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답안 #835192

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
835192 2023-08-23T10:08:03 Z Antekb Chorus (JOI23_chorus) C++17
87 / 100
 7000 ms 69892 KB 
#include<bits/stdc++.h>
#define st first
#define nd second
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define eb emplace_back
#define pp pop_back
#define mp make_pair
using namespace std;
using pii = pair<int, int>;
using ll = long long;
using vi = vector<int>;
using vii = vector<pii>;
using ld = long double;
void debug(){cerr<<"\n";}
template<typename H, typename... T>
void debug(H h, T... t){
	cerr<<h;
	if(sizeof...(t)){
		cerr<<", ";
	}
	debug(t...);
}
#define deb(x...) cerr<<#x<<" = ";debug(x);

mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
const int N=1<<20;
ld dp[N], ile[N];
int main(){
	int n, k;
	string s;
	cin>>n>>k>>s;
	ll res=0;
	vi V(n+1), pocz(n+1);
	vector<ll> sum={0};
	int a=0, b=1;
	for(char c:s){
		if(c=='A'){
			a++;
			pocz[a]=min(b, a)-1;
		}
		else{
			res+=max(0, b-a);
			V[b]=max(a, b);
			sum.pb(V[b]+sum.back());
			b++;
		}
	}
	deb(res);
	for(int i=1; i<=n; i++){
		//deb(i, V[i], pocz[i], sum[i]);
	}
	/*vector<vector<ll> > dp2(n+1, vector<ll>(k+1, 1e18));
	dp2[0][0]=0;
	for(int kk=1; kk<=k; kk++){
		for(int i=kk; i<=n; i++){
			ll c=0;
			for(int j=i-1; j>=0; j--){
				c+=max(0, i-V[j+1]);
				dp2[i][kk]=min(dp2[i][kk], dp2[j][kk-1]+c);
			}
		}
	}
	for(int kk=1; kk<=k; kk++){
		cout<<dp2[n][kk]<<" ";
	}*/
	ld l=-2e12, r=2e12;
	pair<int, ll> L,R;
	for(int ii=0; ii<100; ii++){
		ld m=(l+r)/2;
		dp[0]=0;
		ile[0]=0;
		deque<pair<ld, int> > V2;
		deque<int> tim;
		V2.eb(dp[0], 0);
		deb(m);
		for(int i=1; i<=n; i++){
			for(int j=pocz[i-1]+1; j<=pocz[i]; j++){
				ld A=dp[j]+sum[j];
				int B=-j;
				//deb(A, B);
				while(V2.size() && A<=V2.back().st){
					V2.pp();
					if(tim.size())tim.pp();
				}
				if(V2.empty()){
					V2.eb(A, B);
					continue;
				}
				ll t=ceil((A-V2.back().st)/(V2.back().nd-B))+1e-9;
				//deb(t);
				while(V2.size()>=2){
					if(t<=tim.back()){
						V2.pp();
						tim.pp();
						t=ceil((A-V2.back().st)/(V2.back().nd-B))+1e-9;
					}
					else break;
				}
				//if(t<=n){
				V2.eb(A,B);
				tim.pb(min(t, ll(n+1)));
				//}
			}
			while(tim.size() && tim.front()<=i){
				tim.pop_front();
				V2.pop_front();
			}
			dp[i]=V2.front().st+i*1ll*V2.front().nd+pocz[i]*1ll*i-sum[pocz[i]];
			ile[i]=ile[-V2.front().nd]+1;
			if(dp[i]>dp[i-1]){
				dp[i]=dp[i-1];
				ile[i]=ile[i-1]+1;
			}
			if(dp[i]>dp[pocz[i]]){
				dp[i]=dp[pocz[i]];
				ile[i]=ile[pocz[i]]+1;
			}
			dp[i]+=m;
			//deb(i, dp[i]);
		}
		/*int opt=0;
		//deb(m);
		for(int i=1; i<=n; i++){
			ll c=0;
			//dp[i]=1e18;
			//deb(i);
			if(i>1 && opt==0)opt++;
			ll c2=0;
			if(pocz[i]>opt)c2=(pocz[i]-opt)*1ll*i-sum[pocz[i]]+sum[opt];
			//dp[opt]+sum[opt]-opt*i dla opt<=pocz[i]
			//czyli jesli opt<opt2 i f(opt)>f(opt2) to zawsze pozniej bedzie
			//wiec i bedzie lepsze od i-1 od pewnego momentu
			//mozemy wrzucic wszystko na vector
			/*while(opt<i-1){
				ll c3=0;
				if(pocz[i]>opt+1)c3=(pocz[i]-opt-1)*1ll*i-sum[pocz[i]]+sum[opt+1];
				if(dp[opt]+c2>=dp[opt+1]+c3){
					opt++;
					c2=c3;
				}
				else break;
			}*/
			/*
			//if(dp[i]>dp[opt]+c2+m){
				dp[i]=dp[opt]+c2+m;
				ile[i]=ile[opt]+1;
			//}
			c2=0;
			if(pocz[i]>0)c2=pocz[i]*1ll*i-sum[pocz[i]];
			if(dp[i]>dp[0]+c2+m){
				dp[i]=dp[0]+c2+m;
				ile[i]=ile[0]+1;
			}
			deb(i, opt, dp[i], pocz[i]);
			for(int j=i-1; j>=0; j--){
				c+=max(0, i-V[j+1]);
				c2=0;
				if(pocz[i]>j)c2=(pocz[i]-j)*1ll*i-sum[pocz[i]]+sum[j];
				deb(i, j, dp[i], dp[j]+c+m);
				assert(c==c2);
				//deb(j, dp[j], dp[j]+c+m);
			}
			c=0;
			ld x=1e18;
			for(int j=i-1; j>=0; j--){
				c+=max(0, i-V[j+1]);
				c2=0;
				if(pocz[i]>j)c2=(pocz[i]-j)*1ll*i-sum[pocz[i]]+sum[j];
				//deb(i, j, dp[i], dp[j]+c+m);
				assert(c==c2);
				//deb(j, dp[j], dp[j]+c+m);
				if(x>dp[j]+c+m){
					x=dp[j]+c+m;
					//ile[i]=ile[j]+1;
				}
			}
			assert(x==dp[i]);
		}*/
		if(ile[n]>k){
			l=m;
			R=mp(ile[n], ll(dp[n]-k*m+0.5));
		}
		else if(ile[n]<k){
			r=m;
			L=mp(ile[n], ll(dp[n]-k*m+0.5));
		}
		else{
			cout<<res+ll(dp[n]-k*m+0.5);
			return 0;
		}
	}
	assert((R.nd*(k-L.st)+L.nd*(R.st-k))%(R.st-L.st)==0);
	ll ans=(R.nd*(k-L.st)+L.nd*(R.st-k))/(R.st-L.st);
	cout<<ans+res;
	//assert(false);
}

