제출 #318685

#제출 시각아이디문제언어결과실행 시간메모리
318685ec1117선물상자 (IOI15_boxes)C++17
10 / 100
1 ms512 KiB
// // Created on 11/2/2020. // #include "boxes.h" #include <iostream> #include <string> #include <vector> #include <algorithm> #include <sstream> #include <queue> #include <deque> #include <bitset> #include <iterator> #include <list> #include <stack> #include <map> #include <set> #include <functional> #include <numeric> #include <utility> #include <limits> #include <time.h> #include <math.h> #include <stdio.h> #include <string.h> #include <stdlib.h> #include <assert.h> #include <complex.h> #include <random> #include <chrono> using namespace std; typedef long long ll; typedef long double ld; typedef double db; typedef string str; typedef pair<int,int> pi; typedef pair<pi, int> pii; typedef pair<ll,ll> pl; typedef pair<db,db> pd; typedef vector<int> vi; typedef vector<bool> vb; typedef vector<ll> vl; typedef vector<db> vd; typedef vector<str> vs; typedef vector<pi> vpi; typedef vector<pl> vpl; typedef vector<pd> vpd; template<class T> using V = vector<T>; template<class T, size_t SZ> using AR = array<T,SZ>; #define mp make_pair #define f first #define s second #define sz(x) (int)(x).size() #define all(x) begin(x), end(x) #define rall(x) (x).rbegin(), (x).rend() #define sor(x) sort(all(x)) #define rsz resize #define ins insert #define ft front() #define bk back() #define pf push_front #define pb push_back #define eb emplace_back #define lb lower_bound #define ub upper_bound #define FOR(i,a,b) for (int i = (a); i < (b); ++i) #define F0R(i,a) FOR(i,0,a) #define For(i,a) FOR(i,0,a) #define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i) #define R0F(i,a) ROF(i,0,a) #define Rof(i,a) ROF(i,0,a) #define trav(a,x) for (auto& a: x) template<class T> bool ckmin(T& a, const T& b) { return b < a ? a = b, 1 : 0; } template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; } constexpr int pct(int x) { return __builtin_popcount(x); } constexpr int bits(int x) { return 31-__builtin_clz(x); } // floor(log2(x)) ll cdiv(ll a, ll b) { return a/b+((a^b)>0&&a%b); } // divide a by b rounded up ll fdiv(ll a, ll b) { return a/b-((a^b)<0&&a%b); } // divide a by b rounded down ll half(ll x) { return fdiv(x,2); } template<class T, class U> T fstTrue(T lo, T hi, U f) { // note: if (lo+hi)/2 is used instead of half(lo+hi) then this will loop infinitely when lo=hi hi ++; assert(lo <= hi); // assuming f is increasing while (lo < hi) { // find first index such that f is true T mid = half(lo+hi); f(mid) ? hi = mid : lo = mid+1; } return lo; } template<class T, class U> T lstTrue(T lo, T hi, U f) { lo --; assert(lo <= hi); // assuming f is decreasing while (lo < hi) { // find first index such that f is true T mid = half(lo+hi+1); f(mid) ? lo = mid : hi = mid-1; } return lo; } template<class T> void remDup(vector<T>& v) { sort(all(v)); v.erase(unique(all(v)),end(v)); } // INPUT template<class A> void re(complex<A>& c); template<class A, class B> void re(pair<A,B>& p); template<class A> void re(vector<A>& v); template<class A, size_t SZ> void re(array<A,SZ>& a); template<class T> void re(T& x) { cin >> x; } void re(db& d) { str t; re(t); d = stod(t); } void re(ld& d) { str t; re(t); d = stold(t); } template<class H, class... T> void re(H& h, T&... t) { re(h); re(t...); } template<class A> void re(complex<A>& c) { A a,b; re(a,b); c = {a,b}; } template<class A, class B> void re(pair<A,B>& p) { re(p.f,p.s); } template<class A> void re(vector<A>& x) { trav(a,x) re(a); } template<class A, size_t SZ> void re(array<A,SZ>& x) { trav(a,x) re(a); } // TO_STRING #define ts to_string str ts(char c) { return str(1,c); } str ts(const char* s) { return (str)s; } str ts(str s) { return s; } str ts(bool b) { #ifdef LOCAL return b ? "true" : "false"; #else return ts((int)b); #endif } template<class A> str ts(complex<A> c) { stringstream ss; ss << c; return ss.str(); } str ts(vector<bool> v) { str res = "{"; F0R(i,sz(v)) res += char('0'+v[i]); res += "}"; return res; } template<size_t SZ> str ts(bitset<SZ> b) { str res = ""; F0R(i,SZ) res += char('0'+b[i]); return res; } template<class A, class B> str ts(pair<A,B> p); template<class T> str ts(T v) { // containers with begin(), end() #ifdef