제출 #72950

#제출 시각아이디문제언어결과실행 시간메모리
72950SmsS전선 연결 (IOI17_wiring)C++17
20 / 100
1089 ms10756 KiB
#include<bits/stdc++.h> using namespace std; #define for2(a,b,c) for(int a=b;a<c;a++) #define ll long long #include "wiring.h" ll sub2(vector<int> r,vector<int> b){ ll res = 0; int L = 0; int R = b.size()-1; while(L != r.size() && R != -1){ res += b[R]-r[L]; L++; R--; } while(R != -1){ res += b[R]-r[L-1]; R--; } while(L != r.size()){ res += b[R+1]-r[L]; L++; } return res; } #define PII pair<int,int> #define F first #define S second #define pb push_back #define all(x) (x).begin(),(x).end() const int maxn = 200100; ll dp[maxn]; ll sub3(vector<int> v1,vector<int> v2){ vector<int> v[2]; vector<PII> V; vector<int> par[2]; vector<int> jam[2]; for(auto x : v1) { v[0].pb(x); V.pb({x,0}); } for(auto x : v2){ v[1].pb(x); V.pb({x,1}); } sort(all(V)); int n = V.size(); par[0].resize(n+1); par[1].resize(n+1); jam[0].resize(n+1); jam[1].resize(n+1); for2(i,0,n){ par[0][i+1] = par[0][i] + (V[i].S==0); par[1][i+1] = par[1][i] + (V[i].S==1); jam[0][i+1] = jam[0][i] + V[i].F; } for2(i,0,n){ int x = V[i].F; bool t = V[i].S; dp[i] = 1e18; ll tmp = 1e18; int ind = lower_bound(all(v[!t]),x)-v[!t].begin(); if(ind != v[!t].size()) tmp = min(tmp,(ll)v[!t][ind]-x); ind --; if(ind >= 0) tmp = min(tmp,(ll)x-v[!t][ind]); if(i) tmp += dp[i-1]; dp[i] = tmp; int st = -1; int en = i; while(st != en-1){ int mid = (st+en)/2; if(par[!t][i+1]-par[!t][mid] == 0) en = mid; else st = mid; } int cnt = i-en+1; if(en-cnt < 0 || par[t][en]-par[t][en-cnt]) continue; tmp = 0; ll k = 0; /* for(int j = i; j >= i-cnt; j--){ if(j != i) tmp += k*(V[j+1].F-V[j].F); k++; }*/ tmp = jam[0][i+1]-jam[0][i+1-cnt]; tmp -= V[i-cnt].F*cnt; k = 0; for(int j = i-cnt*2+1; j <= i-cnt; j++){ if(j != i-2*cnt+1) tmp += k*(V[j].F-V[j-1].F); k++; } dp[i] = min(dp[i],dp[i-2*cnt]+tmp); } return dp[V.size()-1]; } long long min_total_length(std::vector<int> r, std::vector<int> b) { if(r.back() < b[0]) return sub2(r,b); return sub3(r,b); }

컴파일 시 표준 에러 (stderr) 메시지

wiring.cpp: In function 'long long int sub2(std::vector<int>, std::vector<int>)':
wiring.cpp:11:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  while(L != r.size() && R != -1){
        ~~^~~~~~~~~~~
wiring.cpp:20:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  while(L != r.size()){
        ~~^~~~~~~~~~~
wiring.cpp: In function 'long long int sub3(std::vector<int>, std::vector<int>)':
wiring.cpp:67:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(ind != v[!t].size()) tmp = min(tmp,(ll)v[!t][ind]-x);
      ~~~~^~~~~~~~~~~~~~~
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