Compilation message

chorus.cpp:135:4: warning: "/*" within comment [-Wcomment]
  135 |    /*while(opt<i-1){
      |

Subtask #1
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 304 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 312 KB Output is correct
8 Correct 1 ms 308 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 312 KB Output is correct
11 Correct 1 ms 312 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 316 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 304 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 312 KB Output is correct
8 Correct 1 ms 308 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 312 KB Output is correct
11 Correct 1 ms 312 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 316 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 2 ms 308 KB Output is correct
18 Correct 4 ms 340 KB Output is correct
19 Correct 3 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 4 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 2 ms 308 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 3 ms 340 KB Output is correct
27 Correct 2 ms 340 KB Output is correct
28 Correct 2 ms 340 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 304 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 312 KB Output is correct
8 Correct 1 ms 308 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 312 KB Output is correct
11 Correct 1 ms 312 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 316 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 2 ms 308 KB Output is correct
18 Correct 4 ms 340 KB Output is correct
19 Correct 3 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 4 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 2 ms 308 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 3 ms 340 KB Output is correct
27 Correct 2 ms 340 KB Output is correct
28 Correct 2 ms 340 KB Output is correct
29 Correct 22 ms 664 KB Output is correct
30 Correct 28 ms 596 KB Output is correct
31 Correct 28 ms 616 KB Output is correct
32 Correct 1 ms 596 KB Output is correct
33 Correct 4 ms 596 KB Output is correct
34 Correct 21 ms 596 KB Output is correct
35 Correct 1 ms 568 KB Output is correct
36 Correct 7 ms 596 KB Output is correct
37 Correct 32 ms 596 KB Output is correct
38 Correct 22 ms 672 KB Output is correct
39 Correct 28 ms 596 KB Output is correct
40 Correct 10 ms 668 KB Output is correct
41 Correct 10 ms 664 KB Output is correct
42 Correct 14 ms 644 KB Output is correct

