oj.uz

Submission #942803

# Submission time Handle Problem Language Result Execution time Memory
942803 2024-03-11T04:52:12 Z marvinthang Sum Zero (RMI20_sumzero) C++17
100 / 100
 263 ms 17788 KB 
/*************************************
*    author: marvinthang             *
*    created: 11.03.2024 10:42:17    *
*************************************/
 
#include <bits/stdc++.h>
 
using namespace std;
 
#define                  fi  first
#define                  se  second
#define                left  ___left
#define               right  ___right
#define                TIME  (1.0 * clock() / CLOCKS_PER_SEC)
#define             MASK(i)  (1LL << (i))
#define           BIT(x, i)  ((x) >> (i) & 1)
#define  __builtin_popcount  __builtin_popcountll
#define              ALL(v)  (v).begin(), (v).end()
#define           REP(i, n)  for (int i = 0, _n = (n); i < _n; ++i)
#define          REPD(i, n)  for (int i = (n); i-- > 0; )
#define        FOR(i, a, b)  for (int i = (a), _b = (b); i < _b; ++i) 
#define       FORD(i, b, a)  for (int i = (b), _a = (a); --i >= _a; ) 
#define       FORE(i, a, b)  for (int i = (a), _b = (b); i <= _b; ++i) 
#define      FORDE(i, b, a)  for (int i = (b), _a = (a); i >= _a; --i) 
#define        scan_op(...)  istream & operator >> (istream &in, __VA_ARGS__ &u)
#define       print_op(...)  ostream & operator << (ostream &out, const __VA_ARGS__ &u)
#ifdef LOCAL
    #include "debug.h"
#else
    #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
    #define DB(...) 23
    #define db(...) 23
    #define debug(...) 23
#endif
 
template <class U, class V> scan_op(pair <U, V>)  { return in >> u.first >> u.second; }
template <class T> scan_op(vector <T>)  { for (size_t i = 0; i < u.size(); ++i) in >> u[i]; return in; }
template <class U, class V> print_op(pair <U, V>)  { return out << '(' << u.first << ", " << u.second << ')'; }
template <size_t i, class T> ostream & print_tuple_utils(ostream &out, const T &tup) { if constexpr(i == tuple_size<T>::value) return out << ")";  else return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup); }
template <class ...U> print_op(tuple<U...>) { return print_tuple_utils<0, tuple<U...>>(out, u); }
template <class Con, class = decltype(begin(declval<Con>()))> typename enable_if <!is_same<Con, string>::value, ostream&>::type operator << (ostream &out, const Con &con) { out << '{'; for (__typeof(con.begin()) it = con.begin(); it != con.end(); ++it) out << (it == con.begin() ? "" : ", ") << *it; return out << '}'; }
 
// end of template
 
void process(void) {
	int n; cin >> n;
	vector <int> left(n + 2); REP(i, n) cin >> left[i];
	map <long long, int> last;
	long long cur = 0;
	vector <int> nxt(n + 2, n + 1);
	last[0] = n;
	REPD(i, n) {
		cur += left[i];
		if (last.count(cur)) nxt[i] = last[cur];
		last[cur] = i;
	}
	last.clear();
	fill(ALL(left), 0);
	vector <int> right(n + 2, -1);
	REPD(i, n + 1) {
		nxt[i] = min(nxt[i], nxt[i + 1]);
		left[nxt[i]] = i;
		if (right[nxt[i]] == -1) right[nxt[i]] = i;
	}
	int q; cin >> q;
	vector <int> qr(q), prv(q);
	fill(ALL(nxt), -1);
	REP(i, q) {
		int l;
		cin >> l >> qr[i]; --l;
		prv[i] = nxt[l];
		nxt[l] = i;
	}
	vector <int> res(q), list_vertices;
	list_vertices.reserve(n + 2);
	list_vertices.push_back(n + 1);
	while (!list_vertices.empty()) {
		int u = list_vertices.back();
		if (left[u] <= right[u]) list_vertices.push_back(left[u]++);
		else {
			for (int i = nxt[u]; i >= 0; i = prv[i]) {
				auto p = partition_point(ALL(list_vertices), [&] (int x) { return x >= qr[i]; });
				res[i] = list_vertices.end() - p - 1 + (*prev(p) == qr[i]);
			}
			list_vertices.pop_back();
		}
	}
	REP(i, q) cout << res[i] << '\n';
}
 
int main(void) {
	ios_base::sync_with_stdio(false); cin.tie(nullptr); // cout.tie(nullptr);
	file("sumzero");
	// int t; cin >> t; while (t--)
	process();
	// cerr << "Time elapsed: " << TIME << " s.\n";
	return (0^0);
}

Compilation message

sumzero.cpp: In function 'int main()':
sumzero.cpp:30:61: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sumzero.cpp:93:2: note: in expansion of macro 'file'
   93 |  file("sumzero");
      |  ^~~~
sumzero.cpp:30:94: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                                                       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
sumzero.cpp:93:2: note: in expansion of macro 'file'
   93 |  file("sumzero");
      |  ^~~~

Subtask #1
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 600 KB Output is correct
2 Correct 2 ms 604 KB Output is correct
3 Correct 3 ms 604 KB Output is correct
4 Correct 3 ms 604 KB Output is correct
5 Correct 2 ms 604 KB Output is correct
6 Correct 3 ms 688 KB Output is correct

Subtask #2
39.0 / 39.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 600 KB Output is correct
2 Correct 2 ms 604 KB Output is correct
3 Correct 3 ms 604 KB Output is correct
4 Correct 3 ms 604 KB Output is correct
5 Correct 2 ms 604 KB Output is correct
6 Correct 3 ms 688 KB Output is correct
7 Correct 48 ms 4048 KB Output is correct
8 Correct 55 ms 4616 KB Output is correct
9 Correct 52 ms 3444 KB Output is correct
10 Correct 51 ms 4036 KB Output is correct
11 Correct 69 ms 3840 KB Output is correct
12 Correct 55 ms 3408 KB Output is correct

Subtask #3
39.0 / 39.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 600 KB Output is correct
2 Correct 2 ms 604 KB Output is correct
3 Correct 3 ms 604 KB Output is correct
4 Correct 3 ms 604 KB Output is correct
5 Correct 2 ms 604 KB Output is correct
6 Correct 3 ms 688 KB Output is correct
7 Correct 48 ms 4048 KB Output is correct
8 Correct 55 ms 4616 KB Output is correct
9 Correct 52 ms 3444 KB Output is correct
10 Correct 51 ms 4036 KB Output is correct
11 Correct 69 ms 3840 KB Output is correct
12 Correct 55 ms 3408 KB Output is correct
13 Correct 218 ms 15800 KB Output is correct
14 Correct 263 ms 17644 KB Output is correct
15 Correct 236 ms 12944 KB Output is correct
16 Correct 229 ms 17788 KB Output is correct
17 Correct 222 ms 14524 KB Output is correct
18 Correct 244 ms 12980 KB Output is correct