Submission #1172444

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1172444	2025-03-23 14:16:55	DanielPr8	Railway (BOI17_railway)	C++20	0 / 100	192 ms	31004 KiB

railway

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#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vll = vector<ll>;
using vvl = vector<vll>;
using pll = pair<ll,ll>;
using vpl = vector<pll>;
using vvp = vector<vpl>;
#define f first
#define s second
#define pb push_back
#define all(v) v.begin(),v.end()
vector<map<ll,ll>> wh;
vll am, col;
void uni(ll a, ll b){
    if(wh[a].size()<wh[b].size()){
        uni(b,a);
        swap(wh[a],wh[b]);
        swap(am[a],am[b]);
        return;
    }
    for(auto [c,d]:wh[b]){
        if(d==0)continue;
        if(!wh[a].count(c)){am[a]++;wh[a][c]=0;}
        wh[a][c]+=d;
        if(wh[a][c]==col[c])am[a]--;
    }
}
 
 
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