Submission #838302

#	Time	Username	Problem	Language	Result	Execution time	Memory
838302		mat_jur	Secret (JOI14_secret)	C++14	100 / 100	404 ms	4440 KiB

secret

#include <bits/stdc++.h>
#ifndef LOCAL 
#include "secret.h"
#else
int Secret(int x, int y) {return x+y;}
#endif
using namespace std;
#ifdef DEBUG
auto&operator<<(auto &o, pair<auto, auto> p) {o << "(" << p.first << ", " << p.second << ")"; return o;}
auto operator<<(auto &o, auto x)->decltype(x.end(), o) {o<<"{"; for(auto e : x) o<<e<<", "; return o<<"}";}
#define debug(X) cerr << "["#X"]: " << X << '\n';
#else 
#define debug(X) ;
#endif
#define ll long long
#define all(v) (v).begin(), (v).end()
#define FOR(i,l,r) for(int i=(l);i<=(r);++i)
#define REP(i,n) FOR(i,0,(n)-1)
#define ssize(x) int(x.size())
#define fi first
#define se second

vector<vector<int>> lef, rig; 
vector<int> v;
int n;

void Init(int N, int A[]) {
	v.resize(N);
	n = N;
	REP(i, N) v[i] = A[i];
	function<void(int, int, int)> solve = [&](int l, int r, int d) {
		cerr << d << "   " << l << ' ' << r << '\n';
		if (r == l) {
			return;
		}
		int mid = (l+r)/2;
		if (lef.size() < d+1) {lef.resize(d+1); rig.resize(d+1); lef[d].resize(N); rig[d].resize(N);}
		lef[d][mid] = v[mid];
		for (int i = mid-1; i >= l; i--) {
			lef[d][i] = Secret(v[i], lef[d][i+1]);	
		}
		rig[d][mid+1] = v[mid+1];
		FOR(i, mid+2, r) {
			rig[d][i] = Secret(rig[d][i-1], v[i]);
		}
		solve(l, mid, d+1); solve(mid+1, r, d+1);
	};
	solve(0, N-1, 0);
	debug(lef);
	debug(rig);
}

int Query(int L, int R) {
	int l = 0, r = n-1, d = 0;
	if (L == R) return v[L];
	while (l < r) {
		int mid = (l+r)/2;
		if (L <= mid && mid < R) return Secret(lef[d][L], rig[d][R]);
		if (R <= mid) r = mid;
		else l = mid+1;
		d++;
	}
	return v[L];
}

#ifdef LOCAL
int main() {
	int n;
	cin >> n;
	int a[n];
	REP(i, n) cin >> a[i];
	Init(n, a);
	int q;
	cin >> q;
	while (q--) {
		int l, r;
		cin >> l >> r;
		cout << Query(l, r) << '\n';
	}

	return 0;
};
#endif

Compilation message (stderr)

secret.cpp: In lambda function:
secret.cpp:37:18: warning: comparison of integer expressions of different signedness: 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   37 |   if (lef.size() < d+1) {lef.resize(d+1); rig.resize(d+1); lef[d].resize(N); rig[d].resize(N);}
      |       ~~~~~~~~~~~^~~~~

• Subtask 1: 100 / 100