Submission #862528

#	Time	Username	Problem	Language	Result	Execution time	Memory
862528		blackslex	Sum Zero (RMI20_sumzero)	C++17	0 / 100	1 ms	600 KiB

sumzero

#include<bits/stdc++.h>

using namespace std;
using ll = long long;

ll n, q, x, y, cur = -1, a;
unordered_map<ll, ll> mp;

void solve(vector<ll> &par, vector<ll> &dep, vector<ll> &lf) {
    scanf("%lld %lld", &x, &y);
    ll ans = 0; x--;
    while (y && par[y] >= x) ans += (lf[y] >= x ? dep[y] - dep[lf[y]] : 1), y = (lf[y] >= x ? lf[y] : par[y]);
    printf("%lld\n", ans);
}

int main() {
    scanf("%lld", &n);
    vector<ll> par(n + 5, 0), dep(n + 5, 0), lf(n + 5, 0); dep[0] = 1;
    for (int i = 1; i <= n; i++) {
        scanf("%lld", &x); a += x;
        if (!a || mp[a]) cur = max(cur, mp[a]);
        mp[a] = i; par[i] = cur; dep[i] = (~cur ? dep[par[i]] + 1 : 1); lf[i] = (~cur && dep[par[i]] - dep[lf[par[i]]] == dep[lf[par[i]]] - dep[lf[lf[par[i]]]] ? lf[lf[par[i]]] : par[i]);
    }
    scanf("%lld", &q);
    while (q--) solve(par, dep, lf);
}

Compilation message (stderr)

sumzero.cpp: In function 'void solve(std::vector<long long int>&, std::vector<long long int>&, std::vector<long long int>&)':
sumzero.cpp:10:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     scanf("%lld %lld", &x, &y);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~
sumzero.cpp: In function 'int main()':
sumzero.cpp:17:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |     scanf("%lld", &n);
      |     ~~~~~^~~~~~~~~~~~
sumzero.cpp:20:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |         scanf("%lld", &x); a += x;
      |         ~~~~~^~~~~~~~~~~~
sumzero.cpp:24:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |     scanf("%lld", &q);
      |     ~~~~~^~~~~~~~~~~~

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