Submission #987106

#	Time	Username	Problem	Language	Result	Execution time	Memory
987106		cpdreamer	Sjeckanje (COCI21_sjeckanje)	C++14	0 / 110	2 ms	348 KiB

Main

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using namespace std;

typedef tree<int,null_type,less<int>,rb_tree_tag,
        tree_order_statistics_node_update> indexed_set;
const int max_n=INT_MAX;
typedef long long  ll;
#define pb push_back
#define F first
#define S second
#define all(v) v.begin(),v.end()
#define  P pair
#define V vector
const long long MOD = 1000000007; // 1e9 + 7


void file(){
    freopen("input.txt.txt","r",stdin);
    freopen("output.txt.txt","w",stdout);
}
void setio(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}
struct station{
    int p;
    int c;
    int l;
    int r;
};
bool custom(station a,station b) {
    return a.p < b.p;
}
struct segtree{
private:
    struct node{
        int maximum_value;
        int last_min;
        int last_max;
        int first_min;
        int first_max;
        bool divided;
    };
    node neutral{-1,0,0,0,0,false};
    static node single( int a) {
        return {0,a,a,a,a,false};
    }
    static node merge(node a,node b){
          if(b.maximum_value==-1)
              return a;
          if(a.maximum_value==-1)
              return b;
          node c{};
          c.divided=false;
          c.maximum_value=a.maximum_value+b.maximum_value-(a.last_max-a.last_min)-(b.first_max-b.first_min);
          if(((a.last_max-a.last_min)+(b.first_max-b.first_min))>=(max(a.last_max,b.first_max)-min(a.last_min,b.first_min))){
              c.maximum_value+=(a.last_max-a.last_min)+(b.first_max-b.first_min);
              c.divided=true;
          }
          else{
              c.maximum_value=(max(a.last_max,b.first_max)-min(a.last_min,b.first_min));
          }
          if(c.divided){
              c.first_max=a.first_max;
              c.first_min=a.first_min;
              c.last_min=b.last_min;
              c.last_max=b.last_max;
          }
          else{
              if(a.divided){
                  c.first_max=a.first_max;
                  c.first_min=a.first_min;
              }
              else{
                  c.first_max=max(a.first_max,b.first_max);
                  c.first_min=min(a.first_min,b.first_min);
              }
              if(b.divided) {
                  c.last_min = b.last_min;
                  c.last_max = b.last_max;
              }
              else{
                  c.last_min=min(b.last_min,a.last_min);
                  c.last_max=max(b.last_max,a.last_max);
              }
          }
        c.divided=a.divided||b.divided;
          return c;
    }
public:
    int size;
    V<node>query;
    void init(int n){
        size=1;
        while(size<n)size*=2;
        query.assign(2*size,{0});
    }
    void build(V<int>&a,int x,int lx,int rx){
        if(rx-lx==1){
            if(lx<a.size())
                query[x]=single(a[lx]);
            return;
        }
        int m=(lx+rx)/2;
        build(a,2*x+1,lx,m);
        build(a,2*x+2,m,rx);
        query[x]=merge(query[2*x+1],query[2*x+2]);
    }
    void build(V<int>&a){
        build(a,0,0,size);
    }
    void set(int i,int v,int x,int lx,int rx){
        if(rx-lx==1){
            query[x]=single(v);
            return;
        }
        int m=(lx+rx)/2;
        if(i<m)
            set(i,v,2*x+1,lx,m);
        else
            set(i,v,2*x+2,m,rx);
        query[x]=merge(query[2*x+1],query[2*x+2]);
    }
    void set(int i,int v){
        set(i,v,0,0,size);
    }
    int calc(){
        return query[0].maximum_value;
    }
};

void solve(){
      int n;
      cin>>n;
      int q;
      cin>>q;
      V<int>a(n);
      for(int i=0;i<n;i++)
        cin>>a[i];
      segtree tree;
      tree.init(n);
      tree.build(a);
      while(q--){
          int l,r,v;
          cin>>l>>r>>v;
          for(int i=l-1;i<r;i++){
              a[i]+=v;
              tree.set(i,a[i]);
          }
          cout<<tree.calc()<<endl;

      }

}


int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
   // file();
    solve();

    return 0;
}

Compilation message (stderr)

Main.cpp: In member function 'void segtree::build(std::vector<int>&, int, int, int)':
Main.cpp:102:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  102 |             if(lx<a.size())
      |                ~~^~~~~~~~~
Main.cpp: In function 'void file()':
Main.cpp:20:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |     freopen("input.txt.txt","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:21:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |     freopen("output.txt.txt","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp: In function 'void setio(std::string)':
Main.cpp:24:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:25:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 40
• Subtask 3: 0 / 55