Submission #1099516

#	Time	Username	Problem	Language	Result	Execution time	Memory
1099516		Zero_OP	Street Lamps (APIO19_street_lamps)	C++14	20 / 100	5017 ms	524288 KiB

street_lamps

#include <bits/stdc++.h>

using namespace std;

#define rep(i, l, r) for(int i = (l), _r = (r); i < _r; ++i)
#define FOR(i, l, r) for(int i = (l), _r = (r); i <= _r; ++i)
#define ROF(i, r, l) for(int i = (r), _l = (l); i >= _l; --i)
#define all(v) begin(v), end(v)
#define compact(v) v.erase(unique(all(v)), end(v))
#define sz(v) (int)v.size()
#define dbg(x) "[" #x " = " << (x) << "]"

template<typename T>
bool minimize(T& a, const T& b){
    if(a > b) return a = b, true; return false;
}

template<typename T>
bool maximize(T& a, const T& b){
    if(a < b) return a = b, true; return false;
}

using ll = long long;
using ld = long double;

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
template<typename T> T random_int(T l, T r){ return uniform_int_distribution<T>(l, r)(rng); }
template<typename T> T random_real(T l, T r){ return uniform_real_distribution<T>(l, r)(rng); }

const int MAX = 3e5 + 5;
const int inf = 1e9 + 9;

int n, q;
string s;
set<pair<int, int>> onSegments;
ll ans[MAX];

void testcase(){
    cin >> n >> q >> s;
    s = '?' + s;

    vector<string> vers = {s};

    vector<int> queries;
    FOR(t, 1, q){
        string type;
        cin >> type;
        if(type == "toggle"){
            int i;
            cin >> i;

            s[i] = '0' + (s[i] - '0') ^ 1;
        } else{
            int l, r;
            cin >> l >> r;
            --r;

            int ans = 0;
            for(auto it : vers){
                bool ok = true;
                FOR(i, l, r){
                    ok &= (it[i] == '1');
                    if(!ok) break;
                }

                ans += ok;
            }

            cout << ans << '\n';
        }

        vers.push_back(s);
    }
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    #define filename "task"
    if(fopen(filename".inp", "r")){
        freopen(filename".inp", "r", stdin);
        freopen(filename".ans", "w", stdout);
    }

    int T = 1; //cin >> T;
    while(T--) testcase();

    return 0;
}

Compilation message (stderr)

street_lamps.cpp: In function 'bool minimize(T&, const T&)':
street_lamps.cpp:15:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   15 |     if(a > b) return a = b, true; return false;
      |     ^~
street_lamps.cpp:15:35: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   15 |     if(a > b) return a = b, true; return false;
      |                                   ^~~~~~
street_lamps.cpp: In function 'bool maximize(T&, const T&)':
street_lamps.cpp:20:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   20 |     if(a < b) return a = b, true; return false;
      |     ^~
street_lamps.cpp:20:35: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   20 |     if(a < b) return a = b, true; return false;
      |                                   ^~~~~~
street_lamps.cpp: In function 'void testcase()':
street_lamps.cpp:52:24: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   52 |             s[i] = '0' + (s[i] - '0') ^ 1;
      |                    ~~~~^~~~~~~~~~~~~~
street_lamps.cpp: In function 'int main()':
street_lamps.cpp:82:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   82 |         freopen(filename".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
street_lamps.cpp:83:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   83 |         freopen(filename".ans", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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