namespace std;
#define int long long
#define fr first
#define sc second
const int mod = 1e9+7;
int n;
int32_t main() {
cin >> n;
map<int,int> dp;
dp[0] = 1;
for(int i = 1; i <= n; i++) {
int a,b; cin >> a >> b;
int sum = 0;
for(auto X : dp) {
if(X.fr >= a) continue;
sum+= X.sc;
sum%= mod;
}
for(int j = a; j <= b; j++) {
sum+= dp[j];
sum%= mod;
dp[j] = sum;
}
}
int ans = 0;
for(auto x : dp) {
if(x.fr != 0) {
ans+= x.sc;
ans%= mod;
}
}
cout << ans << endl;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
348 KB |
Output is correct |
2 |
Correct |
2 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
2 ms |
344 KB |
Output is correct |
5 |
Correct |
1 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
348 KB |
Output is correct |
7 |
Correct |
1 ms |
348 KB |
Output is correct |
8 |
Correct |
1 ms |
444 KB |
Output is correct |
9 |
Correct |
1 ms |
436 KB |
Output is correct |
10 |
Correct |
1 ms |
348 KB |
Output is correct |
11 |
Correct |
1 ms |
348 KB |
Output is correct |
12 |
Correct |
1 ms |
348 KB |
Output is correct |
13 |
Correct |
1 ms |
348 KB |
Output is correct |
14 |
Correct |
1 ms |
348 KB |
Output is correct |
15 |
Correct |
1 ms |
348 KB |
Output is correct |
16 |
Correct |
1 ms |
344 KB |
Output is correct |
17 |
Correct |
1 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
348 KB |
Output is correct |
19 |
Correct |
1 ms |
348 KB |
Output is correct |
20 |
Correct |
1 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
348 KB |
Output is correct |
2 |
Correct |
2 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
2 ms |
344 KB |
Output is correct |
5 |
Correct |
1 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
348 KB |
Output is correct |
7 |
Correct |
1 ms |
348 KB |
Output is correct |
8 |
Correct |
1 ms |
444 KB |
Output is correct |
9 |
Correct |
1 ms |
436 KB |
Output is correct |
10 |
Correct |
1 ms |
348 KB |
Output is correct |
11 |
Correct |
1 ms |
348 KB |
Output is correct |
12 |
Correct |
1 ms |
348 KB |
Output is correct |
13 |
Correct |
1 ms |
348 KB |
Output is correct |
14 |
Correct |
1 ms |
348 KB |
Output is correct |
15 |
Correct |
1 ms |
348 KB |
Output is correct |
16 |
Correct |
1 ms |
344 KB |
Output is correct |
17 |
Correct |
1 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
348 KB |
Output is correct |
19 |
Correct |
1 ms |
348 KB |
Output is correct |
20 |
Correct |
1 ms |
348 KB |
Output is correct |
21 |
Correct |
90 ms |
600 KB |
Output is correct |
22 |
Correct |
96 ms |
600 KB |
Output is correct |
23 |
Correct |
89 ms |
752 KB |
Output is correct |
24 |
Correct |
99 ms |
600 KB |
Output is correct |
25 |
Correct |
100 ms |
852 KB |
Output is correct |
26 |
Correct |
94 ms |
592 KB |
Output is correct |
27 |
Correct |
97 ms |
600 KB |
Output is correct |
28 |
Correct |
98 ms |
604 KB |
Output is correct |
29 |
Correct |
99 ms |
848 KB |
Output is correct |
30 |
Execution timed out |
2040 ms |
37860 KB |
Time limit exceeded |
31 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
2063 ms |
292032 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
348 KB |
Output is correct |
2 |
Correct |
2 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
2 ms |
344 KB |
Output is correct |
5 |
Correct |
1 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
348 KB |
Output is correct |
7 |
Correct |
1 ms |
348 KB |
Output is correct |
8 |
Correct |
1 ms |
444 KB |
Output is correct |
9 |
Correct |
1 ms |
436 KB |
Output is correct |
10 |
Correct |
1 ms |
348 KB |
Output is correct |
11 |
Correct |
1 ms |
348 KB |
Output is correct |
12 |
Correct |
1 ms |
348 KB |
Output is correct |
13 |
Correct |
1 ms |
348 KB |
Output is correct |
14 |
Correct |
1 ms |
348 KB |
Output is correct |
15 |
Correct |
1 ms |
348 KB |
Output is correct |
16 |
Correct |
1 ms |
344 KB |
Output is correct |
17 |
Correct |
1 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
348 KB |
Output is correct |
19 |
Correct |
1 ms |
348 KB |
Output is correct |
20 |
Correct |
1 ms |
348 KB |
Output is correct |
21 |
Correct |
90 ms |
600 KB |
Output is correct |
22 |
Correct |
96 ms |
600 KB |
Output is correct |
23 |
Correct |
89 ms |
752 KB |
Output is correct |
24 |
Correct |
99 ms |
600 KB |
Output is correct |
25 |
Correct |
100 ms |
852 KB |
Output is correct |
26 |
Correct |
94 ms |
592 KB |
Output is correct |
27 |
Correct |
97 ms |
600 KB |
Output is correct |
28 |
Correct |
98 ms |
604 KB |
Output is correct |
29 |
Correct |
99 ms |
848 KB |
Output is correct |
30 |
Execution timed out |
2040 ms |
37860 KB |
Time limit exceeded |
31 |
Halted |
0 ms |
0 KB |
- |