Submission #507664

#	Time	Username	Problem	Language	Result	Execution time	Memory
507664		ETK	Travelling Merchant (CCO21_day2problem1)	C++14	25 / 25	1194 ms	32424 KiB

Main

#include <bits/stdc++.h>
#define rep(i,a,b) for(int i=(a);i<=(b);++i)
#define per(i,a,b) for(int i=(a);i>=(b);--i)
#define pii pair<int,int>
#define vi vector<int>
#define fi first
#define se second
#define pb push_back
#define debug(...) fprintf(stderr, __VA_ARGS__)
#define ALL(x) x.begin(),x.end()
#define sz(x) int(x.size())
#define ll long long
using namespace std;
inline ll read(){
    ll x=0,f=1;char ch=getchar();
    while (!isdigit(ch)){if (ch=='-') f=-1;ch=getchar();}
    while (isdigit(ch)){x=x*10+ch-48;ch=getchar();}
    return x*f;
}
const int N=2e5+5,inf = 0x3f3f3f3f;
struct edge{int v,r,p;};
int n,m,l[N],r[N];
vector <edge> G[N];
bool vis[N];
bool dfs(int u,int x){
    if(x <= l[u])return 0;
    if(x >= r[u])return 1;
    vis[u] = 1;
    for(auto &t:G[u]){
        if(x >= t.r){
            if(vis[t.v]){
                vis[u] = 0,r[u] = x;
                return 1;
            }
            if(dfs(t.v,min(inf,x + t.p))){
                vis[u] = 0,r[u] = x;
                return 1;
            }
        }
    }
    vis[u] = 0,l[u] = x;
    return 0;
}
int main(){
    n = read(),m = read();
    rep(i,1,m){
        int a = read(),b = read(),r = read(),p = read();
        G[a].pb((edge){b,r,p});
    }
    rep(i,1,n)l[i] = -1,r[i] = inf + 1;
    rep(i,1,n){
        int L = 0,R = inf;
        while(L < R){
            int mid = (L + R) >> 1;
            if(dfs(i,mid))R = mid;
            else L = mid+1;
        }
        if(L == inf)printf("-1%c"," \n"[i==n]);
        else printf("%d%c",L," \n"[i==n]);
    }
    return 0;
}

• Subtask 1: 4 / 4
• Subtask 2: 5 / 5
• Subtask 3: 16 / 16