제출 #687193

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
687193	2023-01-26 07:31:50	boyliguanhan	Regions (IOI09_regions)	C++17	90 / 100	8090 ms	74304 KiB

regions

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#include<bits/stdc++.h>
#pragma GCC optimize(3)
#define l int
int read(){
    char x = getchar();
    int val = 0;
    while(x<'0'||x>'9')x=getchar();
    while('0'<=x&&x<='9')
        val = val*10+x-'0', x=getchar();
    return val;
}
using namespace std;
vector<l> adj[200001];
vector<pair<l,l>> arr[25001];
l region[200001], t, ans1[21][25001], ans2[25001][21], in[200001], out[200001], li[200001], sz[25001], lg[21];
void merge(unordered_map<l, l> &a, unordered_map<l, l> b){
    if(a.size()<b.size())
        swap(a, b);
    for(auto i: b)
        a[i.first]+=i.second;
}
unordered_map<l,l> dfs(l n){
    unordered_map<l,l> cur;
    cur[region[n]]=1;
    in[n]=t++;
    arr[region[n]].push_back({in[n],1});
    for(auto i: adj[n]){
        merge(cur, dfs(i));
    }
    out[n]=t++;
 
 
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컴파일 시 표준 에러 (stderr) 메시지

regions.cpp: In function 'int query_s(int, int)':
regions.cpp:43:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |     while(a<arr[r1].size()&&b<arr[r2].size()){
      |           ~^~~~~~~~~~~~~~~
regions.cpp:43:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |     while(a<arr[r1].size()&&b<arr[r2].size()){
      |                             ~^~~~~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 75 / 85