제출 #1034474

#제출 시각아이디문제언어결과실행 시간메모리
1034474WansurAliens (IOI16_aliens)C++14
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h> #define ent '\n' #define f first #define s second typedef long long ll; using namespace std; const int maxn = 1e6+12; pair<ll, int> dp[maxn]; vector<int> g[maxn]; bool was[maxn]; vector<int> t; int L[maxn]; int R[maxn]; int n, m; struct line{ ll k, b; int c; }; bool check(line nw, line last, line prl){ if((nw.b - prl.b) * (prl.k - last.k) <= (last.b - prl.b) * (prl.k - nw.k))return 1; return 0; } int ptr = 0; vector<line> l; void add(line x){ while(l.size() && l.back().k == x.k && l.back().b > x.b){ l.pop_back(); } if(l.size() && l.back().k == x.k && l.back().b <= x.b){ return; } while(l.size()>1 && check(x, l.back(), l[l.size()-2])){ l.pop_back(); } l.push_back(x); } pair<ll, int> get(ll x){ if(!l.size()){ return {1e18, 1e9}; } if(ptr >= l.size()){ ptr = l.size()-1; } while(ptr + 1 < l.size() && l[ptr].k * x + l[ptr].b > l[ptr+1].k * x + l[ptr+1].b){ ptr++; } while(ptr - 1 >= 0 && l[ptr].k * x + l[ptr].b > l[ptr-1].k * x + l[ptr-1].b){ ptr--; } return {l[ptr].k * x + l[ptr].b, l[ptr].c + 1}; } int check(ll k){ add({0, 0, 0}); for(int &i:t){ dp[i] = get(i); dp[i].f += i * 1ll * i + k; for(int &j:g[i]){ ll b = j * 1ll * j + dp[R[j]].f, c = dp[R[j]].s; if(R[j] > j) b -= (R[j] - j) * 1ll * (R[j] - j); add(line(-2 * j, b, c)); } } l.clear(); ptr = 0; return dp[m].s; } long long take_photos(int N, int M, int k, vector<int> r, vector<int> c){ n = N, m = M; for(int i=1;i<=m;i++){ L[i] = 1e9; } m = 0; for(int i=0;i<n;i++){ if(r[i] < c[i]){ swap(r[i], c[i]); } r[i]++, c[i]++; L[r[i]] = min(L[r[i]], c[i]); R[c[i]] = max(R[c[i]], r[i]); for(int x=-1;x<=0;x++){ was[r[i]+x] = was[c[i]+x] = 1; } m = max(m, r[i]); } was[1] = 1; for(int i=1;i<=m;i++){ R[i] = max(R[i], R[i-1]); if(!was[i]) continue; t.push_back(i); g[max(R[i], i)].push_back(i); } ll val = 1e13; for(ll l = 0, r = 1e13; l <= r;){ ll mid = l + r >> 1; if(check(mid) <= k){ val = mid; r = mid - 1; } else l = mid + 1; } check(val); return dp[m].f - k * val; }

컴파일 시 표준 에러 (stderr) 메시지

aliens.cpp: In function 'std::pair<long long int, int> get(ll)':
aliens.cpp:48:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<line>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |     if(ptr >= l.size()){
      |        ~~~~^~~~~~~~~~~
aliens.cpp:51:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<line>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |     while(ptr + 1 < l.size() && l[ptr].k * x + l[ptr].b > l[ptr+1].k * x + l[ptr+1].b){
      |           ~~~~~~~~^~~~~~~~~~
aliens.cpp: In function 'int check(ll)':
aliens.cpp:68:34: error: no matching function for call to 'line::line(int, ll&, ll&)'
   68 |             add(line(-2 * j, b, c));
      |                                  ^
aliens.cpp:18:8: note: candidate: 'line::line()'
   18 | struct line{
      |        ^~~~
aliens.cpp:18:8: note:   candidate expects 0 arguments, 3 provided
aliens.cpp:18:8: note: candidate: 'constexpr line::line(const line&)'
aliens.cpp:18:8: note:   candidate expects 1 argument, 3 provided
aliens.cpp:18:8: note: candidate: 'constexpr line::line(line&&)'
aliens.cpp:18:8: note:   candidate expects 1 argument, 3 provided
aliens.cpp: In function 'long long int take_photos(int, int, int, std::vector<int>, std::vector<int>)':
aliens.cpp:103:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  103 |         ll mid = l + r >> 1;
      |                  ~~^~~