제출 #914948

#제출 시각아이디문제언어결과실행 시간메모리
914948yeediotCake 3 (JOI19_cake3)C++14
0 / 100
1 ms604 KiB
#include<bits/stdc++.h> using namespace std; #define int long long #define F first #define S second #define all(x) x.begin(),x.end() #define pii pair<int,int> #define pb push_back #define sz(x) (int)(x.size()) #define chmin(x,y) x=min(x,y) #define chmax(x,y) x=max(x,y) #define vi vector<int> #define vp vector<pii> #define vvi vector<vi> #define ykh mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count()) #define __lg(x) 63-__builtin_clzll(x) #define pow2(x) (1LL<<x) void __print(int x) {cerr << x;} void __print(float x) {cerr << x;} void __print(double x) {cerr << x;} void __print(long double x) {cerr << x;} void __print(char x) {cerr << '\'' << x << '\'';} void __print(const char *x) {cerr << '\"' << x << '\"';} void __print(const string &x) {cerr << '\"' << x << '\"';} void __print(bool x) {cerr << (x ? "true" : "false");} template<typename T, typename V> void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';} template<typename T> void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";} void _print() {cerr << "]\n";} template <typename T, typename... V> void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);} #ifdef local void setio(){freopen("/Users/iantsai/Library/Mobile Documents/com~apple~CloudDocs/cpp/Empty.md","r",stdin);} #define debug(x...) cerr << "[" << #x << "] = ["; _print(x) #else void setio(){} #define debug(x...) #endif void setIO(string s) { freopen((s + ".in").c_str(), "r", stdin); freopen((s + ".out").c_str(), "w", stdout); } struct line{ int a,b; int operator()(const int x)const{ return a*x+b; } }; bool check(line l1,line l2,line l3){ return (l3.b-l2.b)*(l1.a-l2.a)<=(l2.b-l1.b)*(l2.a-l3.a); } bool cmp(pii a,pii b){ return a.S<b.S; } signed main(){ setio(); ios::sync_with_stdio(0); cin.tie(0);cout.tie(0); int n,m; cin>>n>>m; vector<pii>vec; vec.pb({0,-8e18}); for(int i=1;i<=n;i++){ int v,c; cin>>v>>c; vec.pb({v,c}); } vector<int>pre(n+1); sort(all(vec),cmp); for(int i=1;i<=n;i++){ pre[i]=pre[i-1]+vec[i].F; } int ans=-8e18; for(int i=1;i<=n;i++){ set<int>mx; int cur=0; for(int j=i;j>0;j--){ if(sz(mx)==m){ cur-=*mx.begin(); mx.erase(mx.begin()); } mx.insert(vec[j].F); cur+=vec[j].F; if(sz(mx)==m)chmax(ans,cur+2*vec[j].S-2*vec[i].S); //debug(mx,cur,vec[j].S,vec[i].S,cur+2*vec[j].S-2*vec[i].S); } debug(ans); cout<<'\n'; } cout<<ans<<'\n'; } /* input: */

컴파일 시 표준 에러 (stderr) 메시지

cake3.cpp: In function 'void setIO(std::string)':
cake3.cpp:42:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cake3.cpp:43:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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