이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
using namespace std;
long long depth[100005], par[100005], ind[100005];
vector<pair<long long, long long> > adj[100005];
vector<long long> vec[100005], res;
void dfs(long long u, long long p)
{
par[u]=p;
for (long long i=0; i<adj[u].size(); i++)
{
long long v=adj[u][i].first, w=adj[u][i].second;
if (v==p)
continue;
depth[v]=depth[u]+1;
ind[v]=w;
dfs(v, u);
}
}
int main()
{
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
long long n, m, q;
cin >> n >> m >> q;
for (long long i=1; i<n; i++)
{
long long u, v;
cin >> u >> v;
adj[u].push_back({v, i});
adj[v].push_back({u, i});
}
for (long long i=1; i<=m; i++)
{
long long x, y;
cin >> x >> y;
vec[x].push_back(y);
}
dfs(1, 1);
for (long long i=1; i<=q; i++)
{
long long a, b, c, d, curA, curB, sum=0;
cin >> a >> b >> c >> d;
if (depth[a]<depth[b])
swap(a, b);
res.clear();
curA=a, curB=b;
for (long long j=1; j<=depth[a]-depth[b]; j++)
{
for (long long k=0; k<vec[ind[curA]].size(); k++)
res.push_back(vec[ind[curA]][k]);
curA=par[curA];
}
while (curA!=curB)
{
for (long long k=0; k<vec[ind[curA]].size(); k++)
res.push_back(vec[ind[curA]][k]);
curA=par[curA];
for (long long k=0; k<vec[ind[curB]].size(); k++)
res.push_back(vec[ind[curB]][k]);
curB=par[curB];
}
sort(res.begin(), res.end());
for (long long j=0; j<=res.size(); j++)
{
if (j<res.size() && sum+res[j]<=d)
sum+=res[j];
else
{
cout << max(-1LL, c-((long long)res.size()-j)) << '\n';
break;
}
}
}
}
컴파일 시 표준 에러 (stderr) 메시지
currencies.cpp: In function 'void dfs(long long int, long long int)':
currencies.cpp:9:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
9 | for (long long i=0; i<adj[u].size(); i++)
| ~^~~~~~~~~~~~~~
currencies.cpp: In function 'int main()':
currencies.cpp:50:34: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
50 | for (long long k=0; k<vec[ind[curA]].size(); k++)
| ~^~~~~~~~~~~~~~~~~~~~~~
currencies.cpp:56:34: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
56 | for (long long k=0; k<vec[ind[curA]].size(); k++)
| ~^~~~~~~~~~~~~~~~~~~~~~
currencies.cpp:59:34: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
59 | for (long long k=0; k<vec[ind[curB]].size(); k++)
| ~^~~~~~~~~~~~~~~~~~~~~~
currencies.cpp:64:30: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
64 | for (long long j=0; j<=res.size(); j++)
| ~^~~~~~~~~~~~
currencies.cpp:66:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
66 | if (j<res.size() && sum+res[j]<=d)
| ~^~~~~~~~~~~
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