oj.uz

Submission #97520

# Submission time Handle Problem Language Result Execution time Memory
97520 2019-02-16T17:04:55 Z tincamatei Dreaming (IOI13_dreaming) C++14
18 / 100
 69 ms 13816 KB 
#include "dreaming.h"
#include <bits/stdc++.h>

using namespace std;

const int MAX_N = 100000;
vector<pair<int, int> > graph[MAX_N];

int dist[MAX_N], papa[MAX_N], distpapa[MAX_N];
int diam[MAX_N], comp[MAX_N], top;
bool viz[MAX_N];

int calcDist(int nod, int p) {
	int rez = nod;
	viz[nod] = true;
	for(auto it: graph[nod]) {
		if(it.first != p) {
			dist[it.first] = dist[nod] + it.second;
			papa[it.first] = nod;
			distpapa[it.first] = it.second;
			int x = calcDist(it.first, nod);
			if(dist[x] >= dist[rez])
				rez = x;
		}
	}
	return rez;
}

int getFarthest(int nod) {
	int x;
	
	dist[nod] = 0;
	papa[nod] = -1;
	nod = calcDist(nod, -1);
	
	x = nod;
	int d = dist[nod];
	top = 0;

	while(nod != -1) {
		diam[top++] = d;
		d -= distpapa[nod];
		nod = papa[nod];
	}

	return x;
}

bool cmp(int a, int b) {
	return a > b;
}

int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
	int tc = 0;
	for(int i = 0; i < M; ++i) {
		graph[A[i]].push_back(make_pair(B[i], T[i]));
		graph[B[i]].push_back(make_pair(A[i], T[i]));
	}
	
	for(int i = 0; i < N; ++i) {
		if(!viz[i]) {
			int c1, c2;
			c1 = getFarthest(i);
			c2 = getFarthest(c1);
			
			comp[tc] = 1000000000;

			int d = diam[0];
			for(int i = 0; i < top; ++i)
				comp[tc] = min(comp[tc], max(diam[i], d - diam[i]));
			tc++;
		}
	}
	
	sort(comp, comp + tc, cmp);
	if(tc == 1)
		return comp[0];
	else if(tc == 2)
		return comp[0] + comp[1] + L;
	else {
		int rez = 2000000000;
		for(int i = 0; i < 3; ++i) {
			int xd[3], t = 1;
			xd[0] = comp[i];
			for(int j = 0; j < 3; ++j)
				if(i != j)
					xd[t++] = comp[j] + L;
			sort(xd, xd + t, cmp);
			rez = min(rez, xd[0] + xd[1]);
		}
		return rez;
	}
}

Compilation message

dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:62:12: warning: variable 'c2' set but not used [-Wunused-but-set-variable]
    int c1, c2;
            ^~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 69 ms 13816 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 69 ms 13816 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 69 ms 13816 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 6400 KB Output is correct
2 Correct 28 ms 6464 KB Output is correct
3 Correct 34 ms 6468 KB Output is correct
4 Correct 29 ms 6528 KB Output is correct
5 Correct 29 ms 6528 KB Output is correct
6 Correct 34 ms 6656 KB Output is correct
7 Correct 37 ms 6648 KB Output is correct
8 Correct 29 ms 6392 KB Output is correct
9 Correct 29 ms 6392 KB Output is correct
10 Correct 28 ms 6528 KB Output is correct
11 Correct 3 ms 2688 KB Output is correct
12 Correct 10 ms 4352 KB Output is correct
13 Correct 10 ms 4480 KB Output is correct
14 Correct 9 ms 4348 KB Output is correct
15 Correct 10 ms 4324 KB Output is correct
16 Correct 9 ms 4352 KB Output is correct
17 Correct 9 ms 4096 KB Output is correct
18 Correct 10 ms 4352 KB Output is correct
19 Correct 9 ms 4352 KB Output is correct
20 Correct 4 ms 2688 KB Output is correct
21 Correct 4 ms 2688 KB Output is correct
22 Correct 4 ms 2688 KB Output is correct
23 Correct 10 ms 4352 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 69 ms 13816 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 69 ms 13816 KB Output isn't correct
2 Halted 0 ms 0 KB -