oj.uz

Submission #793026

# Submission time Handle Problem Language Result Execution time Memory
793026 2023-07-25T12:46:12 Z algorithm16 Boat (APIO16_boat) C++14
58 / 100
 2000 ms 12116 KB 
#include<iostream>
#include<cstring>
#include<vector>
#include<algorithm>
using namespace std;
int n,a[505],b[505],dp[1505][2][505][2],inv[505],mod=1e9+7;
vector <int> v,v1;
vector <vector<int> > v2;
int sum(int a,int b) {
	return (a+b)%mod;
}
int mul(int a,int b) {
	return ((long long)a*b)%mod;
}
int exp(int a,int b) {
	if(!b) return 1;
	int ret=exp(a,b/2);
	if(b%2==0) return mul(ret,ret);
	return mul(mul(ret,ret),a);
}
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cin >> n;
	for(int i=0;i<n;i++) {
		cin >> a[i] >> b[i];
		v.push_back(a[i]);
		v.push_back(b[i]);
		v.push_back(b[i]+1);
	}
	sort(v.begin(),v.end());
	v.erase(unique(v.begin(),v.end()),v.end());
	/*for(int i=0;i<v.size()-1;i++) {
		cout << v[i] << " " << v[i+1]-1 << "\n";
	}*/
	/*for(int i=0;i<n;i++) {
		a[i]=lower_bound(v.begin(),v.end(),a[i])-v.begin();
		b[i]=lower_bound(v.begin(),v.end(),b[i])-v.begin();
	}*/
	for(int i=1;i<=n;i++) {
		inv[i]=exp(i,mod-2);
	}
	for(int i=0;i<v.size()-1;i++) {
		for(int j=0;j<=n;j++) {
			dp[i][n%2][j][0]=1;
			dp[i][n%2][j][1]=1;
		}
	}
	for(int x=n-1;x>=0;x--) {
		for(int idx=v.size()-2;idx>=0;idx--) {
			for(int cnt=0;cnt<=x;cnt++) {
				for(int a1=0;a1<2;a1++) {
					int ret=0;
					if(!a1) ret=sum(ret,dp[idx][(x+1)%2][cnt][0]); // 0
					if(v[idx+1]-1<=b[x]) {
						if(v[idx]>=a[x] && v[idx+1]-1<=b[x]) {
							if(cnt<=v[idx+1]-1-v[idx]) ret=sum(ret,mul(dp[idx][(x+1)%2][cnt+1][0],mul(v[idx+1]-v[idx]-cnt,inv[cnt+1])));
						}
						ret=sum(ret,dp[idx+1][x%2][0][1]);
					}
					dp[idx][x%2][cnt][a1]=ret;
					//cout << idx << " " << x << " " << cnt << " " << a1 << "  " << ret << "\n";
				}
			}
		}
	}
	cout << dp[0][0][0][0]-1;
	return 0;
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:44:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |  for(int i=0;i<v.size()-1;i++) {
      |              ~^~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1101 ms 8228 KB Output is correct
2 Correct 1096 ms 8232 KB Output is correct
3 Correct 1089 ms 8232 KB Output is correct
4 Correct 1082 ms 8224 KB Output is correct
5 Correct 1090 ms 8228 KB Output is correct
6 Correct 1259 ms 8232 KB Output is correct
7 Correct 1260 ms 8232 KB Output is correct
8 Correct 1258 ms 8228 KB Output is correct
9 Correct 1256 ms 8232 KB Output is correct
10 Correct 1262 ms 8232 KB Output is correct
11 Correct 1261 ms 8236 KB Output is correct
12 Correct 1247 ms 8236 KB Output is correct
13 Correct 1254 ms 8228 KB Output is correct
14 Correct 1262 ms 8236 KB Output is correct
15 Correct 1261 ms 8228 KB Output is correct
16 Correct 167 ms 1720 KB Output is correct
17 Correct 178 ms 1828 KB Output is correct
18 Correct 174 ms 1768 KB Output is correct
19 Correct 175 ms 1824 KB Output is correct
20 Correct 176 ms 1784 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1101 ms 8228 KB Output is correct
2 Correct 1096 ms 8232 KB Output is correct
3 Correct 1089 ms 8232 KB Output is correct
4 Correct 1082 ms 8224 KB Output is correct
5 Correct 1090 ms 8228 KB Output is correct
6 Correct 1259 ms 8232 KB Output is correct
7 Correct 1260 ms 8232 KB Output is correct
8 Correct 1258 ms 8228 KB Output is correct
9 Correct 1256 ms 8232 KB Output is correct
10 Correct 1262 ms 8232 KB Output is correct
11 Correct 1261 ms 8236 KB Output is correct
12 Correct 1247 ms 8236 KB Output is correct
13 Correct 1254 ms 8228 KB Output is correct
14 Correct 1262 ms 8236 KB Output is correct
15 Correct 1261 ms 8228 KB Output is correct
16 Correct 167 ms 1720 KB Output is correct
17 Correct 178 ms 1828 KB Output is correct
18 Correct 174 ms 1768 KB Output is correct
19 Correct 175 ms 1824 KB Output is correct
20 Correct 176 ms 1784 KB Output is correct
21 Correct 1627 ms 10596 KB Output is correct
22 Correct 1612 ms 10704 KB Output is correct
23 Correct 1586 ms 10476 KB Output is correct
24 Correct 1591 ms 10548 KB Output is correct
25 Correct 1601 ms 10512 KB Output is correct
26 Correct 1727 ms 9900 KB Output is correct
27 Correct 1764 ms 10176 KB Output is correct
28 Correct 1725 ms 9988 KB Output is correct
29 Correct 1740 ms 10052 KB Output is correct
30 Correct 1843 ms 11852 KB Output is correct
31 Correct 1835 ms 11740 KB Output is correct
32 Correct 1845 ms 11752 KB Output is correct
33 Correct 1833 ms 11772 KB Output is correct
34 Correct 1832 ms 11732 KB Output is correct
35 Correct 1085 ms 8232 KB Output is correct
36 Correct 1091 ms 8240 KB Output is correct
37 Correct 1090 ms 8236 KB Output is correct
38 Correct 1098 ms 8148 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 2644 KB Output is correct
2 Correct 26 ms 2692 KB Output is correct
3 Correct 27 ms 2688 KB Output is correct
4 Correct 29 ms 2644 KB Output is correct
5 Correct 30 ms 2644 KB Output is correct
6 Correct 37 ms 2672 KB Output is correct
7 Correct 37 ms 2668 KB Output is correct
8 Correct 37 ms 2672 KB Output is correct
9 Correct 37 ms 2644 KB Output is correct
10 Correct 37 ms 2644 KB Output is correct
11 Correct 28 ms 2692 KB Output is correct
12 Correct 26 ms 2644 KB Output is correct
13 Correct 27 ms 2644 KB Output is correct
14 Correct 27 ms 2692 KB Output is correct
15 Correct 28 ms 2644 KB Output is correct
16 Correct 13 ms 1480 KB Output is correct
17 Correct 14 ms 1492 KB Output is correct
18 Correct 13 ms 1448 KB Output is correct
19 Correct 12 ms 1428 KB Output is correct
20 Correct 14 ms 1364 KB Output is correct

