Submission #286333

#	Time	Username	Problem	Language	Result	Execution time	Memory
286333		evpipis	Towns (IOI15_towns)	C++11	25 / 100	24 ms	896 KiB

towns

#include "towns.h"
#include <bits/stdc++.h>
using namespace std;

#define mp make_pair
typedef pair<int, int> ii;

const int len = 115;
map<ii, int> mym;
int disa[len], disb[len];

int ask(int a, int b){
    if (a > b)
        swap(a, b);
    if (mym.count(mp(a, b)))
        return mym[mp(a, b)];
    return mym[mp(a, b)] = getDistance(a, b);
}

int hubDistance(int n, int sub) {
    mym.clear();

	int a = 0, b = 0;
	for (int i = 0; i < n; i++)
        if (ask(a, i) > ask(a, b))
            b = i;
    for (int i = 0; i < n; i++)
        if (ask(i, b) > ask(a, b))
            a = i;

    int R = ask(a, b);
    for (int c = 0; c < n; c++){
        disa[c] = (ask(a, b)+ask(a, c)-ask(b, c))/2;
        disb[c] = ask(a, b)-disa[c];

        R = min(R, max(disa[c], disb[c]));
    }

	return R;
}

Compilation message (stderr)

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:20:28: warning: unused parameter 'sub' [-Wunused-parameter]
   20 | int hubDistance(int n, int sub) {
      |                        ~~~~^~~

• Subtask 1: 13 / 13
• Subtask 2: 12 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 10
• Subtask 5: 0 / 13
• Subtask 6: 0 / 39