제출 #1048860

#제출 시각아이디문제언어결과실행 시간메모리
1048860RecursiveCoBikeparking (EGOI24_bikeparking)C++17
100 / 100
231 ms25332 KiB
// CF template, version 3.0 #include <bits/stdc++.h> using namespace std; #define improvePerformance ios_base::sync_with_stdio(false); cin.tie(0) #define getTest int t; cin >> t #define eachTest for (int _var=0;_var<t;_var++) #define get(name) int (name); cin >> (name) #define out(o) cout << (o) #define getList(cnt, name) vector<int> (name); for (int _=0;_<(cnt);_++) { get(a); (name).push_back(a); } #define sortl(name) sort((name).begin(), (name).end()) #define rev(name) reverse((name).begin(), (name).end()) #define forto(name, var) for (int (var) = 0; (var) < (name); (var)++) #define decision(b) if (b){out("YES");}else{out("NO");} //#define int long long int template <typename T, typename I> struct segtree { int n; vector<T> tree; vector<I> initial; T id; segtree(int i_n, vector<I> i_initial, T i_id): n(i_n), initial(i_initial), id(i_id) { tree.resize(4 * n); } T conquer(T left, T right) { // write your conquer function } T value(I inp) { // write your value function } void build(int v, int l, int r) { if (l == r) tree[v] = value(initial[l]); else { int middle = (l + r) / 2; build(2 * v, l, middle); build(2 * v + 1, middle + 1, r); tree[v] = conquer(tree[2 * v], tree[2 * v + 1]); } } void upd(int v, int l, int r, int i, I x) { if (l == r) tree[v] = value(x); else { int middle = (l + r) / 2; if (middle >= i) upd(2 * v, l, middle, i, x); else upd(2 * v + 1, middle + 1, r, i, x); tree[v] = conquer(tree[2 * v], tree[2 * v + 1]); } } T query(int v, int l, int r, int ql, int qr) { if (ql <= l && r <= qr) return tree[v]; else if (r < ql || qr < l) return id; int middle = (l + r) / 2; T left = query(2 * v, l, middle, ql, qr); T right = query(2 * v + 1, middle + 1, r, ql, qr); return conquer(left, right); } }; // vector<int> vector<int> X; vector<int> Y; int evalfast(int middle) { int n = X.size(); // = Y.size() int bad = 0; int neutral = 0; int suf = 0; int ptr; int only; for (int i = n - 1; i >= 0; i--) { if (suf + Y[i] >= middle + 1) { ptr = i; only = middle + 1 - suf; break; } suf += Y[i]; } int xpref = 0; int ypref = 0; bool active = true; forto(n, i) { if (xpref >= middle + 1) break; if (X[i] == 0) continue; if (ypref <= xpref) { while (ptr < n) { int here = active? only: Y[ptr]; active = false; ypref += here; ptr++; if (ypref > xpref) break; } } if (i > ptr - 1) bad++; else if (i == ptr - 1) neutral++; xpref += X[i]; } if (bad) return -1; return neutral; } pair<int, int> evalslow(int middle) { vector<array<int, 3>> events; int pref = 0; int n = X.size(); // = Y.size() forto(n, i) { if (pref >= middle + 1) break; events.push_back({pref, 0, i}); pref += X[i]; } int suf = 0; for (int i = n - 1; i >= 0; i--) { if (suf >= middle + 1) break; suf += Y[i]; events.push_back({max(0, middle + 1 - suf), 1, i}); } sortl(events); int bad = 0; int nvals = 0; int neutral = 0; int x = 0; int y = 0; int ptr = 0; int s = events.size(); int val = 0; while (ptr < s) { while (ptr < s && events[ptr][0] == val) { int typ = events[ptr][1]; int setto = events[ptr][2]; if (typ) y = setto; else x = setto; ptr++; } if (y < x) bad++; else if (y == x) nvals++, neutral += (ptr < s? events[ptr][0]: middle + 1) - val; if (ptr < s) val = events[ptr][0]; } if (bad) return {-1, -1}; return {nvals, neutral}; } signed main() { improvePerformance; get(n); forto(n, i) { get(x); X.push_back(x); } forto(n, i) { get(y); Y.push_back(y); } int ysum = 0; forto(n, i) ysum += Y[i]; if (ysum == 0) { out(0); return 0; } int xsum = 0; forto(n, i) { if (xsum + X[i] >= ysum) { X[i] = ysum - xsum; break; } xsum += X[i]; } int l = 0; int r = ysum; while (r - l > 1) { int middle = (l + r) / 2; int value = evalfast(middle); if (value == -1 || value > 2) r = middle; else l = middle; } if (evalslow(l).second == -1) out(-ysum); else out((l + 1) - (ysum - (l + 1)) - evalslow(l).second); }

