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F - Operations on a Matrix

https://atcoder.jp/contests/abc253/submissions/35160697
This commit is contained in:
Baoshuo Ren 2022-09-25 18:51:42 +08:00
parent a2b5c850ee
commit 2204c5110c
Signed by: baoshuo
GPG Key ID: 00CB9680AB29F51A
69 changed files with 307 additions and 0 deletions

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#include <iostream>
#include <tuple>
#include <vector>
using std::cin;
using std::cout;
const char endl = '\n';
const int N = 2e5 + 5;
int n, m, q, idx, cnt, lst[N];
long long c[N], val[N], ans[N];
std::vector<std::tuple<int, int, int>> changes;
std::vector<std::tuple<int, int, bool>> queries[N];
int lowbit(int x) {
return x & -x;
}
void add(int x, int y) {
for (; x <= m; x += lowbit(x)) c[x] += y;
}
long long sum(int x) {
long long res = 0;
for (; x; x -= lowbit(x)) res += c[x];
return res;
}
int main() {
std::ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n >> m >> q;
changes.emplace_back(1, n, 0);
for (int i = 1; i <= q; i++) {
int op;
cin >> op;
switch (op) {
case 1: {
int l, r, x;
cin >> l >> r >> x;
changes.emplace_back(l, r, x);
idx++;
break;
}
case 2: {
int i, x;
cin >> i >> x;
lst[i] = idx;
val[i] = x;
break;
}
case 3: {
int i, j;
cin >> i >> j;
ans[++cnt] = val[i];
queries[lst[i]].emplace_back(j, cnt, false);
queries[idx].emplace_back(j, cnt, true);
break;
}
}
}
for (int i = 0; i < changes.size(); i++) {
int l, r, x;
std::tie(l, r, x) = changes[i];
add(l, x);
add(r + 1, -x);
for (auto query : queries[i]) {
int pos, id, type;
std::tie(pos, id, type) = query;
if (type) ans[id] += sum(pos);
else ans[id] -= sum(pos);
}
}
for (int i = 1; i <= cnt; i++) {
cout << ans[i] << endl;
}
return 0;
}

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