oj.uz

Submission #632093

# Submission time Handle Problem Language Result Execution time Memory
632093 2022-08-19T12:23:23 Z CSQ31 Boat (APIO16_boat) C++17
9 / 100
 322 ms 4300 KB 
#pragma GCC optimize("Ofast") 
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define sz(a) a.size()
#define all(a) a.begin(),a.end()
#define lb lower_bound
#define ub upper_bound
#define owo ios_base::sync_with_stdio(0);cin.tie(0);
#define INF (int)(1e9)
#define debug(...) fprintf(stderr, __VA_ARGS__),fflush(stderr)
#define time__(d) for(long blockTime = 0; (blockTime == 0 ? (blockTime=clock()) != 0 : false);\
debug("%s time : %.4fs\n", d, (double)(clock() - blockTime) / CLOCKS_PER_SEC))
typedef long long int ll;
typedef long double ld;
typedef pair<ll,ll> PII;
typedef pair<int,int> pii;
typedef vector<vector<int>> vii;
typedef vector<vector<ll>> VII;
ll gcd(ll a,ll b){if(!b)return a;else return gcd(b,a%b);}
const int MOD = 1e9+7;
int dp1[1001][501],dp2[1001][501]; //boat,group,cnt
int a[501],b[501];
int main()
{
	owo
	int n;
	cin>>n;
	vector<int>c;
	for(int i=0;i<n;i++){
		cin>>a[i]>>b[i];
		c.pb(a[i]);
		c.pb(b[i]+1);
	}
	sort(all(c));
	c.resize(unique(all(c)) - c.begin());
	int m = sz(c),tot = 1;
	for(int i=0;i<n;i++){
		tot = 1;
		for(int j=0;j+1<m;j++){
			int s = c[j+1]-c[j];
			for(int k=1;k<=min(n,s);k++)dp2[j][k] = dp1[j][k];
			if(a[i] <= c[j] && c[j] <= b[i]){ 
				//add you in new group
				dp2[j][1] += tot * 1LL * s%MOD;
				if(dp2[j][1]>=MOD)dp2[j][1]-=MOD;
				//add you to existing group
				for(int k=2;k<=min(n,s);k++){
					dp2[j][k] += dp1[j][k-1] * 1LL * (s-k+1)%MOD;
					if(dp2[j][k]>=MOD)dp2[j][k]-=MOD;
				}
			}
			for(int k=1;k<=min(n,s);k++){//update tot
				tot+=dp1[j][k];
				if(tot>=MOD)tot-=MOD;
			}	
		}
		for(int j=0;j<m;j++){
			for(int k=1;k<=n;k++){
				dp1[j][k] = dp2[j][k];
				dp2[j][k] = 0;
			}
			
		}
	}
	int ans = 0;
	for(int i=0;i<m;i++){
		for(int j=1;j<=n;j++){
			ans+=dp1[i][j];
			ans%=MOD;
		}
	}
	cout<<ans;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 301 ms 4240 KB Output is correct
2 Correct 322 ms 4240 KB Output is correct
3 Correct 317 ms 4244 KB Output is correct
4 Correct 322 ms 4244 KB Output is correct
5 Correct 292 ms 4240 KB Output is correct
6 Correct 300 ms 4240 KB Output is correct
7 Correct 309 ms 4236 KB Output is correct
8 Correct 301 ms 4236 KB Output is correct
9 Correct 288 ms 4180 KB Output is correct
10 Correct 280 ms 4240 KB Output is correct
11 Correct 274 ms 4244 KB Output is correct
12 Correct 282 ms 4240 KB Output is correct
13 Correct 266 ms 4300 KB Output is correct
14 Correct 305 ms 4240 KB Output is correct
15 Correct 260 ms 4180 KB Output is correct
16 Correct 45 ms 980 KB Output is correct
17 Correct 53 ms 1072 KB Output is correct
18 Correct 49 ms 980 KB Output is correct
19 Correct 50 ms 1072 KB Output is correct
20 Correct 55 ms 980 KB Output is correct

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 301 ms 4240 KB Output is correct
2 Correct 322 ms 4240 KB Output is correct
3 Correct 317 ms 4244 KB Output is correct
4 Correct 322 ms 4244 KB Output is correct
5 Correct 292 ms 4240 KB Output is correct
6 Correct 300 ms 4240 KB Output is correct
7 Correct 309 ms 4236 KB Output is correct
8 Correct 301 ms 4236 KB Output is correct
9 Correct 288 ms 4180 KB Output is correct
10 Correct 280 ms 4240 KB Output is correct
11 Correct 274 ms 4244 KB Output is correct
12 Correct 282 ms 4240 KB Output is correct
13 Correct 266 ms 4300 KB Output is correct
14 Correct 305 ms 4240 KB Output is correct
15 Correct 260 ms 4180 KB Output is correct
16 Correct 45 ms 980 KB Output is correct
17 Correct 53 ms 1072 KB Output is correct
18 Correct 49 ms 980 KB Output is correct
19 Correct 50 ms 1072 KB Output is correct
20 Correct 55 ms 980 KB Output is correct
21 Incorrect 93 ms 3896 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 1120 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 301 ms 4240 KB Output is correct
2 Correct 322 ms 4240 KB Output is correct
3 Correct 317 ms 4244 KB Output is correct
4 Correct 322 ms 4244 KB Output is correct
5 Correct 292 ms 4240 KB Output is correct
6 Correct 300 ms 4240 KB Output is correct
7 Correct 309 ms 4236 KB Output is correct
8 Correct 301 ms 4236 KB Output is correct
9 Correct 288 ms 4180 KB Output is correct
10 Correct 280 ms 4240 KB Output is correct
11 Correct 274 ms 4244 KB Output is correct
12 Correct 282 ms 4240 KB Output is correct
13 Correct 266 ms 4300 KB Output is correct
14 Correct 305 ms 4240 KB Output is correct
15 Correct 260 ms 4180 KB Output is correct
16 Correct 45 ms 980 KB Output is correct
17 Correct 53 ms 1072 KB Output is correct
18 Correct 49 ms 980 KB Output is correct
19 Correct 50 ms 1072 KB Output is correct
20 Correct 55 ms 980 KB Output is correct
21 Incorrect 93 ms 3896 KB Output isn't correct
22 Halted 0 ms 0 KB -