Submission #262432

#TimeUsernameProblemLanguageResultExecution timeMemory
262432youssefbou62전선 연결 (IOI17_wiring)C++14
0 / 100
205 ms94108 KiB
#include "wiring.h" #include <bits/stdc++.h> #define sz(x) (int)x.size() #define ll long long #define pb push_back #define all(x) x.begin(),x.end() #define fi first #define se second using namespace std; const int MAXN = 2e5+1 ; ll dp[MAXN][20]; int R,B; int Le[MAXN],Ri[MAXN]; int Le1[MAXN],Ri1[MAXN]; void mins(ll& a ,ll b ){ a = min ( a , b ) ; } vector<int> rr , bb ; ll solve (int i ,int u ){ if( i == R && u == B ){ return 0 ; } if( u > Ri[i] ) u = Ri[i] ; if( u < Le[i]) u = Le[i] ; int j = u - Le[i] ; ll& r = dp[i][j]; if( r != -1 ) return r; r = 1e18 ; if( i < R && u < B ){ r = min(r,solve(i+1,u+1)+1LL*abs(rr[i]-bb[u])); // cout << i << " " << u << "* " << abs(rr[i]-bb[u])<<endl; // cout << i + 1 << " i+1 " << u + 1 << " u + 1 "<<solve(i+1,u+1)<<endl; } if( i < R ){ ll s = solve(i+1,u); for(int k = Le[i] ; k <= u ; k++ ){ r=min(r,s+1LL*abs(rr[i]-bb[k])); } } if( u < B ){ ll s = solve(i,u+1); for(int k = Le1[u] ; k <= i && k <= Ri1[u] ; k++ ){ r=min(r,s+1LL*abs(rr[k]-bb[u])); // cout << solve(i,u+1) << " " << abs(rr[k]-bb[u]) <<endl; } } // cout << i << " " << u << " " << r << endl; return r; } long long min_total_length(vector<int> r, vector<int> b) { rr = r ; bb =b ; R = sz(r) , B = sz(b) ; vector<vector<int>> connections; for(int i = 0 ; i < R ; i++ ){ connections.pb({r[i],i,0}); } for(int i = 0 ; i < B ; i++ ){ connections.pb({b[i],i,1}); } sort(all(connections)); for(int i = 0 ; i < sz(connections); i++ ){ for(int j = i - 6 ; j < sz(connections) && j < i + 7 ; j++ ){ if( j < 0 )continue ; int x = connections[i][1] , y =connections[j][1] ; if(connections[i][2]==0&&connections[j][2]){ Ri[x]=max(Ri[x],y); Le[x]=min(Le[x],y); } if(connections[i][2]&&connections[j][2]==0){ Ri1[x]=max(Ri1[x],y); Le1[x]=min(Le1[x],y); } } } memset(dp,-1,sizeof dp); Ri[R]=Ri[R-1]; Le[R]=Le[R-1]; Ri1[B]=Ri1[B-1]; Le1[B]=Le1[B-1]; for(int i =0;i<=R;i++) assert(Ri[i]-Le[i]<=15); for(int i =0;i<=B;i++) assert(Ri1[i]-Le1[i]<=15); return solve(0,Le[0]) ; } // int main() { // int n, m; // assert(2 == scanf("%d %d", &n, &m)); // vector<int> r(n), b(m); // for(int i = 0; i < n; i++) // assert(1 == scanf("%d", &r[i])); // for(int i = 0; i < m; i++) // assert(1 == scanf("%d", &b[i])); // long long res = min_total_length(r, b); // printf("%lld\n", res); // return 0; // } //
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