LOCAL bool fst = 1; str res = "{"; for (const auto& x: v) { if (!fst) res += ", "; fst = 0; res += ts(x); } res += "}"; return res; #else bool fst = 1; str res = ""; for (const auto& x: v) { if (!fst) res += " "; fst = 0; res += ts(x); } return res; #endif } template<class A, class B> str ts(pair<A,B> p) { #ifdef LOCAL return "("+ts(p.f)+", "+ts(p.s)+")"; #else return ts(p.f)+" "+ts(p.s); #endif } // OUTPUT template<class A> void pr(A x) { cout << ts(x); } template<class H, class... T> void pr(const H& h, const T&... t) { pr(h); pr(t...); } void ps() { pr("\n"); } // print w/ spaces template<class H, class... T> void ps(const H& h, const T&... t) { pr(h); if (sizeof...(t)) pr(" "); ps(t...); } // DEBUG void DBG() { cerr << "]" << endl; } template<class H, class... T> void DBG(H h, T... t) { cerr << ts(h); if (sizeof...(t)) cerr << ", "; DBG(t...); } #ifdef LOCAL // compile with -DLOCAL, chk -> fake assert #define dbg(...) cerr << "Line(" << __LINE__ << ") -> [" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__) #define chk(...) if (!(__VA_ARGS__)) cerr << "Line(" << __LINE__ << ") -> function(" \ << __FUNCTION__ << ") -> CHK FAILED: (" << #__VA_ARGS__ << ")" << "\n", exit(0); #else #define dbg(...) 0 #define chk(...) 0 #endif int gcd(int a, int b) {if (b == 0)return a;return gcd(b, a % b);} int max(int a,int b, int c){return max(a,max(b,c));} int min(int a,int b, int c){return min(a,min(b,c));} ll max(ll a,ll b, ll c){return max(a,max(b,c));} ll min(ll a,ll b, ll c){return min(a,min(b,c));} // FILE I/O void setIn(str s) { freopen(s.c_str(),"r",stdin); } void setOut(str s) { freopen(s.c_str(),"w",stdout); } void unsyncIO() { cin.tie(0)->sync_with_stdio(0); } void setIO(str s = "") { unsyncIO(); // cin.exceptions(cin.failbit); // throws exception when do smth illegal // ex. try to read letter into int if (sz(s)) { setIn(s+".in"), setOut(s+".out"); } // for USACO } // 576743 29995400689069LL const int MOD = 1e9+7; // 998244353; const int MX = 1e7+5; const ll INF = 1e18; const ld PI = acos((ld)-1); const int xd[4] = {1,0,-1,0}, yd[4] = {0,1,0,-1}; mt19937 rng((uint32_t)chrono::steady_clock::now().time_since_epoch().count()); ll c1, c2=0; int p[MX]; int N; int dist(int x){ return min(x,N-x); } int calc(int l, int r){ int cnt=0; cnt+=dist(p[l]); FOR(i,l+1,r+1){ cnt+=min(dist(p[i])+dist(p[i-1]),p[i]-p[i-1]); } int cnt2=0; cnt2+=dist(p[r]); ROF(i,l,r){ cnt2+=min(dist(p[i])+dist(p[i+1]),p[i+1]-p[i]); } dbg(cnt,cnt2); return min(cnt+dist(p[r]),cnt2+dist(p[l])); } ll delivery(int n, int k, int l, int pos[]){ int extra=n%k; extra--; N=l; For(i,n)p[i]=pos[i]; if(extra==-1){ // for(int i=0;i<n;i+=k){ // c1+=min(l,2*min(pos[i+k-1],l-pos[i])); // } // c1+=min(l,2*min(pos[k-1],l-pos[0])); // return c1; return calc(0,n-1); } for(int i=0;i<n-extra-1;i+=k){ c1+=min(l,2*min(pos[i+k-1],l-pos[i])); } c1+=min(l,2*min(pos[n-1],l-pos[n-1-(extra)])); for(int i=n-1;i>extra;i-=k){ c2+=min(l,2*min(pos[i],l-pos[i-extra-1])); } c2+=min(l,2*min(pos[extra],l-pos[0])); // dbg(c1,c2); return(min(c1,c2)); } //int main() { // setIO(); // int arr[]={1,2,9}; // ps(delivery(3,3,10,arr)); // // you should actually read the stuff at the bottom //} /* stuff you should look for * int overflow, array bounds * special cases (n=1?) * think of simple solution first * do smth instead of nothing and stay organized * WRITE STUFF DOWN * DON'T GET STUCK ON ONE APPROACH */

컴파일 시 표준 에러 (stderr) 메시지

boxes.cpp: In function 'int calc(int, int)':
boxes.cpp:192:19: warning: statement has no effect [-Wunused-value]
  192 |  #define dbg(...) 0
      |                   ^
boxes.cpp:239:9: note: in expansion of macro 'dbg'
  239 |         dbg(cnt,cnt2);
      |         ^~~
boxes.cpp: In function 'void setIn(str)':
boxes.cpp:203:28: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  203 | void setIn(str s) { freopen(s.c_str(),"r",stdin); }
      |                     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
boxes.cpp: In function 'void setOut(str)':
boxes.cpp:204:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  204 | void setOut(str s) { freopen(s.c_str(),"w",stdout); }
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
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