Submission #1177054

#	Time	Username	Problem	Language	Result	Execution time	Memory
1177054		vibeduck	가로등 (APIO19_street_lamps)	C++20	20 / 100	91 ms	23620 KiB

street_lamps

#include <bits/stdc++.h> 
using namespace std;

#define pb push_back
#define pf push_front
#define mp make_pair
#define fi first
#define se second
#define int long long
#define all(x) (x).begin(), (x).end()

typedef long double ld;
typedef long long ll;
typedef pair<ll,ll> pll;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<bool> vb;
typedef vector<vector<int>> vvi;
typedef vector<vector<bool>> vvb;
typedef vector<vector<ll>> vvll;
typedef vector<string> vs;
typedef vector<vector<string>> vvs;
typedef vector<char> vc;
typedef vector<vector<char>> vvc;
typedef map<int, int> mii;
typedef unordered_map<int, int> umii;

const int mod = 1e9 + 7;
const int inf = INTMAX_MAX;
const bool tc = false;

inline void solve() {
    int n, q;
    cin >> n >> q;
    vi a(n); for (int i = 0; i < n; i++) {char x; cin >> x; a[i] = (x - '0');}
    vector<pair<int, vi>> switches(n);
    for (int i = 0; i < n; i++) {
        switches[i].fi = 0;
        switches[i].se.pb(0);
    }

    for (int t = 1; t <= q; t++) {
        string s; cin >> s;
        if (s[0] == 't') {
            int x; cin >> x; x--;
            a[x] = 1 - a[x];
            switches[x].se.pb(t);
            if (a[x] == 0) switches[x].fi += (switches[x].se[switches[x].se.size() - 1] - switches[x].se[switches[x].se.size() - 2]);
            continue;
        }
        int l, r; cin >> l >> r; l--; r -= 2;
        assert(l == r);
        cout << switches[l].fi + a[l] * (t - switches[l].se.back()) << '\n';
    } 
}

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

signed main() {
    ios::sync_with_stdio(false);
    cout.tie(0);
    cin.tie(0);
    //setIO();

    int t = 1;
    if (tc) {
        cin >> t;
    }

    while (t--) {
        solve();
    }
}

Compilation message (stderr)

street_lamps.cpp: In function 'void setIO(std::string)':
street_lamps.cpp:59:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
street_lamps.cpp:60:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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