이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <iostream>
#include <vector>
#include <algorithm>
#include <queue>
#include <set>
#define upmax(a, b) a = max(a, b);
#define upmin(a, b) a = min(a, b);
#define pr(x) cout << x << endl;
#define wpr(x) cout << #x << ": " << x << endl;
#define rep(i, s, e) for(ll i = s; i < e; i++)
#define rep(i, e) for(ll i = 0; i < e; i++)
using namespace std;
using ll = unsigned short int;
using vll = vector<ll>;
using vvll = vector<vll>;
using vvvll = vector<vvll>;
using vb = vector<bool>;
using vvb = vector<vb>;
using pll = pair<ll, ll>;
const ll inf = 5e4;
ll n, m;
vvll d, have; // [place][sky ind]
vll s, p;
vb vis;
void bfs()
{
deque<pll> q; // {place, sky ind}
q.push_front({ s[0], 0 });
d[s[0]][0] = 0;
while (!q.empty()) {
ll b = q.front().first;
ll ind = q.front().second;
//wpr(b);
//wpr(ind);
//cout << "dist: " << d[b][ind] << endl;
q.pop_front();
if (!vis[b]) {
rep(i, have[b].size()) {
if (d[b][have[b][i]] != inf) continue;
d[b][have[b][i]] = d[b][ind];
q.push_front({ b, have[b][i] });
}
vis[b] = true;
}
//have[b].clear();
ll jump = p[ind];
if (b - jump >= 0 && d[b-jump][ind] == inf) {
d[b - jump][ind] = d[b][ind] + 1;
q.push_back({ b - jump, ind });
}
if (b + jump < n && d[b + jump][ind] == inf) {
d[b + jump][ind] = d[b][ind] + 1;
q.push_back({ b + jump, ind });
}
}
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
cin >> n >> m;
s.resize(m);
p.resize(m);
have.resize(n);
rep(i, m) {
cin >> s[i] >> p[i];
have[s[i]].push_back(i);
}
d.resize(n, vll(m, inf));
vis.resize(n, false);
bfs();
ll ans = d[s[1]][1];
if (ans == inf) {
pr("-1");
}
else pr(ans);
}
/*
5 3
0 2
1 1
4 1
*/
컴파일 시 표준 에러 (stderr) 메시지
skyscraper.cpp:12: warning: "rep" redefined
12 | #define rep(i, e) for(ll i = 0; i < e; i++)
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skyscraper.cpp:11: note: this is the location of the previous definition
11 | #define rep(i, s, e) for(ll i = s; i < e; i++)
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