Submission #946322

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
946322	2024-03-14 13:47:38	guagua0407	Harvest (JOI20_harvest)	C++17	100 / 100	410 ms	158188 KiB

harvest

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//#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);
}
struct BIT{
    vector<int> bit;
    int n;
    BIT(int N){
        n=N;
        bit=vector<int>(n,0);
    }
    void update(int pos,int val){
        for(;pos<n;pos+=(pos&-pos)){
            bit[pos]+=val;
        }
 
 
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Compilation message (stderr)

harvest.cpp: In function 'int main()':
harvest.cpp:135:13: warning: unused variable 'cnt' [-Wunused-variable]
  135 |         int cnt=0;
      |             ^~~
harvest.cpp: In function 'void setIO(std::string)':
harvest.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);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
harvest.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: 5 / 5
• Subtask 2: 20 / 20
• Subtask 3: 75 / 75