oj.uz

Submission #105216

# Submission time Handle Problem Language Result Execution time Memory
105216 2019-04-11T02:52:13 Z bert30702 Ancient Books (IOI17_books) C++17
0 / 100
 77 ms 63224 KB 
#include <bits/stdc++.h>
#include "books.h"
#define pii pair<int, int>
#define F first
#define S second
using namespace std;
const int MX = 1e6 + 100;
int boss[MX], sz[MX];
int Find(int u) {
	return boss[u] == u ? u : boss[u] = Find(boss[u]);
}
void merge(int a, int b) {
	a = Find(a), b = Find(b);
	if(a == b) return;
	boss[a] = b;
	sz[b] += sz[a];
}
priority_queue<int> pq[MX];
int G[MX];
long long minimum_walk(vector<int> p, int s) {
	int n = p.size();
	long long sum = 0, cnt = 0;
	for(int i = 0; i < n; i ++) {
		boss[i] = i;
		sz[i] = 1;
		cnt += (i != s and p[i] == i);
		G[p[i]] = max(G[p[i]], i);
		G[i]    = max(G[i], p[i]);
	}
	for(int i = 0; i < n; i ++) sum += abs(i - p[i]), merge(i, p[i]);
	vector<pair<int, pii> > E;
	for(int i = 0; i + 1 < n; i ++) {
		if(p[i] == i and i != s) continue;
		if(Find(i) == Find(i + 1)) continue;
		int ptr = i + 1, mx = i;
		while(ptr <= G[i] or (ptr != s and ptr < n and p[ptr] == ptr)) {
			if(ptr <= G[i]) mx = ptr;
			if(p[ptr] == ptr) cnt --;
			G[i] = max(G[i], G[ptr]);
			merge(i, ptr);
			ptr ++;
		}
		if(ptr < n) E.push_back({ptr - mx, {i, ptr}});
		i = ptr - 1;
	}
	sort(E.begin(), E.end());
	for(auto it: E) {
		if(Find(it.S.F) != Find(it.S.S)) {
			merge(it.S.F, it.S.S);
			sum += 2 * it.F;
		}
	}
	assert(p[0] != 0);
	assert(sz[Find(s)] + cnt == n);
	return sum;
}
//main () {
//	cout << minimum_walk({2, 3, 0, 1}, 0);
//}

Subtask #1
0 / 12.0

# Verdict Execution time Memory Grader output
1 Runtime error 77 ms 63224 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 77 ms 63224 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Runtime error 77 ms 63224 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 33 ms 31736 KB 3rd lines differ - on the 1st token, expected: '3304', found: '2744'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Runtime error 77 ms 63224 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -