Submission #411478

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
411478	2021-05-25 11:41:04	mhy908	Collapse (JOI18_collapse)	C++14	100 / 100	10788 ms	150716 KiB

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#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
#define mp make_pair
#define eb emplace_back
#define F first
#define S second
#define all(x) x.begin(), x.end()
using namespace std;
typedef pair<int, int> pii;
const int BUC=500;
struct UNION_FIND{
    int par[100010], sz[100010], cnt;
    vector<int> vc;
    void init(int num){for(int i=1; i<=num; i++)par[i]=i, sz[i]=1; cnt=0;}
    int findpar(int num){return num==par[num]?num:findpar(par[num]);}
    void mergepar(int a, int b){
        a=findpar(a);
        b=findpar(b);
        if(a==b)return;
        if(sz[a]<sz[b])swap(a, b);
        vc.eb(b);
        par[b]=a;
        sz[a]+=sz[b];
        cnt++;
    }
    void rollback(){
 
 
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Compilation message (stderr)

collapse.cpp: In function 'void solve(int, int)':
collapse.cpp:73:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |         for(; pv<nedge.size(); pv++){
      |               ~~^~~~~~~~~~~~~
collapse.cpp:88:27: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   88 |         while(uf.vc.size()>nsz)uf.rollback();
      |               ~~~~~~~~~~~~^~~~
collapse.cpp:97:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   97 |         for(; pv<nedge.size(); pv++){
      |               ~~^~~~~~~~~~~~~
collapse.cpp:112:27: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  112 |         while(uf.vc.size()>nsz)uf.rollback();
      |               ~~~~~~~~~~~~^~~~

• Subtask 1: 5 / 5
• Subtask 2: 30 / 30
• Subtask 3: 30 / 30
• Subtask 4: 35 / 35