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Submission #1083208

# Submission time Handle Problem Language Result Execution time Memory
1083208 2024-09-02T18:08:35 Z Math4Life2020 Ancient Books (IOI17_books) C++17
0 / 100
 1 ms 348 KB 
#include <bits/stdc++.h>
using namespace std;

using ll = long long; using pii = pair<ll,ll>;
const ll INF = 1e8;

ll minimum_walk(vector<int> p, int s) {
	ll N = p.size();
	ll flux[N];
	for (ll i=0;i<N;i++) {
		flux[i]=0;
	}
	for (ll i=0;i<N;i++) {
		if (p[i]>i) {
			flux[i]++;
			flux[p[i]]--;
		}
	}
	ll pf[N+1];
	pf[0]=0;
	for (ll i=0;i<N;i++) {
		pf[i+1]=pf[i]+flux[i];
		//cout << "x="<<(i+1)<<", pf[x]="<<pf[i+1]<<"\n";
	}
	ll maxl[N+1]; ll minl[N+1];
	for (ll i=0;i<=N;i++) {
		maxl[i]=-INF;
		minl[i]=INF;
	}
	for (ll i=1;i<=N;i++) {
		maxl[pf[i]]=max(maxl[pf[i]],i);
		minl[pf[i]]=min(minl[pf[i]],i-1);
	}
	ll xc = 0;
	ll ans = 0;
	for (ll i=1;i<=N;i++) {
		if (minl[i]!=INF) {
			/*ans += abs(xc-minl[i]);
			xc = minl[i];
			ans += abs(xc-maxl[i]);
			xc = maxl[i];*/
			ans += 2*(maxl[i]-minl[i]);
		}
	}
	//ans += abs(xc);
	return ans;
}

/*int main() {
	vector<int> p1 = {5,4,3,2,1,0};
	cout << minimum_walk(p1,0);
}*/

Compilation message

books.cpp: In function 'll minimum_walk(std::vector<int>, int)':
books.cpp:34:5: warning: unused variable 'xc' [-Wunused-variable]
   34 |  ll xc = 0;
      |     ^~

Subtask #1
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB 3rd lines differ - on the 1st token, expected: '6', found: '4'
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB 3rd lines differ - on the 1st token, expected: '6', found: '4'
2 Halted 0 ms 0 KB -

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB 3rd lines differ - on the 1st token, expected: '6', found: '4'
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 348 KB 3rd lines differ - on the 1st token, expected: '3304', found: '5898'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB 3rd lines differ - on the 1st token, expected: '6', found: '4'
2 Halted 0 ms 0 KB -