제출 #88896

#제출 시각UTC-0아이디문제언어결과실행 시간메모리
888962018-12-09 18:39:13sailormoon새로운 문제 (POI13_luk)C++14
0 / 100
404 ms34328 KiB
#include <string>
#include <algorithm>
#include <iostream>
#include <vector>
using namespace std;
int canHandle(int crs, int v);
vector<vector<int>> graph (1000001); // size
bool visited[1000001];
int main() {
int n, a, b, start = 0, midpoint, end, cities; // n -> towns, a -> from, b -> to
scanf("%d", &n);
end = n; // last point
for (int i = 0; i < n - 1; i++) {
scanf("%d %d", &a, &b);
graph[a].push_back(b);
graph[b].push_back(a);
}
// binary search for sufficient amount of crews
while (start < end) {
midpoint = (start + end) / 2;
for (int i = 0; i < n; i++) visited[i] = false; // clear array
if (canHandle(midpoint, 1) == 0) end = midpoint;
else start = midpoint + 1;
}
printf("%d\n", start);
 
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컴파일 시 표준 에러 (stderr) 메시지

luk.cpp: In function 'int main()':
luk.cpp:13:44: warning: unused variable 'cities' [-Wunused-variable]
     int n, a, b, start = 0, midpoint, end, cities; // n -> towns, a -> from, b -> to
                                            ^~~~~~
luk.cpp:14:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
luk.cpp:18:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &a, &b);
         ~~~~~^~~~~~~~~~~~~~~~~
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