oj.uz

답안 #835185

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
835185 2023-08-23T10:02:04 Z Antekb Chorus (JOI23_chorus) C++17
87 / 100
 415 ms 35108 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<<17;
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=-1e10, r=1e10;
	pair<int, ll> L,R;
	for(int ii=0; ii<60; 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 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 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 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 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 212 KB Output is correct
18 Correct 2 ms 340 KB Output is correct
19 Correct 2 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 2 ms 340 KB Output is correct
23 Correct 0 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 0 ms 340 KB Output is correct
26 Correct 2 ms 340 KB Output is correct
27 Correct 2 ms 340 KB Output is correct
28 Correct 1 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 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 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 212 KB Output is correct
18 Correct 2 ms 340 KB Output is correct
19 Correct 2 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 2 ms 340 KB Output is correct
23 Correct 0 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 0 ms 340 KB Output is correct
26 Correct 2 ms 340 KB Output is correct
27 Correct 2 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 14 ms 720 KB Output is correct
30 Correct 16 ms 596 KB Output is correct
31 Correct 16 ms 596 KB Output is correct
32 Correct 1 ms 596 KB Output is correct
33 Correct 3 ms 596 KB Output is correct
34 Correct 13 ms 596 KB Output is correct
35 Correct 1 ms 720 KB Output is correct
36 Correct 6 ms 596 KB Output is correct
37 Correct 20 ms 596 KB Output is correct
38 Correct 13 ms 596 KB Output is correct
39 Correct 17 ms 596 KB Output is correct
40 Correct 8 ms 596 KB Output is correct
41 Correct 8 ms 596 KB Output is correct
42 Correct 8 ms 596 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 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 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 212 KB Output is correct
18 Correct 2 ms 340 KB Output is correct
19 Correct 2 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 2 ms 340 KB Output is correct
23 Correct 0 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 0 ms 340 KB Output is correct
26 Correct 2 ms 340 KB Output is correct
27 Correct 2 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 14 ms 720 KB Output is correct
30 Correct 16 ms 596 KB Output is correct
31 Correct 16 ms 596 KB Output is correct
32 Correct 1 ms 596 KB Output is correct
33 Correct 3 ms 596 KB Output is correct
34 Correct 13 ms 596 KB Output is correct
35 Correct 1 ms 720 KB Output is correct
36 Correct 6 ms 596 KB Output is correct
37 Correct 20 ms 596 KB Output is correct
38 Correct 13 ms 596 KB Output is correct
39 Correct 17 ms 596 KB Output is correct
40 Correct 8 ms 596 KB Output is correct
41 Correct 8 ms 596 KB Output is correct
42 Correct 8 ms 596 KB Output is correct
43 Correct 198 ms 3404 KB Output is correct
44 Correct 367 ms 7064 KB Output is correct
45 Correct 342 ms 5464 KB Output is correct
46 Correct 13 ms 7256 KB Output is correct
47 Correct 17 ms 7244 KB Output is correct
48 Correct 241 ms 7272 KB Output is correct
49 Correct 9 ms 5464 KB Output is correct
50 Correct 75 ms 7256 KB Output is correct
51 Correct 217 ms 7272 KB Output is correct
52 Correct 10 ms 5464 KB Output is correct
53 Correct 253 ms 7272 KB Output is correct
54 Correct 415 ms 7256 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 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 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 212 KB Output is correct
18 Correct 2 ms 340 KB Output is correct
19 Correct 2 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 2 ms 340 KB Output is correct
23 Correct 0 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 0 ms 340 KB Output is correct
26 Correct 2 ms 340 KB Output is correct
27 Correct 2 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 14 ms 720 KB Output is correct
30 Correct 16 ms 596 KB Output is correct
31 Correct 16 ms 596 KB Output is correct
32 Correct 1 ms 596 KB Output is correct
33 Correct 3 ms 596 KB Output is correct
34 Correct 13 ms 596 KB Output is correct
35 Correct 1 ms 720 KB Output is correct
36 Correct 6 ms 596 KB Output is correct
37 Correct 20 ms 596 KB Output is correct
38 Correct 13 ms 596 KB Output is correct
39 Correct 17 ms 596 KB Output is correct
40 Correct 8 ms 596 KB Output is correct
41 Correct 8 ms 596 KB Output is correct
42 Correct 8 ms 596 KB Output is correct
43 Correct 198 ms 3404 KB Output is correct
44 Correct 367 ms 7064 KB Output is correct
45 Correct 342 ms 5464 KB Output is correct
46 Correct 13 ms 7256 KB Output is correct
47 Correct 17 ms 7244 KB Output is correct
48 Correct 241 ms 7272 KB Output is correct
49 Correct 9 ms 5464 KB Output is correct
50 Correct 75 ms 7256 KB Output is correct
51 Correct 217 ms 7272 KB Output is correct
52 Correct 10 ms 5464 KB Output is correct
53 Correct 253 ms 7272 KB Output is correct
54 Correct 415 ms 7256 KB Output is correct
55 Runtime error 55 ms 35108 KB Execution killed with signal 11
56 Halted 0 ms 0 KB -