Submission #1044634

#	Time	Username	Problem	Language	Result	Execution time	Memory
1044634		vjudge1	Street Lamps (APIO19_street_lamps)	C++17	20 / 100	462 ms	22256 KiB

street_lamps

#include <bits/stdc++.h>
using std::cin, std::cout, std::vector, std::set, std::endl, std::string, std::map,std::pair,std::queue;

#ifdef LOCAL
#define file freopen("in.txt","r",stdin);freopen("out.txt","w",stdout);
#else
#define file ;;
#endif

#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;

template <typename T>
using Tree = tree<T, null_type, std::less<T>, rb_tree_tag, tree_order_statistics_node_update>;

#include <random>

int main(){
	file;
	int n,q;
	cin >> n >> q;
	string s;
	cin >> s;
	vector<vector<int>> hist(n+1,vector<int>(1,0));
	for(int i=1;i<=q;i++){
		string ty;
		cin >> ty;
		if(ty[0]=='q'){
			int a,b;
			cin >> a >> b;
			--a;
			--b;
			int ans = (((s[a]=='1' && hist[a].size()%2==1) || (s[a]=='0' && hist[a].size()%2==0)) ? i-hist[a].back():0);
			for(int i=(s[a]=='0')+1;i<hist[a].size();i+=2){
				ans+=hist[a][i]-hist[a][i-1];
			}
			cout << ans << endl;
		}
		else if(ty[0]=='t'){
			int a;
			cin >> a;
			hist[a-1].push_back(i);
		}

	}
	return 0;
}

Compilation message (stderr)

street_lamps.cpp: In function 'int main()':
street_lamps.cpp:34:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |    for(int i=(s[a]=='0')+1;i<hist[a].size();i+=2){
      |                            ~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 20
• Subtask 2: 20 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20