Submission #687183

#TimeUTC-0UsernameProblemLanguageResultExecution timeMemory
6871832023-01-26 07:22:02boyliguanhanRegions (IOI09_regions)C++17
90 / 100
8087 ms76236 KiB
#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[41][25001], ans2[25001][41], in[200001], out[200001], li[200001], sz[25001], lg[41];
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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Compilation message (stderr)

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()){
      |                             ~^~~~~~~~~~~~~~~
regions.cpp:44:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |         if(a<arr[r1].size()&&b<arr[r2].size()){
      |            ~^~~~~~~~~~~~~~~
regions.cpp:44:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |         if(a<arr[r1].size()&&b<arr[r2].size()){
      |                              ~^~~~~~~~~~~~~~~
regions.cpp:49:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |         } else if(a<arr[r1].size())
      |                   ~^~~~~~~~~~~~~~~
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