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;
const int maxn = 200000 + 12, sq = 100;
int n, m, dp[maxn], best[maxn];
vector <int> bconn[maxn], now;
vector <pair<int, int>> pos[maxn];
bitset <maxn> marked;
int main(){
ios_base::sync_with_stdio(false), cin.tie(0);
int q;
cin >> n >> m >> q;
for(int i = 0; i < m; i++){
int a, b;
cin >> a >> b;
bconn[b].push_back(a);
}
for(int i = 1; i <= n; i++){
pos[i].push_back(make_pair(0, i));
marked = 0;
for(int j: bconn[i]){
for(auto q: pos[j]){
best[q.second] = max(best[q.second], q.first + 1);
marked[q.second] = 1;
}
}
for(int j: bconn[i])
for(auto q: pos[j]){
if(!marked[q.second])
continue;
// cout << i << ' ' << j << endl;
pos[i].push_back(make_pair(best[q.second], q.second));
// cout << pos[i].back().first << ' ' << pos[i].back().second << endl;
marked[q.second] = 0;
best[q.second] = 0;
}
sort(pos[i].begin(), pos[i].end(), greater<pair<int, int>>());
while(pos[i].size() > sq)
pos[i].pop_back();
// for(auto j: pos[i])
// cout << i << ' ' << j.second << ' ' << j.first << endl;
// cout << endl;
}
for(int i = 0; i < q; i++){
int st, len;
cin >> st >> len;
now.clear();
for(int i = 0; i < len; i++){
int a;
cin >> a;
now.push_back(a);
marked[a] = 1;
}
if(len < sq){
int ans = -1;
for(int i = 0; i < pos[st].size() && ans == -1; i++)
if(!marked[pos[st][i].second])
ans = pos[st][i].first;
cout << ans << "\n";
}
else{
// cout << 'g' << endl;
for(int i = 1; i <= st; i++){
dp[i] = -maxn;
if(!marked[i] && i != st)
dp[i] = 0;
for(int j: bconn[i])
dp[i] = max(dp[i], dp[j] + 1);
// cout << i << ' ' << dp[i] << endl;
}
if(dp[st] < 0)
dp[st] = -1;
cout << dp[st] << "\n";
}
for(int a: now)
marked[a] = 0;
}
}
컴파일 시 표준 에러 (stderr) 메시지
bitaro.cpp: In function 'int main()':
bitaro.cpp:60:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
60 | for(int i = 0; i < pos[st].size() && ans == -1; i++)
| ~~^~~~~~~~~~~~~~~~
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