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 1101 ms 8228 KB Output is correct
2 Correct 1096 ms 8232 KB Output is correct
3 Correct 1089 ms 8232 KB Output is correct
4 Correct 1082 ms 8224 KB Output is correct
5 Correct 1090 ms 8228 KB Output is correct
6 Correct 1259 ms 8232 KB Output is correct
7 Correct 1260 ms 8232 KB Output is correct
8 Correct 1258 ms 8228 KB Output is correct
9 Correct 1256 ms 8232 KB Output is correct
10 Correct 1262 ms 8232 KB Output is correct
11 Correct 1261 ms 8236 KB Output is correct
12 Correct 1247 ms 8236 KB Output is correct
13 Correct 1254 ms 8228 KB Output is correct
14 Correct 1262 ms 8236 KB Output is correct
15 Correct 1261 ms 8228 KB Output is correct
16 Correct 167 ms 1720 KB Output is correct
17 Correct 178 ms 1828 KB Output is correct
18 Correct 174 ms 1768 KB Output is correct
19 Correct 175 ms 1824 KB Output is correct
20 Correct 176 ms 1784 KB Output is correct
21 Correct 1627 ms 10596 KB Output is correct
22 Correct 1612 ms 10704 KB Output is correct
23 Correct 1586 ms 10476 KB Output is correct
24 Correct 1591 ms 10548 KB Output is correct
25 Correct 1601 ms 10512 KB Output is correct
26 Correct 1727 ms 9900 KB Output is correct
27 Correct 1764 ms 10176 KB Output is correct
28 Correct 1725 ms 9988 KB Output is correct
29 Correct 1740 ms 10052 KB Output is correct
30 Correct 1843 ms 11852 KB Output is correct
31 Correct 1835 ms 11740 KB Output is correct
32 Correct 1845 ms 11752 KB Output is correct
33 Correct 1833 ms 11772 KB Output is correct
34 Correct 1832 ms 11732 KB Output is correct
35 Correct 1085 ms 8232 KB Output is correct
36 Correct 1091 ms 8240 KB Output is correct
37 Correct 1090 ms 8236 KB Output is correct
38 Correct 1098 ms 8148 KB Output is correct
39 Correct 28 ms 2644 KB Output is correct
40 Correct 26 ms 2692 KB Output is correct
41 Correct 27 ms 2688 KB Output is correct
42 Correct 29 ms 2644 KB Output is correct
43 Correct 30 ms 2644 KB Output is correct
44 Correct 37 ms 2672 KB Output is correct
45 Correct 37 ms 2668 KB Output is correct
46 Correct 37 ms 2672 KB Output is correct
47 Correct 37 ms 2644 KB Output is correct
48 Correct 37 ms 2644 KB Output is correct
49 Correct 28 ms 2692 KB Output is correct
50 Correct 26 ms 2644 KB Output is correct
51 Correct 27 ms 2644 KB Output is correct
52 Correct 27 ms 2692 KB Output is correct
53 Correct 28 ms 2644 KB Output is correct
54 Correct 13 ms 1480 KB Output is correct
55 Correct 14 ms 1492 KB Output is correct
56 Correct 13 ms 1448 KB Output is correct
57 Correct 12 ms 1428 KB Output is correct
58 Correct 14 ms 1364 KB Output is correct
59 Execution timed out 2073 ms 12116 KB Time limit exceeded
60 Halted 0 ms 0 KB -