제출 #670179

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
670179		Astrayt	도시들 (IOI15_towns)	C++17	컴파일 에러	0 ms	0 KiB

towns

#include <bits/stdc++.h>
#include "towns.h"
using namespace std;
#define starburst ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define int long long
#define pii pair<int,int>
#define pb push_back

int dist[110][110];

int getDistance(int i, int j){
    return dist[i][j];
}

int hubDistance(int n, int sub){
    int LCC = 0;
    vector<vector<int>> D(n, vector<int>(n, 0));
    for(int i = 0; i < n; ++i) 
        for(int j = i + 1; j < n; ++j)
            D[i][j] = D[j][i] = getDistance(i, j);
    int lb = 0, R = 1e9;
    while(true){
        int mn = 1e9;
        pii pt;
        for(int i = 1; i < n; ++i){
            for(int j = i + 1; j < n; ++j){
                int k = (D[0][i] + D[0][j] - D[i][j]) / 2;
                if(k < mn && k > lb) mn = k, pt = make_pair(i, j);
            }
        }
        if(mn == 1e9) break;
        int r = mn;
        for(int i = 0, u = pt.first, v = pt.second; i < n; ++i){
            if(i == u || i == v) continue;
            int rr = D[u][i] + D[v][i] - D[u][v];
            rr /= 2;
            r = max(rr, r);
        }
        R = min(R, r);
        lb = mn;
    }
    return R;
}
/*
void solve(int sub){
    int n; cin >> n;
    for(int i = 0; i < n; ++i){
        for(int j = 0; j < n; ++j){
            cin >> dist[i][j];
        }
    }
    cout << hubDistance(n, sub) << '\n';
}

signed main(){
    starburst
    int t = 1, s; cin >> s >> t;
    while(t--) solve(s);
}*/

컴파일 시 표준 에러 (stderr) 메시지

towns.cpp: In function 'long long int hubDistance(long long int, long long int)':
towns.cpp:31:12: warning: conversion from 'long long int' to 'double' may change value [-Wconversion]
   31 |         if(mn == 1e9) break;
      |            ^~
towns.cpp:16:9: warning: unused variable 'LCC' [-Wunused-variable]
   16 |     int LCC = 0;
      |         ^~~
towns.cpp:15:28: warning: unused parameter 'sub' [-Wunused-parameter]
   15 | int hubDistance(int n, int sub){
      |                            ^
/usr/bin/ld: /tmp/cccL3Xws.o: in function `main':
grader.c:(.text.startup+0x83): undefined reference to `hubDistance(int, int)'
collect2: error: ld returned 1 exit status