Submission #944813

#	Time	Username	Problem	Language	Result	Execution time	Memory
944813		guagua0407	Treatment Project (JOI20_treatment)	C++17	0 / 100	883 ms	524288 KiB

treatment

//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

int dx[4]={0,0,1,-1};
int dy[4]={1,-1,0,0};

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

const int mxn=1e5+5;
const ll inf=1e18;
int t[mxn],l[mxn],r[mxn],c[mxn];
vector<pair<int,int>> adj[mxn];

vector<ll> dij(int n){
    vector<ll> d(n,inf);
    d[0]=0;
    priority_queue<pair<ll,int>,vector<pair<ll,int>>,greater<pair<ll,int>>> pq;
    pq.push({0,0});
    while(!pq.empty()){
        auto tmp=pq.top();
        pq.pop();
        int v=tmp.s;
        if(tmp.f!=d[v]) continue;
        for(auto u:adj[v]){
            if(d[v]+u.s<d[u.f]){
                d[u.f]=d[v]+u.s;
                pq.push({d[u.f],u.f});
            }
        }
    }
    return d;
}

int main() {_
    int n,m;
    cin>>n>>m;
    for(int i=1;i<=m;i++){
        cin>>t[i]>>l[i]>>r[i]>>c[i];
    }
    for(int i=1;i<=m;i++){
        for(int j=1;j<=m;j++){
            if(i==j) continue;
            int x=i,y=j;
            if(t[x]<=t[y]){
                if(r[x]+t[x]>=l[y]+t[y]) adj[x].push_back({y,c[y]});
            }
            else{
                if(r[x]-t[x]>=l[y]-t[y]) adj[x].push_back({y,c[y]});
            }
        }
    }
    for(int i=1;i<=m;i++){
        if(l[i]==1) adj[0].push_back({i,c[i]});
        if(r[i]==n) adj[i].push_back({m+1,0});
    }
    vector<ll> d=dij(m+2);
    cout<<(d[m+1]==inf?-1:d[m+1])<<'\n';
    return 0;
}
//maybe its multiset not set
//yeeorz
//laborz

Compilation message (stderr)

treatment.cpp: In function 'void setIO(std::string)':
treatment.cpp:15:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
treatment.cpp:16:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 4
• Subtask 2: 0 / 5
• Subtask 3: 0 / 30
• Subtask 4: 0 / 61