#include <bits/stdc++.h>
using namespace std;
#define OPTM ios_base::sync_with_stdio(0); cin.tie(0);
#define INF int64_t(1e9+7)
#define ln '\n'
#define ll long long
#define ull unsigned long long
#define ui unsigned int
#define us unsigned short
#define FOR(i,s,n) for (int i = s; i < n; i++)
#define FORR(i,n,s) for (int i = n; i > s; i--)
#define FORX(u, arr) for (auto u : arr)
#define PB push_back
#define in(v,x) (v.find(x) != v.end())
#define F first
#define S second
#define PII pair<int, int>
#define PLL pair<ll, ll>
#define UM unordered_map
#define US unordered_set
#define PQ priority_queue
#define ALL(v) v.begin(), v.end()
const ll LLINF = 1e18+1;
// #define int long long
const int MAXN = 5e2+1, MAXX = 1e6+10;
int n;
int l[MAXN], r[MAXN];
vector<int> uncc;
UM<int,int> cc;
US<int> vis;
int dp[MAXN][MAXX];
void add(int x) {
if (!vis.count(x)) {
vis.insert(x);
uncc.PB(x);
}
}
signed main() {
OPTM;
cin >> n;
FOR(i,1,n+1) {
cin >> l[i] >> r[i];
FOR(j,l[i],r[i]+1) add(j);
}
uncc.PB(0);
sort(ALL(uncc));
int vn = uncc.size();
FOR(i,0,vn) cc[uncc[i]] = i;
FOR(i,1,n+1) {
int cl = cc[l[i]], cr = cc[r[i]];
FOR(j,cl,cr+1) {
dp[i][j] = 1;
FOR(k,1,i) dp[i][j] = (dp[i][j]+dp[k][j-1])%INF;
}
FOR(j,1,vn) dp[i][j] = (dp[i][j]+dp[i][j-1])%INF;
}
// FOR(i,1,n+1) {
// FOR(j,0,vn) cout << dp[i][j] << ' ';
// cout << ln;
// }
int res = 0;
FOR(i,1,n+1) res = (res+dp[i][vn-1])%INF;
cout << res;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
5 ms |
5304 KB |
Output is correct |
2 |
Correct |
5 ms |
5332 KB |
Output is correct |
3 |
Correct |
6 ms |
5332 KB |
Output is correct |
4 |
Correct |
6 ms |
5348 KB |
Output is correct |
5 |
Correct |
5 ms |
5332 KB |
Output is correct |
6 |
Correct |
5 ms |
5332 KB |
Output is correct |
7 |
Correct |
5 ms |
5332 KB |
Output is correct |
8 |
Correct |
5 ms |
5256 KB |
Output is correct |
9 |
Correct |
5 ms |
5332 KB |
Output is correct |
10 |
Correct |
5 ms |
5360 KB |
Output is correct |
11 |
Correct |
5 ms |
5332 KB |
Output is correct |
12 |
Correct |
5 ms |
5244 KB |
Output is correct |
13 |
Correct |
5 ms |
5332 KB |
Output is correct |
14 |
Correct |
5 ms |
5332 KB |
Output is correct |
15 |
Correct |
6 ms |
5332 KB |
Output is correct |
16 |
Correct |
3 ms |
4436 KB |
Output is correct |
17 |
Correct |
3 ms |
4436 KB |
Output is correct |
18 |
Correct |
3 ms |
4436 KB |
Output is correct |
19 |
Correct |
3 ms |
4436 KB |
Output is correct |
20 |
Correct |
3 ms |
4436 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
5 ms |
5304 KB |
Output is correct |
2 |
Correct |
5 ms |
5332 KB |
Output is correct |
3 |
Correct |
6 ms |
5332 KB |
Output is correct |
4 |
Correct |
6 ms |
5348 KB |
Output is correct |
5 |
Correct |
5 ms |
5332 KB |
Output is correct |
6 |
Correct |
5 ms |
5332 KB |
Output is correct |
7 |
Correct |
5 ms |
5332 KB |
Output is correct |
8 |
Correct |
5 ms |
5256 KB |
Output is correct |
9 |
Correct |
5 ms |
5332 KB |
Output is correct |
