Submission #127109

#	Time	Username	Problem	Language	Result	Execution time	Memory
127109		liwi	Ceste (COCI17_ceste)	C++11	0 / 160	5 ms	508 KiB

ceste

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;
typedef tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_set;

#define scan(x) do{while((x=getchar())<'0'); for(x-='0'; '0'<=(_=getchar()); x=(x<<3)+(x<<1)+_-'0');}while(0)
char _;
#define complete_unique(a) a.erase(unique(a.begin(),a.end()),a.end())
#define all(a) a.begin(),a.end()
#define println printf("\n");
#define readln(x) getline(cin,x);
#define pb push_back
#define endl "\n"
#define INT_INF 0x3f3f3f3f
#define LL_INF 0x3f3f3f3f3f3f3f3f
#define MOD 1000000007
#define mp make_pair
#define fastio cin.tie(0); cin.sync_with_stdio(0);

#define MAXN 2005

typedef unsigned long long ull;
typedef long long ll;
typedef long double ld;
typedef unordered_map<int,int> umii;
typedef pair<int,int> pii;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef pair<int,pii> triple;
typedef int8_t byte;

mt19937 g1(time(0));

int randint(int a, int b){return uniform_int_distribution<int>(a, b)(g1);}
ll randlong(ll a,ll b){return uniform_int_distribution<long long>(a, b)(g1);}

ll gcd(ll a, ll b){return b == 0 ? a : gcd(b, a % b);}
ll lcm(ll a, ll b){return a*b/gcd(a,b);}
ll fpow(ll  b, ll exp, ll mod){if(exp == 0) return 1;ll t = fpow(b,exp/2,mod);if(exp&1) return t*t%mod*b%mod;return t*t%mod;}
ll divmod(ll i, ll j, ll mod){i%=mod,j%=mod;return i*fpow(j,mod-2,mod)%mod;}

int num_nodes,num_edges;
pii dis[MAXN][2]; //first is minimize time, second is cost
vector<pair<int,pii>> connections[MAXN];

int main(){
	scanf("%d %d",&num_nodes,&num_edges);
	for(int i=1; i<=num_edges; i++){
		int a,b,t,c; scanf(" %d %d %d %d",&a,&b,&t,&c);
		connections[a].pb(mp(b,mp(t,c)));
		connections[b].pb(mp(a,mp(t,c)));
	}
	memset(dis,0x3f,sizeof dis);
	dis[1][0] = dis[1][1] = mp(0,0);
	queue<pair<int,pii>> q;
	q.push(mp(1,dis[1][0]));
	while(q.size()){
		int node = q.front().first, tt = q.front().second.first, tc = q.front().second.second; q.pop();
		if(tt > dis[node][0].first && tc > dis[node][1].second) continue;
		for(pair<int,pii> check:connections[node]){
			int nt = tt+check.second.first, nc = tc+check.second.second;
			if(nt < dis[check.first][0].first || (nt == dis[check.first][0].first && nc < dis[check.first][0].second)){
				dis[check.first][0] = mp(nt,nc);
				q.push(mp(check.first,dis[check.first][0]));
			}
			if(nc < dis[check.first][1].second || (nc == dis[check.first][1].second && nt < dis[check.first][1].first)){
				dis[check.first][1] = mp(nt,nc);
				q.push(mp(check.first,dis[check.first][1]));
			}
		}
	}
	for(int i=2; i<=num_nodes; i++){
		if(dis[i][0].first == 0x3f3f3f3f) printf("-1\n");
		else printf("%lld\n",min(1LL*dis[i][0].first*dis[i][0].second,1LL*dis[i][1].first*dis[i][1].second));
	}
}

Compilation message (stderr)

ceste.cpp: In function 'int main()':
ceste.cpp:50:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&num_nodes,&num_edges);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ceste.cpp:52:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int a,b,t,c; scanf(" %d %d %d %d",&a,&b,&t,&c);
                ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 16
• Subtask 2: 0 / 16
• Subtask 3: 0 / 16
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