Submission #941143

#	Time	Username	Problem	Language	Result	Execution time	Memory
941143		guagua0407	Treatment Project (JOI20_treatment)	C++17	0 / 100	173 ms	524288 KiB

treatment

//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define int ll
#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;
vector<ll> segtree(mxn*4,inf);

void update(int pos,int val,int l=0,int r=mxn-1,int v=1){
    if(l==r){
        segtree[v]=min(segtree[v],val);
        return;
    }
    int mid=(l+r)/2;
    if(pos<=mid) update(pos,val,l,mid,v*2);
    else update(pos,val,mid+1,r,v*2+1);
    segtree[v]=min(segtree[v*2],segtree[v*2+1]);
}

int query(int tl,int tr,int l=0,int r=mxn-1,int v=1){
    if(r<tl or tr<l){
        return inf;
    }
    if(tl<=l and r<=tr){
        return segtree[v];
    }
    int mid=(l+r)/2;
    return min(query(tl,min(mid,tr),l,mid,v*2),query(max(mid+1,tl),tr,mid+1,r,v*2+1));
}

signed main() {_
    int n,m;
    cin>>n>>m;
    vector<int> q[mxn];
    vector<int> t(m),l(m),r(n),c(m);
    vector<int> xs;
    xs.push_back(0);
    for(int i=0;i<m;i++){
        cin>>t[i]>>l[i]>>r[i]>>c[i];
        xs.push_back(r[i]);
    }
    sort(all(xs));
    xs.resize(unique(all(xs))-xs.begin());
    if(xs.back()!=n){
        cout<<-1<<'\n';
        return 0;
    }
    for(int i=0;i<m;i++){
        r[i]=lower_bound(all(xs),r[i])-xs.begin();
        q[r[i]].push_back(i);
    }
    vector<ll> dp(xs.size(),inf);
    update(0,0);
    for(int i=1;i<xs.size();i++){
        for(auto v:q[i]){
            l[v]=lower_bound(all(xs),l[v]-1)-xs.begin();
            dp[i]=min(dp[i],query(l[v],i)+c[v]);
        }
        update(i,dp[i]);
    }
    ll ans=dp[xs.size()-1];
    cout<<(ans==inf?-1:ans)<<'\n';
    return 0;
}
//maybe its multiset not set
//yeeorz
//laborz

// dp[i]=

Compilation message (stderr)

treatment.cpp: In function 'int main()':
treatment.cpp:69:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |     for(int i=1;i<xs.size();i++){
      |                 ~^~~~~~~~~~
treatment.cpp: In function 'void setIO(std::string)':
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 + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
treatment.cpp:17:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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