10 |
Correct |
5 ms |
5360 KB |
Output is correct |
11 |
Correct |
5 ms |
5332 KB |
Output is correct |
12 |
Correct |
5 ms |
5244 KB |
Output is correct |
13 |
Correct |
5 ms |
5332 KB |
Output is correct |
14 |
Correct |
5 ms |
5332 KB |
Output is correct |
15 |
Correct |
6 ms |
5332 KB |
Output is correct |
16 |
Correct |
3 ms |
4436 KB |
Output is correct |
17 |
Correct |
3 ms |
4436 KB |
Output is correct |
18 |
Correct |
3 ms |
4436 KB |
Output is correct |
19 |
Correct |
3 ms |
4436 KB |
Output is correct |
20 |
Correct |
3 ms |
4436 KB |
Output is correct |
21 |
Correct |
1018 ms |
14936 KB |
Output is correct |
22 |
Correct |
985 ms |
15020 KB |
Output is correct |
23 |
Correct |
914 ms |
14924 KB |
Output is correct |
24 |
Correct |
1008 ms |
15040 KB |
Output is correct |
25 |
Correct |
986 ms |
14920 KB |
Output is correct |
26 |
Correct |
1041 ms |
12300 KB |
Output is correct |
27 |
Correct |
1065 ms |
12284 KB |
Output is correct |
28 |
Correct |
1052 ms |
12304 KB |
Output is correct |
29 |
Correct |
1064 ms |
12220 KB |
Output is correct |
30 |
Runtime error |
1168 ms |
524288 KB |
Execution killed with signal 9 |
31 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
666 ms |
524288 KB |
Execution killed with signal 9 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
5 ms |
5304 KB |
Output is correct |
2 |
Correct |
5 ms |
5332 KB |
Output is correct |
3 |
Correct |
6 ms |
5332 KB |
Output is correct |
4 |
Correct |
6 ms |
5348 KB |
Output is correct |
5 |
Correct |
5 ms |
5332 KB |
Output is correct |
6 |
Correct |
5 ms |
5332 KB |
Output is correct |
7 |
Correct |
5 ms |
5332 KB |
Output is correct |
8 |
Correct |
5 ms |
5256 KB |
Output is correct |
9 |
Correct |
5 ms |
5332 KB |
Output is correct |
10 |
Correct |
5 ms |
5360 KB |
Output is correct |
11 |
Correct |
5 ms |
5332 KB |
Output is correct |
12 |
Correct |
5 ms |
5244 KB |
Output is correct |
13 |
Correct |
5 ms |
5332 KB |
Output is correct |
14 |
Correct |
5 ms |
5332 KB |
Output is correct |
15 |
Correct |
6 ms |
5332 KB |
Output is correct |
16 |
Correct |
3 ms |
4436 KB |
Output is correct |
17 |
Correct |
3 ms |
4436 KB |
Output is correct |
18 |
Correct |
3 ms |
4436 KB |
Output is correct |
19 |
Correct |
3 ms |
4436 KB |
Output is correct |
20 |
Correct |
3 ms |
4436 KB |
Output is correct |
21 |
Correct |
1018 ms |
14936 KB |
Output is correct |
22 |
Correct |
985 ms |
15020 KB |
Output is correct |
23 |
Correct |
914 ms |
14924 KB |
Output is correct |
24 |
Correct |
1008 ms |
15040 KB |
Output is correct |
25 |
Correct |
986 ms |
14920 KB |
Output is correct |
26 |
Correct |
1041 ms |
12300 KB |
Output is correct |
27 |
Correct |
1065 ms |
12284 KB |
Output is correct |
28 |
Correct |
1052 ms |
12304 KB |
Output is correct |
29 |
Correct |
1064 ms |
12220 KB |
Output is correct |
30 |
Runtime error |
1168 ms |
524288 KB |
Execution killed with signal 9 |
31 |
Halted |
0 ms |
0 KB |
- |