Subtask #4
26.0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 304 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 312 KB Output is correct
8 Correct 1 ms 308 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 312 KB Output is correct
11 Correct 1 ms 312 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 316 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 2 ms 308 KB Output is correct
18 Correct 4 ms 340 KB Output is correct
19 Correct 3 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 4 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 2 ms 308 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 3 ms 340 KB Output is correct
27 Correct 2 ms 340 KB Output is correct
28 Correct 2 ms 340 KB Output is correct
29 Correct 22 ms 664 KB Output is correct
30 Correct 28 ms 596 KB Output is correct
31 Correct 28 ms 616 KB Output is correct
32 Correct 1 ms 596 KB Output is correct
33 Correct 4 ms 596 KB Output is correct
34 Correct 21 ms 596 KB Output is correct
35 Correct 1 ms 568 KB Output is correct
36 Correct 7 ms 596 KB Output is correct
37 Correct 32 ms 596 KB Output is correct
38 Correct 22 ms 672 KB Output is correct
39 Correct 28 ms 596 KB Output is correct
40 Correct 10 ms 668 KB Output is correct
41 Correct 10 ms 664 KB Output is correct
42 Correct 14 ms 644 KB Output is correct
43 Correct 336 ms 3532 KB Output is correct
44 Correct 609 ms 7228 KB Output is correct
45 Correct 578 ms 5444 KB Output is correct
46 Correct 17 ms 7152 KB Output is correct
47 Correct 54 ms 7252 KB Output is correct
48 Correct 421 ms 7240 KB Output is correct
49 Correct 9 ms 5360 KB Output is correct
50 Correct 109 ms 7216 KB Output is correct
51 Correct 263 ms 7208 KB Output is correct
52 Correct 9 ms 5464 KB Output is correct
53 Correct 415 ms 7216 KB Output is correct
54 Correct 691 ms 7216 KB Output is correct

Subtask #5
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 304 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 312 KB Output is correct
8 Correct 1 ms 308 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 312 KB Output is correct
11 Correct 1 ms 312 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 316 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 2 ms 308 KB Output is correct
18 Correct 4 ms 340 KB Output is correct
19 Correct 3 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 4 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 2 ms 308 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 3 ms 340 KB Output is correct
27 Correct 2 ms 340 KB Output is correct
28 Correct 2 ms 340 KB Output is correct
29 Correct 22 ms 664 KB Output is correct
30 Correct 28 ms 596 KB Output is correct
31 Correct 28 ms 616 KB Output is correct
32 Correct 1 ms 596 KB Output is correct
33 Correct 4 ms 596 KB Output is correct
34 Correct 21 ms 596 KB Output is correct
35 Correct 1 ms 568 KB Output is correct
36 Correct 7 ms 596 KB Output is correct
37 Correct 32 ms 596 KB Output is correct
38 Correct 22 ms 672 KB Output is correct
39 Correct 28 ms 596 KB Output is correct
40 Correct 10 ms 668 KB Output is correct
41 Correct 10 ms 664 KB Output is correct
42 Correct 14 ms 644 KB Output is correct
43 Correct 336 ms 3532 KB Output is correct
44 Correct 609 ms 7228 KB Output is correct
45 Correct 578 ms 5444 KB Output is correct
46 Correct 17 ms 7152 KB Output is correct
47 Correct 54 ms 7252 KB Output is correct
48 Correct 421 ms 7240 KB Output is correct
49 Correct 9 ms 5360 KB Output is correct
50 Correct 109 ms 7216 KB Output is correct
51 Correct 263 ms 7208 KB Output is correct
52 Correct 9 ms 5464 KB Output is correct
53 Correct 415 ms 7216 KB Output is correct
54 Correct 691 ms 7216 KB Output is correct
55 Correct 3707 ms 33028 KB Output is correct
56 Correct 4499 ms 53164 KB Output is correct
57 Correct 5791 ms 53152 KB Output is correct
58 Correct 129 ms 69588 KB Output is correct
59 Correct 213 ms 69560 KB Output is correct
60 Correct 3917 ms 69688 KB Output is correct
61 Correct 87 ms 53280 KB Output is correct
62 Correct 785 ms 69724 KB Output is correct
63 Correct 2081 ms 69892 KB Output is correct
64 Correct 1597 ms 69640 KB Output is correct
65 Correct 4083 ms 69664 KB Output is correct
66 Execution timed out 7050 ms 69588 KB Time limit exceeded
67 Halted 0 ms 0 KB -