Submission #753335

#	Time	Username	Problem	Language	Result	Execution time	Memory
753335		keta_tsimakuridze	Sum Zero (RMI20_sumzero)	C++14	61 / 100	526 ms	43352 KiB

sumzero

#include<bits/stdc++.h>
#define f first
#define s second
//#define int long long
#define pii pair<int,int>
using namespace std;
const int N = 4e5 + 5, mod = 1e9 + 7; // !
int t, R[N][20], a[N];
map<int,int> f;
main(){
    ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
    int n;
    cin >> n;
    for(int i = 1; i <= n; i++) {
        cin >> a[i]; a[i] += a[i - 1];
    }
    int mn = n + 1;
    for(int j = 0; j <= 19; j++) R[n + 1][j] = n + 1;
    for(int i = n; i >= 0; i--) {
        if(f[a[i]]) mn = min(mn, f[a[i]]);
        f[a[i]] = i;
        R[i][0] = mn;
        for(int j = 0 + 1; j < 20; j++) R[i][j] = R[R[i][j - 1]][j - 1];
    }
    int q;
    cin >> q;
    while(q--) {
        int l, r, ans = 0;
        cin >> l >> r; --l;
        for(int j = 19; j >= 0; j--) {
            if(R[l][j] <= r) ans += (1 << j), l = R[l][j];
        }
        cout << ans << "\n";
    }
 }

Compilation message (stderr)

sumzero.cpp:10:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   10 | main(){
      | ^~~~

• Subtask 1: 22 / 22
• Subtask 2: 39 / 39
• Subtask 3: 0 / 39