이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
/*
`-:://:::-
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.o:--...```..---+/`
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``````
*/
#ifdef aimbot
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("unroll-loops")
#endif
#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <map>
#include <set>
#include <queue>
#include <ostream>
#include <istream>
#include <typeinfo>
#include <iomanip>
#include <cstdio>
#include <cstdlib>
#include <cassert>
#include <limits>
#include <fstream>
#include <array>
#include <list>
#include <bitset>
#include <functional>
#include <random>
#include <cstring>
#include <chrono>
#define random escape__from__random__aetuhoetnuhshe
#define mt make_tuple
#define x first
#define y second
#define pb push_back
#define ppb pop_back
#define mp make_pair
#define umap unordered_map
#define uset unordered_set
#define elif else if
#define len(v) ((int)v.size())
#define f(i, n) for (int i = 0; i < (n); i++)
#define rof(i, n) for (int i = ((n) - 1); i >= 0; i--)
#define apply(v, act) for (auto &x : v) { act; }
#define log(args...) {string s = #args;deque<string> deq;\
string buf = "";int bal = 0;for (char c : s) {\
if (c == '(' || c == '[' || c == '{') {bal++;\
} else if (c == ')' || c == ']' || c == '}') {\
bal--;} else {if (bal == 0) {if (c == ',') {\
deq.pb(buf);buf = "";} else {if (c != ' ') {\
buf += c;}}}}}if (!buf.empty()) {deq.pb(buf);}\
smart_io::precall_print();smart_io::_print(deq, args);}
#define print \
smart_io::precall_print(); \
cout,
#define scan cin,
#ifdef fast_allocator
const int MAXMEM = 200 * 1000 * 1024;
char _memory[MAXMEM];
size_t _ptr = 0;
void* operator new(size_t _x) { _ptr += _x; assert(_ptr < MAXMEM); return _memory + _ptr - _x; }
void operator delete (void*) noexcept {}
#endif
using namespace std;
char string_in_buffer[(int)260];
void fast_scan(int &x) { scanf("%d", &x); }
void fast_scan(long long &x) { scanf("%lld", &x); }
void fast_scan(unsigned long long &x) { scanf("%llu", &x); }
void fast_scan(double &x) { scanf("%lf", &x); }
void fast_scan(long double &x) { scanf("%Lf", &x); }
void fast_scan(char &x) {
scanf("%c", &x);
if (x == '\n') {
fast_scan(x);
}
}
void fast_scan(string &x) {
scanf("%s", string_in_buffer);
x = string(string_in_buffer);
}
template<class TFirst, class TSecond>
void fast_scan(pair<TFirst, TSecond> &p) {
fast_scan(p.first);
fast_scan(p.second);
}
template <class T>
void fast_scan(vector<T> &v) {
for (auto &x : v) fast_scan(x);
}
void fast_print(const int &x) { printf("%d", x); }
void fast_print(const unsigned int &x) { printf("%u", x); }
void fast_print(const long long &x) { printf("%lld", x); }
void fast_print(const unsigned long long &x) { printf("%llu", x); }
void fast_print(const double &x) { printf("%.15lf", x); }
void fast_print(const long double &x) { printf("%.15Lf", x); }
void fast_print(const char &x) { printf("%c", x); };
void fast_print(const string &x) { printf("%s", x.c_str());}
void fast_print(const char v[]) { fast_print((string)v); }
template<class TFirst, class TSecond>
void fast_print(const pair<TFirst, TSecond> &p) {
fast_print(p.first);
fast_print(' ');
fast_print(p.second);
}
template <class T>
void fast_print(const vector<T> &v) {
if (v.empty()) return;
fast_print(v[0]);
for (int i = 1; i < v.size(); i++) {
fast_print(' ');
fast_print(v[i]);
}
}
template <class T>
void fast_print(const vector<vector<T>> &v) {
if (v.empty()) return;
fast_print(v[0]);
for (int i = 1; i < v.size(); i++) {
fast_print('\n');
fast_print(v[i]);
}
}
template <class T>
void fast_print(const T &v) {
for (const auto &x : v) {
fast_print(x);
fast_print(' ');
}
}
using namespace std;
namespace smart_io {
string print_start = "";
string sep = " ";
bool first_print = false;
void precall_print() {
fast_print(print_start);
print_start = "\n";
first_print = true;
}
void _print(deque<string>) {}
