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답안 #389081

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
389081 2021-04-13T15:27:46 Z mosiashvililuka Boat (APIO16_boat) C++14
36 / 100
 34 ms 25356 KB 
#include<bits/stdc++.h>
using namespace std;
long long a,b,c,d,e,i,j,ii,jj,zx,xc,mod=1000000007LL,sub1,f[509],DPI[509],pas,li,dp[1509],dpp[1509],dp2[1509][509],dpp2[1509][509],fct[509],C[1509][509],len[1509],wu[1509];
pair <long long, long long> p[509],l[5009];
map <long long, long long> m,n;
map <long long, long long>::iterator it,tt;
long long xar(long long q, long long w){
	if(w==0) return 1LL;
	long long qw=xar(q,w/2);
	if(w%2==0) return (qw*qw)%mod; else return ((qw*qw)%mod*q)%mod;
}
long long dv(long long q, long long w){
	return (q*xar(w,mod-2))%mod;
}
int main(){
	ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
	cin>>a;
	for(i=1; i<=a; i++){
		cin>>p[i].first>>p[i].second;
		if(p[i].first!=p[i].second){
			sub1=1;
		}
	}
	if(sub1==0){
		DPI[a]=1;
		for(i=a-1; i>=1; i--){
			for(j=i+1; j<=a; j++){
				if(p[j].first>p[i].first){
					DPI[i]+=DPI[j];
					if(DPI[i]>=mod) DPI[i]-=mod;
				}
			}
			DPI[i]++;
			if(DPI[i]>=mod) DPI[i]-=mod;
		}
		for(i=1; i<=a; i++){
			pas+=DPI[i];
			if(pas>=mod) pas-=mod;
		}
		cout<<pas;
		return 0;
	}
	for(i=1; i<=a; i++){
		m[p[i].first]=1;
		m[p[i].second]=1;
	}
	
	for(it=m.begin(); it!=m.end(); it++){
		li++;
		l[li].first=(*it).first;
		l[li].second=(*it).first;
		tt=it;tt++;
		if(tt!=m.end()&&(*it).first+1<=(*tt).first-1){
			li++;
			l[li].first=(*it).first+1;
			l[li].second=(*tt).first-1;
		}
	}
	/*cout<<li<<endl;
	for(i=1; i<=li; i++){
		cout<<l[i].first<<" "<<l[i].second<<endl;
	}*/
	for(i=1; i<=li; i++){
		n[l[i].first]=l[i].second;
	}
	for(i=1; i<=li; i++){
		len[i]=l[i].second-l[i].first+1;
		C[i][0]=1;
		for(j=1; j<=min(a,len[i]); j++){
			zx=dv(len[i]-j+1,j);
			C[i][j]=(C[i][j-1]*zx)%mod;
			//cout<<len[i]<<" "<<j<<"  "<<C[i][j]<<endl;
		}
	}
	for(ii=a; ii>=1; ii--){
		for(i=0; i<=li+2; i++){
			dpp[i]=dp[i];
			for(j=0; j<=a+2; j++){
				dpp2[i][j]=dp2[i][j];
			}
		}
		for(i=1; i<=li; i++){
			if(l[i].second<p[ii].first||l[i].first>p[ii].second) continue;
			wu[i]++;
			for(j=i+1; j<=li; j++){
				/*dpp[i]+=dp[j]*len[i];
				dpp[i]%=mod;*/
				dpp2[i][1]+=dp[j];
				if(dpp2[i][1]>=mod) dpp2[i][1]-=mod;
			}
			dpp2[i][1]++;
			if(dpp2[i][1]>=mod) dpp2[i][1]-=mod;
			for(j=1; j<wu[i]; j++){
				dpp2[i][j+1]+=dp2[i][j];
				if(dpp2[i][j+1]>=mod) dpp2[i][j+1]-=mod;
			}
			dpp[i]=0;
			for(j=1; j<=wu[i]; j++){
				//if(j>len[i]) break;
				dpp[i]+=dpp2[i][j]*C[i][j];
				//if(dpp[i]>=mod) dpp[i]-=mod;
				dpp[i]%=mod;
			}
		}
		for(i=1; i<=li; i++){
			dp[i]=dpp[i];
			for(j=0; j<=a+2; j++){
				dp2[i][j]=dpp2[i][j];
			}
		}
/*		for(i=1; i<=li; i++) cout<<dp[i]<<" ";
		cout<<endl;*/
	}
	//cout<<dp2[2][1]<<endl;
	
	pas=0;
	for(i=1; i<=li; i++){
		pas+=dp[i];
		if(pas>=mod) pas-=mod;
	}
	cout<<pas;
	return 0;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct

Subtask #2
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Runtime error 25 ms 25356 KB Execution killed with signal 11
22 Halted 0 ms 0 KB -

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 33 ms 5068 KB Output is correct
2 Correct 29 ms 5168 KB Output is correct
3 Correct 30 ms 5144 KB Output is correct
4 Correct 32 ms 5068 KB Output is correct
5 Correct 29 ms 5068 KB Output is correct
6 Correct 33 ms 5068 KB Output is correct
7 Correct 34 ms 5144 KB Output is correct
8 Correct 33 ms 5064 KB Output is correct
9 Correct 33 ms 5068 KB Output is correct
10 Correct 33 ms 5164 KB Output is correct
11 Correct 28 ms 5076 KB Output is correct
12 Correct 26 ms 5112 KB Output is correct
13 Correct 27 ms 5068 KB Output is correct
14 Correct 29 ms 5156 KB Output is correct
15 Correct 27 ms 5148 KB Output is correct
16 Correct 11 ms 2448 KB Output is correct
17 Correct 11 ms 2380 KB Output is correct
18 Correct 11 ms 2380 KB Output is correct
19 Correct 10 ms 2380 KB Output is correct
20 Correct 11 ms 2536 KB Output is correct

Subtask #4
0 / 42.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Runtime error 25 ms 25356 KB Execution killed with signal 11
22 Halted 0 ms 0 KB -