#include<bits/stdc++.h>
using namespace std;
const int MX = 505;
const int Mod = 1e9 + 7;
int a[MX], b[MX];
map<tuple<int,int,int>,int>dp;
int n;
int solve(int i, int prev, int more) {
if(i>n) return (prev!=0);
if(dp.count(make_tuple(i, prev, more))) return dp[make_tuple(i, prev, more)];
int ret = 0;
ret = solve(i+1, prev, more);
for(int cur=max(a[i], a[prev]+more+1); cur<=b[i]; ++cur) {
ret += solve(i+1, i, cur-a[i]);
if(ret>=Mod) ret -= Mod;
}
return dp[make_tuple(i, prev, more)] = ret;
}
void PlayGround() {
cin >> n;
for(int i=1; i<=n; ++i) {
cin >> a[i] >> b[i];
}
cout << solve(1, 0, 0) << endl;
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
PlayGround();
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
72 ms |
8176 KB |
Output is correct |
2 |
Correct |
82 ms |
8112 KB |
Output is correct |
3 |
Correct |
88 ms |
8088 KB |
Output is correct |
4 |
Correct |
71 ms |
8112 KB |
Output is correct |
5 |
Correct |
73 ms |
8168 KB |
Output is correct |
6 |
Correct |
77 ms |
8088 KB |
Output is correct |
7 |
Correct |
83 ms |
8096 KB |
Output is correct |
8 |
Correct |
116 ms |
8188 KB |
Output is correct |
9 |
Correct |
85 ms |
8136 KB |
Output is correct |
10 |
Correct |
87 ms |
8204 KB |
Output is correct |
11 |
Correct |
94 ms |
8096 KB |
Output is correct |
12 |
Correct |
86 ms |
8124 KB |
Output is correct |
13 |
Correct |
83 ms |
8184 KB |
Output is correct |
14 |
Correct |
86 ms |
8124 KB |
Output is correct |
15 |
Correct |
79 ms |
8140 KB |
Output is correct |
16 |
Correct |
75 ms |
8196 KB |
Output is correct |
17 |
Correct |
73 ms |
8132 KB |
Output is correct |
18 |
Correct |
73 ms |
8116 KB |
Output is correct |
19 |
Correct |
72 ms |
8096 KB |
Output is correct |
20 |
Correct |
72 ms |
8132 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
72 ms |
8176 KB |
Output is correct |
2 |
Correct |
82 ms |
8112 KB |
Output is correct |
3 |
Correct |
88 ms |
8088 KB |
Output is correct |
4 |
Correct |
71 ms |
8112 KB |
Output is correct |
5 |
Correct |
73 ms |
8168 KB |
Output is correct |
6 |
Correct |
77 ms |
8088 KB |
Output is correct |
7 |
Correct |
83 ms |
8096 KB |
Output is correct |
8 |
Correct |
116 ms |
8188 KB |
Output is correct |
9 |
Correct |
85 ms |
8136 KB |
Output is correct |
10 |
Correct |
87 ms |
8204 KB |
Output is correct |
11 |
Correct |
94 ms |
8096 KB |
Output is correct |
12 |
Correct |
86 ms |
8124 KB |
Output is correct |
13 |
Correct |
83 ms |
8184 KB |
Output is correct |
14 |
Correct |
86 ms |
8124 KB |
Output is correct |
15 |
Correct |
79 ms |
8140 KB |
Output is correct |
16 |
Correct |
75 ms |
8196 KB |
Output is correct |
17 |
Correct |
73 ms |
8132 KB |
Output is correct |
18 |
Correct |
73 ms |
8116 KB |
Output is correct |
19 |
Correct |
72 ms |
8096 KB |
Output is correct |
20 |
Correct |
72 ms |
8132 KB |
Output is correct |
21 |
Execution timed out |
2071 ms |
2292 KB |
Time limit exceeded |
22 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
2064 ms |
204 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
72 ms |
8176 KB |
Output is correct |
2 |
Correct |
82 ms |
8112 KB |
Output is correct |
3 |
Correct |
88 ms |
8088 KB |
Output is correct |
4 |
Correct |
71 ms |
8112 KB |
Output is correct |
5 |
Correct |
73 ms |
8168 KB |
Output is correct |
6 |
Correct |
77 ms |
8088 KB |
Output is correct |
7 |
Correct |
83 ms |
8096 KB |
Output is correct |
8 |
Correct |
116 ms |
8188 KB |
Output is correct |
9 |
Correct |
85 ms |
8136 KB |
Output is correct |
10 |
Correct |
87 ms |
8204 KB |
Output is correct |
11 |
Correct |
94 ms |
8096 KB |
Output is correct |
12 |
Correct |
86 ms |
8124 KB |
Output is correct |
13 |
Correct |
83 ms |
8184 KB |
Output is correct |
14 |
Correct |
86 ms |
8124 KB |
Output is correct |
15 |
Correct |
79 ms |
8140 KB |
Output is correct |
16 |
Correct |
75 ms |
8196 KB |
Output is correct |
17 |
Correct |
73 ms |
8132 KB |
Output is correct |
18 |
Correct |
73 ms |
8116 KB |
Output is correct |
19 |
Correct |
72 ms |
8096 KB |
Output is correct |
20 |
Correct |
72 ms |
8132 KB |
Output is correct |
21 |
Execution timed out |
2071 ms |
2292 KB |
Time limit exceeded |
22 |
Halted |
0 ms |
0 KB |
- |