제출 #849130

#제출 시각아이디문제언어결과실행 시간메모리
849130HyojinCrocodile's Underground City (IOI11_crocodile)C++17
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h> using namespace std; #define bit(n,i) ((n>>i)&1) #define all(a) (a).begin(),(a).end() #define pb push_back #define ep emplace_back #define pii pair<int,int> #define piii pair<int,pii> #define fi first #define se second #define ll long long #define debug(x) cerr << #x << ' ' << x << '\n' #define dbg(x) cerr<<#x<<' '<<x<<' ' const int base=31; const int MOD=1e9+7; const int N=1e5+5; void setIO(const string &NAME) { if (NAME.size()) { freopen((NAME+".inp").c_str(),"r",stdin); freopen((NAME+".out").c_str(),"w",stdout); } } pair<ll,ll>d[N]; bool vis[N]; vector<pii>adj[N]; ll travel_plan(int n,int m,int r[][2],int l[],int k,int p[]) { for (int i=0;i<m;i++) { int u=r[i][0],v=r[i][1]; adj[u].pb({v,l[i]}); adj[v].pb({u,l[i]}); } for (int i=0;i<n;i++) d[i]={1e18,1e18}; priority_queue<pair<ll,int>>pq; for (int i=0;i<k;i++) { pq.push({0,p[i]}); d[p[i]]={0,0}; } while (pq.size()) { auto [cost,u]=pq.top(); cost=-cost; pq.pop(); if (vis[u]) continue; vis[u]=1; for (auto [v,w]:adj[u]) { if (cost+w<d[v].se) { d[v].se=cost+w; if (d[v].se<d[v].fi) swap(d[v].fi,d[v].se); if (d[v].se!=1e18) pq.push({-d[v].se,v}); } } } return d[0].se; } int main() { ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0); #ifdef Amon setIO("Amon"); #endif return 0; }

컴파일 시 표준 에러 (stderr) 메시지

crocodile.cpp: In function 'void setIO(const string&)':
crocodile.cpp:21:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |   freopen((NAME+".inp").c_str(),"r",stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
crocodile.cpp:22:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |   freopen((NAME+".out").c_str(),"w",stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccZtLQE6.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccQfnbw8.o:crocodile.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status