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'int evalfast(int)':
Main.cpp:15:35: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   15 | #define forto(name, var) for (int (var) = 0; (var) < (name); (var)++)
      |                                   ^
Main.cpp:92:5: note: in expansion of macro 'forto'
   92 |     forto(n, i) {
      |     ^~~~~
Main.cpp: In function 'std::pair<int, int> evalslow(int)':
Main.cpp:15:35: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   15 | #define forto(name, var) for (int (var) = 0; (var) < (name); (var)++)
      |                                   ^
Main.cpp:116:5: note: in expansion of macro 'forto'
  116 |     forto(n, i) {
      |     ^~~~~
Main.cpp: In function 'int main()':
Main.cpp:10:23: warning: unnecessary parentheses in declaration of 'n' [-Wparentheses]
   10 | #define get(name) int (name); cin >> (name)
      |                       ^
Main.cpp:154:5: note: in expansion of macro 'get'
  154 |     get(n);
      |     ^~~
Main.cpp:15:35: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   15 | #define forto(name, var) for (int (var) = 0; (var) < (name); (var)++)
      |                                   ^
Main.cpp:155:5: note: in expansion of macro 'forto'
  155 |     forto(n, i) {
      |     ^~~~~
Main.cpp:10:23: warning: unnecessary parentheses in declaration of 'x' [-Wparentheses]
   10 | #define get(name) int (name); cin >> (name)
      |                       ^
Main.cpp:156:9: note: in expansion of macro 'get'
  156 |         get(x);
      |         ^~~
Main.cpp:15:35: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   15 | #define forto(name, var) for (int (var) = 0; (var) < (name); (var)++)
      |                                   ^
Main.cpp:159:5: note: in expansion of macro 'forto'
  159 |     forto(n, i) {
      |     ^~~~~
Main.cpp:10:23: warning: unnecessary parentheses in declaration of 'y' [-Wparentheses]
   10 | #define get(name) int (name); cin >> (name)
      |                       ^
Main.cpp:160:9: note: in expansion of macro 'get'
  160 |         get(y);
      |         ^~~
Main.cpp:15:35: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   15 | #define forto(name, var) for (int (var) = 0; (var) < (name); (var)++)
      |                                   ^
Main.cpp:164:5: note: in expansion of macro 'forto'
  164 |     forto(n, i) ysum += Y[i];
      |     ^~~~~
Main.cpp:15:35: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   15 | #define forto(name, var) for (int (var) = 0; (var) < (name); (var)++)
      |                                   ^
Main.cpp:170:5: note: in expansion of macro 'forto'
  170 |     forto(n, i) {
      |     ^~~~~
Main.cpp: In function 'int evalfast(int)':
Main.cpp:99:23: warning: 'only' may be used uninitialized in this function [-Wmaybe-uninitialized]
   99 |                 ypref += here;
      |                 ~~~~~~^~~~~~~
Main.cpp:96:24: warning: 'ptr' may be used uninitialized in this function [-Wmaybe-uninitialized]
   96 |             while (ptr < n) {
      |                    ~~~~^~~
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