Submission #321088

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
321088	2020-11-10 22:31:16	thatprogrammer	Monkey and Apple-trees (IZhO12_apple)	C++14	100 / 100	555 ms	207844 KiB

apple

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#include <bits/stdc++.h>
using namespace std;
// source: thatprogrammer, modified off normal segtree
// version supports add on range, assign on range
class segtree {
public:
    struct node {
        int val;
        int lazyVal;
        node* c[2];
        bool identity;
        node() {
            val = lazyVal = 0;
            c[0] = c[1] = nullptr;
            identity = false;
        }
        
        void apply(int l, int r, int v) {
            //make sure to update lazyVal here
            val = (r - l + 1) * v;
            lazyVal = v;
        }
    };
    
    node unite(const node &a, const node &b) const {
        // combines two nodes
        if(a.identity) return b;
        if(b.identity) return a;
        node res;
        res.val = a.val + b.val;
 
 
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Compilation message (stderr)

apple.cpp: In function 'int main()':
apple.cpp:120:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  120 |         freopen("input.in", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
apple.cpp:121:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  121 |         freopen("output.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 100 / 100