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"
// @JASPER'S BOILERPLATE
using namespace std;
using ll = long long;
#define fi first
#define se second
#ifdef JASPER
#include "debug.h"
#else
#define debug(...) 166
#endif
using pii = pair < int, int >;
const ll INF = 1e18;
const int MOD = 1e9 + 7;
const int N = 1e5 + 5;
int n, m;
int s[4];
vector <pair <int, int>> adj[N];
ll dis[N][4];
void dijkstra(int x) {
for (int i = 1; i <= n; ++i) dis[i][x] = INF;
using T = pair<ll, int>;
priority_queue <T, vector <T>, greater <T>> q;
dis[s[x]][x] = 0;
q.push({0, s[x]});
// debug(s[x]);
while (!q.empty()) {
auto [du, u] = q.top(); q.pop();
if (du != dis[u][x]) continue;
// debug(du, u);
for (auto [w, v] : adj[u]) {
if (dis[v][x] > dis[u][x] + w) {
dis[v][x] = dis[u][x] + w;
q.push({dis[v][x], v});
}
}
}
}
vector <int> dag[N];
ll dpU[N], dpV[N];
ll ans;
// dpU represents min dis(u, i) on path (s, i)
// dpV represents min dis(v, i) on path (s, i)
// ans = min(dpU() + dis(v, y), dpV() + dis(u, y))
void dfs(int x, int p) {
debug(x);
for (int y : dag[x]) {
if (y != p) {
dfs(y, x);
dpU[x] = min({dpU[x], dpU[y], dis[y][2]});
dpV[x] = min({dpV[x], dpV[y], dis[y][3]});
}
}
ans = min(ans, dpU[x] + dis[x][3]);
ans = min(ans, dpV[x] + dis[x][2]);
}
void run_case() {
cin >> n >> m;
for (int i = 0; i <= 3; ++i) cin >> s[i];
for (int i = 1; i <= m; ++i) {
int u, v, w;
cin >> u >> v >> w;
adj[u].push_back({w, v});
adj[v].push_back({w, u});
}
for (int i = 0; i <= 3; ++i)
dijkstra(i);
for (int x = 1; x <= n; ++x) {
for (auto [w, y] : adj[x]) {
if (dis[x][0] + w + dis[y][1] == dis[s[1]][0]) {
dag[x].push_back(y);
}
}
}
// // taking route directly from u->v
ans = dis[s[2]][3];
debug(ans);
fill(dpU, dpU + n + 5, INF);
fill(dpV, dpV + n + 5, INF);
dfs(s[0], 0);
cout << ans << "\n";
}
signed main() {
cin.tie(0) -> sync_with_stdio(0);
#ifdef JASPER
freopen("in1", "r", stdin);
#endif
int Test = 1;
//cin >> Test;
for (int test = 1; test <= Test; test++){
run_case();
}
}
컴파일 시 표준 에러 (stderr) 메시지
commuter_pass.cpp: In function 'void dfs(int, int)':
commuter_pass.cpp:11:20: warning: statement has no effect [-Wunused-value]
11 | #define debug(...) 166
| ^~~
commuter_pass.cpp:51:5: note: in expansion of macro 'debug'
51 | debug(x);
| ^~~~~
commuter_pass.cpp: In function 'void run_case()':
commuter_pass.cpp:11:20: warning: statement has no effect [-Wunused-value]
11 | #define debug(...) 166
| ^~~
commuter_pass.cpp:85:5: note: in expansion of macro 'debug'
85 | debug(ans);
| ^~~~~
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