Submission #1029668

#	Time	Username	Problem	Language	Result	Execution time	Memory
1029668		sleepntsheep	Towns (IOI15_towns)	C11	13 / 100	10 ms	928 KiB

towns

#include "towns.h"

int z;

int l(int i, int j){return i<j?i:j;}
int h(int i, int j){return i>j?i:j;}
int ask(int i, int j) { return i-j ? getDistance(i, j): 0; }

int argmax(int x, int N) {
    int mx = 0, dist = -1;
    for (int y, i = 0; i < N; ++i)
        if (dist < (y = ask(x, i)))
            dist = y, mx = i, z = dist;
    return mx;
}

int hubDistance(int N, int sub) {
    int d1 = argmax(0, N);
    int d2 = argmax(d1, N);
    int dd = z;

    int R = 1e9;
    for (int i = 0; i < N; ++i) {
        if (d1 == i || d2 == i)
            continue;
        int a=ask(d1,i),b=ask(d2,i);
        int branch = (a+b-dd)/2;

        R=l(R,h(a,b)-branch);
    }

    return R;
}

Compilation message (stderr)

towns.c: In function 'hubDistance':
towns.c:17:28: warning: unused parameter 'sub' [-Wunused-parameter]
   17 | int hubDistance(int N, int sub) {
      |                        ~~~~^~~

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