제출 #421724

#제출 시각아이디문제언어결과실행 시간메모리
421724usachevd0비스킷 담기 (IOI20_biscuits)C++14
0 / 100
1108 ms337088 KiB
#include <bits/stdc++.h> #ifndef LOCAL #include "biscuits.h" #endif using namespace std; #define fi first #define se second #define mp make_pair #define pb push_back #define all(a) (a).begin(), (a).end() #define Time (clock() * 1.0 / CLOCKS_PER_SEC) using ll = long long; using ull = unsigned long long; using pii = pair<int, int>; using pil = pair<int, ll>; using pli = pair<ll, int>; using pll = pair<ll, ll>; using ld = long double; template<typename T1, typename T2> bool chkmin(T1& x, T2 y) { return y < x ? (x = y, true) : false; } template<typename T1, typename T2> bool chkmax(T1& x, T2 y) { return y > x ? (x = y, true) : false; } void debug_out() { cerr << endl; } template<typename T1, typename... T2> void debug_out(T1 A, T2... B) { cerr << ' ' << A; debug_out(B...); } template<typename T> void mdebug_out(T* a, int n) { for (int i = 0; i < n; ++i) cerr << a[i] << ' '; cerr << endl; } #ifdef LOCAL #define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__) #define mdebug(a, n) cerr << #a << ": ", mdebug_out(a, n) #else #define debug(...) 1337 #define mdebug(a, n) 1337 #endif template<typename T> ostream& operator << (ostream& stream, const vector<T>& v) { for (auto& e : v) stream << e << ' '; return stream; } template<typename T1, typename T2> ostream& operator << (ostream& stream, const pair<T1, T2>& p) { return stream << p.first << ' ' << p.second; } const ll INF64 = 1e18; ll count_tastiness_stu(ll x, vector<ll> a) { int k = a.size(); ll sum = 0; for (int i = 0; i < k; ++i) sum += (a[i] << i); auto good = [&](ll y) -> bool { vector<ll> b(all(a)); int j = k - 1; for (int i = k - 1; i >= 0; --i) { chkmin(j, i); if ((y >> i) & 1) { ll need = x; for (; j >= 0; --j) { if (b[j] >= need) { b[j] -= need; need = 0; break; } need -= b[j]; b[j] = 0; need *= 2; } if (need) return false; } } return true; }; ll ans = 1; for (ll y = 1; y <= 200000 && x * y <= sum; ++y) { ans += good(y); } return ans; } ll count_tastiness(ll x, vector<ll> a) { int k = a.size(); ll sum = 0; for (int i = 0; i < k; ++i) sum += (a[i] << i); ll ans = 0; int tot = 0; map<pair<vector<ll>, int>, ll> mem; function<ll(vector<ll>, int)> rec = [&](vector<ll> b, int i) -> ll { if (i == -1) return 1; pair<vector<ll>, int> key = {b, i}; if (mem.count(key)) return mem[key]; ll ans = rec(b, i - 1); ll need = x; for (int j = i; j >= 0; --j) { if (j >= b.size()) { need *= 2; if (need > INF64) break; continue; } if (b[j] >= need) { b[j] -= need; need = 0; break; } need -= b[j]; b[j] = 0; need *= 2; } if (!need) { ans += rec(b, i - 1); } return mem[key] = ans; }; return rec(a, 59); // ll ans = 1; // for (ll y = 1; y <= 200000 && x * y <= sum; ++y) { // ans += good(y); // } // return ans; } #ifdef LOCAL mt19937 rng(228); ll randll(ll L, ll R) { return rng() % (R - L + 1) + L; } int32_t main() { #ifdef LOCAL freopen("in", "r", stdin); #endif ios::sync_with_stdio(0); cin.tie(0); /*const ll C = 4; for (int test = 1; ; ++test) { ll x = 1; int k = 2; vector<ll> a(k); for (auto& x : a) x = randll(0, C); if (count_tastiness(x, a) != count_tastiness_stu(x, a)) { cout << "1\n"; cout << x << ' ' << k << '\n'; cout << a << '\n'; exit(0); } if (test % 1000 == 0) debug(test); }/**/ int q; assert(scanf("%d", &q) == 1); vector<int> k(q); vector<long long> x(q); vector<vector<long long>> a(q); vector<long long> results(q); for (int t = 0; t < q; t++) { assert(scanf("%d%lld", &k[t], &x[t]) == 2); a[t] = vector<long long>(k[t]); for (int i = 0; i < k[t]; i++) { assert(scanf("%lld", &a[t][i]) == 1); } } fclose(stdin); for (int t = 0; t < q; t++) { results[t] = count_tastiness(x[t], a[t]); } for (int t = 0; t < q; t++) { printf("%lld\n", results[t]); } fclose(stdout); return 0; } #endif

컴파일 시 표준 에러 (stderr) 메시지

biscuits.cpp:175:6: warning: "/*" within comment [-Wcomment]
  175 |     }/**/
      |       
biscuits.cpp: In lambda function:
biscuits.cpp:116:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  116 |             if (j >= b.size()) {
      |                 ~~^~~~~~~~~~~
biscuits.cpp: In function 'll count_tastiness(ll, std::vector<long long int>)':
biscuits.cpp:102:8: warning: unused variable 'ans' [-Wunused-variable]
  102 |     ll ans = 0;
      |        ^~~
biscuits.cpp:103:9: warning: unused variable 'tot' [-Wunused-variable]
  103 |     int tot = 0;
      |         ^~~
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