Submission #983223

#	Time	Username	Problem	Language	Result	Execution time	Memory
983223		vjudge1	Street Lamps (APIO19_street_lamps)	C++17	40 / 100	74 ms	25436 KiB

street_lamps

#include <time.h>
#include <cstdlib>
#include <stack>
#include <numeric>
#include <unordered_map>
#include <unordered_set>
#include <iomanip>
#include <map>
#include <set>
#include <iterator>
#include <deque>
#include <queue>
#include <sstream>
#include <array>
#include <string>
#include <tuple>
#include <chrono>
#include <cassert>
#include <cstdio>
#include <cstring>
#include <list>
#include <iostream>
#include <vector>
#include <cmath>
#include <algorithm>
#include <bitset>

using namespace std;

int tt = 1, n;
string s;
int k[1001][1001];
int last[300005], kol[300005], l[300005], r[300005];
string type[300005];
int mx[4 * 300005];
void up(int l, int r, int ind, int num, int v){
    if(l > ind || r < ind) return;
    if(l == r){
        mx[v] = num;
        return;
    }
    int mid = (l + r) / 2;
    up(l, mid, ind, num, v * 2);
    up(mid + 1, r, ind, num, v * 2 + 1);
    mx[v] = max(mx[v * 2], mx[v * 2 + 1]);
}
int get_mx(int l, int r, int l1, int r1, int v){
    if(l > r1 || l1 > r) return 0;
    if(l >= l1 && r1 >= r) return mx[v];
    int mid = (l + r) / 2;
    return max(get_mx(l, mid, l1, r1, v * 2), get_mx(mid + 1, r, l1, r1, v * 2 + 1));
}

int main(){
    ios::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    cin >> n >> tt;
    cin >> s;
    if(n <= 100 && tt <= 100){
        while(tt--){
            string ss;
            cin >> ss;
            for(int i = 1; i <= n; i++){
                for(int j = i + 1; j <= n + 1; j++){
                    if(s[j - 2] == '1') k[i][j]++;
                    else break;
                }
            }
            if(ss[0] == 'q'){
                int a, b;
                cin >> a >> b;
                cout << k[a][b] << "\n";
            }
            else{
                int p;
                cin >> p;
                if(s[p - 1] == '0') s[p - 1] = '1';
                else s[p - 1] = '0';

            }
        }
        return 0;
    }
    bool f = 0;
    for(int i = 1; i <= tt; i++){
        cin >> type[i] >> l[i];
        if(type[i][0] == 'q') cin >> r[i];
        if(type[i][0] == 'q' && r[i] - 1 != l[i]) f = 1;
    }
    if(!f){
        for(int i = 1; i <= tt; i++){
            if(type[i][0] == 'q'){
                int num = kol[l[i]];
                if(s[l[i] - 1] == '1') num += (i - last[l[i]]);
                cout << num << "\n";
            }
            else{
                if(s[l[i] - 1] == '1'){
                    kol[l[i]] += (i - last[l[i]]);
                    last[l[i]] = i;
                    s[l[i] - 1] = '0';
                }
                else{
                    last[l[i]] = i;
                    s[l[i] - 1] = '1';
                }
            }
        }
        return 0;
    }
    cout << 1 / 0;
    for(int i = 0; i < n; i++){
        if(s[i] == '0')
            up(1, n, i + 1, 1e9, 1);
    }
    for(int i = 1; i <= tt; i++){
        if(type[i][0] == 'q'){
            cout << max(0, i - get_mx(1, n, l[i], r[i] - 1, 1)) << "\n";
        }
        else{
            up(1, n, i, l[i], 1);
        }
    }
}

Compilation message (stderr)

street_lamps.cpp: In function 'int main()':
street_lamps.cpp:111:15: warning: division by zero [-Wdiv-by-zero]
  111 |     cout << 1 / 0;
      |             ~~^~~

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