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Codeforces Round 791 (Div. 2)/B. Stone Age Problem.cpp

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+/* Problem URL: https://codeforces.com/contest/1679/problem/B */
+
+#include <bits/stdc++.h>
+
+using namespace std;
+
+#define V vector
+
+#define rmin(a, b) a = min(a, b)
+#define rmax(a, b) a = max(a, b)
+
+#define rep(i, lim) for (int i = 0; i < (lim); i++)
+#define nrep(i, s, lim) for (int i = s; i < (lim); i++)
+
+#define repv(i, v) for (auto &i : (v))
+#define fillv(v) for (auto &itr_ : (v)) { cin >> itr_; }
+#define sortv(v) sort(v.begin(), v.end())
+#define all(v) (v).begin(), (v).end()
+
+using vi = vector<int>;
+using vvi = vector<vi>;
+using vvvi = vector<vvi>;
+using vvvvi = vector<vvvi>;
+
+using ll = long long;
+
+using vl = vector<ll>;
+using vvl = vector<vl>;
+using vvvl = vector<vvl>;
+using vvvvl = vector<vvvl>;
+
+template<class v>
+auto operator<<(ostream &os, const vector<v> &vec)->ostream& {
+    os << vec[0];
+    for (size_t i = 1; i < vec.size(); i++) {
+        os << ' ' << vec[i];
+    }
+    os << '\n';
+    return os;
+}
+
+template<class v>
+auto operator>>(istream &is, vector<v> &vec)->istream& {
+    for (auto &i : vec) {
+        is >> i;
+    }
+    return is;
+}
+
+template<class v>
+auto operator<<(ostream &os, const vector<vector<v>> &vec)->ostream& {
+    for (auto &i : vec) {
+        os << i[0];
+        for (size_t j = 1; j < i.size(); j++) {
+            os << ' ' << i[j];
+        }
+        os << '\n';
+    }
+    return os;
+}
+
+template<class v>
+auto operator>>(istream  &is, vector<vector<v>> &vec)->istream& {
+    for (auto &i : vec) {
+        for (auto &j : i) {
+            is >> j;
+        }
+    }
+    return is;
+}
+
+int main()
+{
+    ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    int n, q;
+    cin >> n >> q;
+
+    vl fds(n);
+    cin >> fds;
+
+    ll total = accumulate(all(fds), 0LL);
+
+    vi versions(n, 0);
+
+    int ver = 0;
+    ll num = 0;
+
+    while (q--) {
+        int x;
+        cin >> x;
+
+        if (x == 1) {
+            int i;
+            ll nu;
+            cin >> i >> nu;
+            i--;
+
+            if (versions[i] < ver) {
+                total -= num;
+                total += nu;
+                versions[i] = ver;
+                fds[i] = nu;
+            } else {
+                total -= fds[i];
+                total += nu;
+                fds[i] = nu;
+            }
+        } else {
+            ll nu;
+            cin >> nu;
+
+            ver++;
+            num = nu;
+            total = num * n;
+        }
+
+        cout << total << '\n';
+    }
+}