Submission #302801

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
302801	2020-09-19T08:37:30 Z	BlancaHM	Regions (IOI09_regions)	C++14	Compilation error	0 ms	0 KB

regions

#include <iostream>
#include <fstream>
#include <cfloat>
#include <iomanip>
#include <vector>
#include <algorithm>
#include <queue>
#include <stack>
#include <cstring>
#include <cmath>
#include <climits>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
using namespace std;
typedef pair<int, int> pii;
typedef long long int ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<vvi> vvvi;
typedef vector<vvvi> vvvvi;
typedef vector<pii> vpii;
typedef vector<vpii> vvpii;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<vvl> vvvl;
typedef vector<vvvl> vvvvl;
typedef vector<string> vs;
#define fir first
#define sec second
#define pb push_back
#define eb emplace_back
#define ppb pop_back
#define pf push_front
#define ppf pop_front
#define mp make_pair
#define len(v) ((int)v.size())
#define all(v) v.begin(), v.end()

vi country;
vvi G;
int N, R, e1, e2, ans;

int dfs(int S) {
	int cur = 0;
	for (auto v: G[S]) {
		cur += dfs(v);
		if (country[v] == e2) cur++;
	}
	if (country[S] == e1) ans += cur;
	return cur;
}

int main() {
	//ios::sync_with_stdio(false);
	//cin.tie(NULL);
	int Q, cn, sup;
	cin >> N >> R >> Q;
	G.assign(N, vi());
	country = vi(N);
	cin >> cn;
	country[0] = cn;
	map<pii, int> past;
	for (int i = 1; i < N; i++) {
		cin >> sup >> cn;
		G[sup-1].push_back(i);
		country[i] = cn;
	}
	while(Q--) {
		cin >> e1 >> e2;
		if (past.find(mp(e1, e2))) {
			cout << past[mp(e1, e2)] << "\n";
			continue;
		}
		ans = 0;
		dfs(0);
		cout << ans << "\n";
		past[mp(e1, e2)] = ans;
		cout.flush();
	}
	return 0;
}

Compilation message

regions.cpp: In function 'int main()':
regions.cpp:72:16: error: could not convert 'past.std::map<std::pair<int, int>, int>::find(std::make_pair<int&, int&>(e1, e2))' from 'std::map<std::pair<int, int>, int>::iterator' {aka 'std::_Rb_tree_iterator<std::pair<const std::pair<int, int>, int> >'} to 'bool'
   72 |   if (past.find(mp(e1, e2))) {
      |       ~~~~~~~~~^~~~~~~~~~~~
      |                |
      |                std::map<std::pair<int, int>, int>::iterator {aka std::_Rb_tree_iterator<std::pair<const std::pair<int, int>, int> >}