Submission #338720

#	Time	Username	Problem	Language	Result	Execution time	Memory
338720		FlashGamezzz	Savez (COCI15_savez)	C++17	108 / 120	148 ms	65540 KiB

savez

#include <iostream>
#include <cstdlib>
#include <cstdio>
#include <fstream>
#include <algorithm>
#include <utility>
#include <vector>
#include <iostream>
#include <string>
#include <unordered_map>

using namespace std;

int n, p = 31, m = 1000000009;
vector< vector<long long> > ph, sh;

int main() {
	ios_base::sync_with_stdio(false); cin.tie(NULL); cin >> n;
	long long pow = 1, h = 0;
	vector<long long> temp;
	for (int i = 0; i < n; i++){
		string a; cin >> a;
		pow = 1, h = 0; temp.clear();
		for (int j = 0; j < a.length(); j++) {
			h += (a[j]-'A'+1)*pow; h %= m;
			temp.push_back(h); pow *= p; pow %= m;
		}
		ph.push_back(temp); h = 0; temp.clear();
		for (int j = a.length()-1; j >= 0; j--) {
			h *= p; h %= m; h += (a[j]-'A'+1); h %= m;
			temp.push_back(h);
		}
		sh.push_back(temp);
	}
	unordered_map<long long, int> subsq;
	int ans = 0;
	for (int i = 0; i < n; i++){
		int mv = 0;
		for (int j = 0; j < ph[i].size(); j++){
			if (ph[i][j] == sh[i][j]){
				unordered_map<long long, int>::iterator it = subsq.find(ph[i][j]);
				if (it != subsq.end()){
					mv = max(mv, it->second);
				}
			}
		}
		subsq[ph[i][ph[i].size()-1]] = mv+1; ans = max(ans, mv+1);
	}
	cout << ans << endl;
}

Compilation message (stderr)

savez.cpp: In function 'int main()':
savez.cpp:24:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |   for (int j = 0; j < a.length(); j++) {
      |                   ~~^~~~~~~~~~~~
savez.cpp:39:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |   for (int j = 0; j < ph[i].size(); j++){
      |                   ~~^~~~~~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 12 / 12
• Subtask 3: 12 / 12
• Subtask 4: 12 / 12
• Subtask 5: 12 / 12
• Subtask 6: 12 / 12
• Subtask 7: 12 / 12
• Subtask 8: 12 / 12
• Subtask 9: 12 / 12
• Subtask 10: 0 / 12