Submission #206682

#	Time	Username	Problem	Language	Result	Execution time	Memory
206682		PeppaPig	Computer Network (BOI14_network)	C++14	100 / 100	147 ms	4704 KiB

network

#include "network.h"
#include <bits/stdc++.h>

#define pii pair<int, int>
#define x first
#define y second

using namespace std;

const int N = 1e3+5;

map<pii, int> mp;

int get_dist(int a, int b) {
    if(a == b) return 0;
    else if(mp.count(pii(a, b))) return mp[pii(a, b)];
    else return mp[pii(a, b)] = mp[pii(b, a)] = ping(a, b) + 1;
}

int len;
vector<int> dist[N];

void findRoute (int n, int a, int b) {
    for(int i = 1; i <= n; i++) if(i != a) {
        int now = get_dist(a, i);
        dist[now].emplace_back(i);
        if(i == b) len = now;
    }
    vector<int> ans = { b };
    for(int i = len-1; i; i--) for(int x : dist[i])
        if(get_dist(ans.back(), x) == 1) {
            ans.emplace_back(x);
            break;
        }
    reverse(ans.begin(), ans.end());
    for(int x : ans) travelTo(x);
}

Compilation message (stderr)

grader.c: In function 'int main()':
grader.c:48:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf ("%d%d%d%d", &N, &a, &b, &M);
     ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
grader.c:51:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &distance[u][v]);
             ~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 25 / 25
• Subtask 2: 25 / 25
• Subtask 3: 25 / 25
• Subtask 4: 25 / 25