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3.cpp
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119 lines (101 loc) · 2.6 KB
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// #include <bits/stdc++.h>
// using namespace std;
// int main() {
// int n, Q;
// cin >> n >> Q;
// vector<int> ans(n);
// for (int i = 0; i < n; i++) {
// cin >> ans[i];
// }
// while (Q--) {
// long long sum = 0;
// int type;
// cin >> type;
// if (type == 1) {
// int c;
// cin >> c;
// rotate(ans.begin(), ans.begin() + c, ans.end());
// } else {
// int l, r;
// cin >> l >> r;
// for (int i = l - 1; i <= r - 1; i++) {
// sum += ans[i];
// }
// cout << sum << endl;
// }
// }
// }
// optimized code
#include <bits/stdc++.h>
using namespace std;
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n, Q;
cin >> n >> Q;
vector<long long> A(n), prefix(n+1, 0);
for (int i = 0; i < n; i++) {
cin >> A[i];
prefix[i+1] = prefix[i] + A[i];
}
int shift = 0;
while (Q--) {
int type;
cin >> type;
if (type == 1) {
int c;
cin >> c;
shift = (shift + c) % n;
} else {
int l, r;
cin >> l >> r;
int realL = (shift + (l-1)) % n;
int realR = (shift + (r-1)) % n;
long long ans = 0;
if (realL <= realR) {
ans = prefix[realR+1] - prefix[realL];
} else {
ans = (prefix[n] - prefix[realL]) + prefix[realR+1];
}
cout << ans << endl;
}
}
}
//another way
#include <bits/stdc++.h>
using namespace std;
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int N, Q;
cin >> N >> Q;
vector<long long> A(N + 1);
for (int i = 1; i <= N; i++) cin >> A[i];
vector<long long> prefix(N + 1, 0);
for (int i = 1; i <= N; i++) prefix[i] = prefix[i - 1] + A[i];
long long S = 0;
long long mod = N;
for (int q = 0; q < Q; q++) {
int type;
cin >> type;
if (type == 1) {
long long c;
cin >> c;
S = (S + c) % mod;
} else {
long long l, r;
cin >> l >> r;
long long K = r - l + 1;
long long sp = (S + l - 1) % mod + 1;
long long ep = sp + K - 1;
long long sum = 0;
if (ep <= N) {
sum = prefix[ep] - prefix[sp - 1];
} else {
sum = prefix[N] - prefix[sp - 1] + prefix[ep - N];
}
cout << sum << '\n';
}
}
return 0;
}