Submission #934373

#	Time	Username	Problem	Language	Result	Execution time	Memory
934373		vjudge1	Street Lamps (APIO19_street_lamps)	C++17	20 / 100	91 ms	12264 KiB

street_lamps

#include <bits/stdc++.h>
#include <fstream>
#define endl '\n'
#define mod 1000000007
#define INF 1000000000
#define INF2 2000000000000000000
//#define ll long long
///#define cin fin
///#define cout fout
using namespace std;
double const EPS = 1e-14;
///ofstream fout("herding.out");
///ifstream fin("herding.in");

int main()
{
    ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
    int n, q; cin >> n >> q;
    string s; cin >> s; int siz = s.size();
    int arr[siz], sum[siz] = {}, last[siz] = {};
    for(int i = 0; i < s.size(); i++) {
        arr[i] = s[i]-'0';
    }
    int cnt = 1;
    while(q--) {
        string ty; cin >> ty;
        if(ty == "toggle") {
            int x; cin >> x;
            sum[x-1] += (cnt-last[x-1])*arr[x-1];
            last[x-1] = cnt;
            arr[x-1] = abs(1-arr[x-1]);
        }
        else {
            int a, b; cin >> a >> b;
            sum[a-1] += (cnt-last[a-1])*arr[a-1];
            last[a-1] = cnt;
            cout << sum[a-1] << endl;
        }
        cnt++;
    }
    return 0;
}

Compilation message (stderr)

street_lamps.cpp: In function 'int main()':
street_lamps.cpp:21:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     for(int i = 0; i < s.size(); i++) {
      |                    ~~^~~~~~~~~~

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