제출 #838040

#제출 시각아이디문제언어결과실행 시간메모리
838040Kerim전선 연결 (IOI17_wiring)C++17
17 / 100
1092 ms6892 KiB
#include "wiring.h" #include "bits/stdc++.h" #define ff first #define ss second #define ll long long using namespace std; const ll B = 1e16; void make(vector<ll>&v, int sz){ v.resize(sz); for (int i = 0; i < sz; i++) v[i] = B; } ll min_total_length(vector<int> r, vector<int> b) { vector<pair<int,int> > v; vector<vector<int> > d; vector<int> sz; for (auto x: r) v.push_back({x, 0}); for (auto x: b) v.push_back({x, 1}); sort(v.begin(), v.end()); for (int i = 0; i < v.size(); i++){ int j = i; vector<int> g{-1}; while (j < v.size() and v[i].ss == v[j].ss) g.push_back(v[j++].ff); d.push_back(g); sz.push_back(j - i); i = j - 1; } int n = d.size(); vector<ll> dp, odp; vector<ll> pre, suf; make(dp, sz[0]+1); dp[0] = 0; for (int i = 1; i < n; i++){ swap(odp, dp); make(dp, sz[i]+1); dp[0] = odp[sz[i-1]]; pre.resize(sz[i]+1); suf.resize(sz[i-1]+2); for (int j = 1; j <= sz[i]; j++) pre[j] = pre[j-1] + d[i][j]; suf[sz[i-1]+1] = 0; for (int j = sz[i-1]; j >= 1; j--) suf[j] = suf[j+1] + d[i-1][j]; for (int j = 1; j <= sz[i]; j++){ int p = sz[i-1]+1-j; if (p >= 1){ for (int k = 1; k < p; k++) dp[j] = min(dp[j], pre[j]-j*1LL*d[i][1] + min(odp[k-1], odp[k])+(d[i][1]-d[i-1][sz[i-1]])*1LL*(sz[i-1]-k+1)+d[i-1][sz[i-1]]*1LL*(sz[i-1]-k+1)-suf[k]); for (int k = p; k <= sz[i-1]; k++) dp[j] = min(dp[j], (d[i][1]-d[i-1][sz[i-1]])*1LL*j+pre[j]-j*1LL*d[i][1] + min(odp[k-1], odp[k])+d[i-1][sz[i-1]]*1LL*(sz[i-1]-k+1) - suf[k]); } else{ for (int k = 1; k <= sz[i-1]; k++) dp[j] = min(dp[j], (d[i][1]-d[i-1][sz[i-1]])*1LL*j+pre[j]-j*1LL*d[i][1] + min(odp[k-1], odp[k])+d[i-1][sz[i-1]]*1LL*(sz[i-1]-k+1) - suf[k]); } } } return dp[sz[n-1]]; }

컴파일 시 표준 에러 (stderr) 메시지

wiring.cpp: In function 'long long int min_total_length(std::vector<int>, std::vector<int>)':
wiring.cpp:20:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |  for (int i = 0; i < v.size(); i++){
      |                  ~~^~~~~~~~~~
wiring.cpp:23:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |   while (j < v.size() and v[i].ss == v[j].ss)
      |          ~~^~~~~~~~~~
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