oj.uz

Submission #632087

# Submission time Handle Problem Language Result Execution time Memory
632087 2022-08-19T12:16:02 Z CSQ31 Boat (APIO16_boat) C++17
9 / 100
 253 ms 4308 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;
				if(i){ //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+1<m;j++){
			int s = c[j+1]-c[j];
			for(int k=1;k<=min(n,s);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 249 ms 4244 KB Output is correct
2 Correct 238 ms 4244 KB Output is correct
3 Correct 230 ms 4252 KB Output is correct
4 Correct 230 ms 4248 KB Output is correct
5 Correct 233 ms 4180 KB Output is correct
6 Correct 237 ms 4252 KB Output is correct
7 Correct 238 ms 4180 KB Output is correct
8 Correct 227 ms 4252 KB Output is correct
9 Correct 232 ms 4180 KB Output is correct
10 Correct 232 ms 4244 KB Output is correct
11 Correct 225 ms 4244 KB Output is correct
12 Correct 224 ms 4180 KB Output is correct
13 Correct 253 ms 4308 KB Output is correct
14 Correct 242 ms 4180 KB Output is correct
15 Correct 230 ms 4248 KB Output is correct
16 Correct 41 ms 980 KB Output is correct
17 Correct 49 ms 980 KB Output is correct
18 Correct 42 ms 1056 KB Output is correct
19 Correct 44 ms 980 KB Output is correct
20 Correct 42 ms 980 KB Output is correct

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 249 ms 4244 KB Output is correct
2 Correct 238 ms 4244 KB Output is correct
3 Correct 230 ms 4252 KB Output is correct
4 Correct 230 ms 4248 KB Output is correct
5 Correct 233 ms 4180 KB Output is correct
6 Correct 237 ms 4252 KB Output is correct
7 Correct 238 ms 4180 KB Output is correct
8 Correct 227 ms 4252 KB Output is correct
9 Correct 232 ms 4180 KB Output is correct
10 Correct 232 ms 4244 KB Output is correct
11 Correct 225 ms 4244 KB Output is correct
12 Correct 224 ms 4180 KB Output is correct
13 Correct 253 ms 4308 KB Output is correct
14 Correct 242 ms 4180 KB Output is correct
15 Correct 230 ms 4248 KB Output is correct
16 Correct 41 ms 980 KB Output is correct
17 Correct 49 ms 980 KB Output is correct
18 Correct 42 ms 1056 KB Output is correct
19 Correct 44 ms 980 KB Output is correct
20 Correct 42 ms 980 KB Output is correct
21 Incorrect 21 ms 3924 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 7 ms 1116 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 249 ms 4244 KB Output is correct
2 Correct 238 ms 4244 KB Output is correct
3 Correct 230 ms 4252 KB Output is correct
4 Correct 230 ms 4248 KB Output is correct
5 Correct 233 ms 4180 KB Output is correct
6 Correct 237 ms 4252 KB Output is correct
7 Correct 238 ms 4180 KB Output is correct
8 Correct 227 ms 4252 KB Output is correct
9 Correct 232 ms 4180 KB Output is correct
10 Correct 232 ms 4244 KB Output is correct
11 Correct 225 ms 4244 KB Output is correct
12 Correct 224 ms 4180 KB Output is correct
13 Correct 253 ms 4308 KB Output is correct
14 Correct 242 ms 4180 KB Output is correct
15 Correct 230 ms 4248 KB Output is correct
16 Correct 41 ms 980 KB Output is correct
17 Correct 49 ms 980 KB Output is correct
18 Correct 42 ms 1056 KB Output is correct
19 Correct 44 ms 980 KB Output is correct
20 Correct 42 ms 980 KB Output is correct
21 Incorrect 21 ms 3924 KB Output isn't correct
22 Halted 0 ms 0 KB -