template<class T, class... Args>
void _print(deque<string> names, T elem, Args... args) {
if (!first_print) {
fast_print("\n");
} else {
first_print = false;
}
fast_print(names.front());
fast_print(" = ");
fast_print(elem);
names.pop_front();
_print(names, args...);
}
} //namespace smart_io
template <class T>
ostream &operator,(ostream &os, const T &object) {
if (!smart_io::first_print) {
fast_print(smart_io::sep);
} else {
smart_io::first_print = false;
}
fast_print(object);
return os;
}
template <class T>
istream &operator,(istream &is, T &object) {
fast_scan(object);
return is;
}
namespace random {
using namespace std::chrono;
mt19937 rng(duration_cast< milliseconds >(
system_clock::now().time_since_epoch()
).count());
};
#define int long long
namespace typedefs {
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> pii;
typedef long double ld;
}
namespace numbers_operation {
template<class T>
T floor_mod(T a, T b) {
if (a >= 0 && b >= 0) return a % b;
if (a <= 0 && b <= 0) return a % b;
return abs(b) - (abs(a) % abs(b));
}
}
using namespace numbers_operation;
using namespace typedefs;
using namespace random;
int n, m;
int S, T, U, V;
vector<vector<pii>> g;
vector<int> sdist;
vector<int> udist;
vector<int> vdist;
vector<int> tdist;
vector<int> dijkstra(int v) {
vector<int> dist(n, 1e18);
dist[v] = 0;
auto cmp = [&dist](int a, int b) {
return dist[a] > dist[b];
};
priority_queue<int, vector<int>, decltype(cmp)> deq(cmp);
deq.push(v);
while (!deq.empty()) {
int v = deq.top();
deq.pop();
for (pii sub : g[v]) {
if (dist[sub.x] > dist[v] + sub.y) {
dist[sub.x] = dist[v] + sub.y;
deq.push(sub.x);
}
}
}
return dist;
}
signed main(signed argc, char *argv[]) {
scan n, m;
scan S, T, U, V;
S--, T--, U--, V--;
g.resize(n);
f(i, m) {
int a, b, w;
scan a, b, w;
a--;b--;
g[a].emplace_back(b, w);
g[b].emplace_back(a, w);
}
sdist = dijkstra(S);
tdist = dijkstra(T);
udist = dijkstra(U);
vdist = dijkstra(V);
vector<int> p(n);
f(i, n) p[i] = i;
sort(p.begin(), p.end(), [](int a, int b) {
return tdist[a] < tdist[b];
});
vector<int> dp(n, 1e18);
int rez = udist[V];
for (int x : p) {
if (tdist[x] + sdist[x] != sdist[T]) continue;
dp[x] = udist[x];
for (pii sub : g[x]) {
dp[x] = min(dp[x], dp[sub.x]);
}
rez = min(rez, dp[x] + vdist[x]);
}
dp = vector<int>(n, 1e18);
for (int x : p) {
if (tdist[x] + sdist[x] != sdist[T]) continue;
dp[x] = vdist[x];
for (pii sub : g[x]) {
dp[x] = min(dp[x], dp[sub.x]);
}
rez = min(rez, dp[x] + udist[x]);
}
print rez;
}
컴파일 시 표준 에러 (stderr) 메시지
commuter_pass.cpp: In function 'void fast_scan(int&)':
commuter_pass.cpp:133:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
void fast_scan(int &x) { scanf("%d", &x); }
~~~~~^~~~~~~~~~
commuter_pass.cpp: In function 'void fast_scan(long long int&)':
commuter_pass.cpp:134:37: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
void fast_scan(long long &x) { scanf("%lld", &x); }
~~~~~^~~~~~~~~~~~
commuter_pass.cpp: In function 'void fast_scan(long long unsigned int&)':
commuter_pass.cpp:135:46: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
void fast_scan(unsigned long long &x) { scanf("%llu", &x); }
~~~~~^~~~~~~~~~~~
commuter_pass.cpp: In function 'void fast_scan(double&)':
commuter_pass.cpp:136:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
void fast_scan(double &x) { scanf("%lf", &x); }
~~~~~^~~~~~~~~~~
commuter_pass.cpp: In function 'void fast_scan(long double&)':
commuter_pass.cpp:137:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
void fast_scan(long double &x) { scanf("%Lf", &x); }
~~~~~^~~~~~~~~~~
commuter_pass.cpp: In function 'void fast_scan(char&)':
commuter_pass.cpp:139:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%c", &x);
~~~~~^~~~~~~~~~
commuter_pass.cpp: In function 'void fast_scan(std::__cxx11::string&)':
commuter_pass.cpp:145:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%s", string_in_buffer);
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