oj.uz

Submission #889945

# Submission time Handle Problem Language Result Execution time Memory
889945 2023-12-20T10:08:02 Z abcvuitunggio Towns (IOI15_towns) C++17
25 / 100
 12 ms 532 KB 
#include "towns.h"
#include <bits/stdc++.h>
using namespace std;
int dist[111][111];
int d(int u, int v){
    if (u==v)
        return 0;
    if (u>v)
        swap(u,v);
    if (dist[u][v])
        return dist[u][v];
    return dist[u][v]=getDistance(u,v);
}
int hubDistance(int N, int sub){
    memset(dist,0,sizeof(dist));
    pair <int, int> mx={0,-1};
    for (int i=0;i<N;i++)
        mx=max(mx,{d(0,i),i});
    int u=mx.second;
    mx={0,-1};
    for (int i=0;i<N;i++)
        mx=max(mx,{d(u,i),i});
    int v=mx.second;
	int R=1e9,ch=1,cnt[2]={0,0};
	for (int i=0;i<N;i++)
        R=min(R,abs(d(i,u)-d(i,v)));
	R=(R+d(u,v))/2;
  	vector <int> a,b;
    for (int i=0;i<N;i++){
        int val=d(i,u)-d(i,v);
        if (val<-R)
            cnt[0]++;
        if (val==-R)
            a.push_back(i);
        if (val==R)
            b.push_back(i);
        if (val>R)
            cnt[1]++;
    }
    for (int i=0;i<2;i++)
        if (cnt[i]>N/2)
            ch=-1;
	if (a.size()>N/2||b.size()>N/2)
		ch=-1;
	return R*ch;
}

Compilation message

towns.cpp: In function 'int hubDistance(int, int)':
towns.cpp:40:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   40 |     for (int i=0;i<2;i++)
      |     ^~~
towns.cpp:43:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   43 |  if (a.size()>N/2||b.size()>N/2)
      |  ^~
towns.cpp:43:14: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   43 |  if (a.size()>N/2||b.size()>N/2)
      |      ~~~~~~~~^~~~
towns.cpp:43:28: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   43 |  if (a.size()>N/2||b.size()>N/2)
      |                    ~~~~~~~~^~~~
towns.cpp:14:28: warning: unused parameter 'sub' [-Wunused-parameter]
   14 | int hubDistance(int N, int sub){
      |                        ~~~~^~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 348 KB Output is correct
2 Correct 8 ms 524 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 11 ms 532 KB Output is correct
5 Correct 12 ms 348 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 344 KB Output is correct
2 Correct 8 ms 348 KB Output is correct
3 Correct 12 ms 532 KB Output is correct
4 Correct 12 ms 348 KB Output is correct

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 8 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 11 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 39.0

# Verdict Execution time Memory Grader output
1 Incorrect 11 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -