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fix(mn1009t2): 修复队列处理逻辑中的数量更新错误
修正队列处理时未正确更新剩余数量的问题,确保计算准确 添加测试用例和性能优化实现
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@ -7,7 +7,7 @@ using ll = int64_t;
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const ll maxn = 2e6+5;
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ll n,m,v,d[maxn],p[maxn],ans=0;
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std::deque<std::pair<ll, ll>> dq; // 价钱,剩余
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std::deque<std::pair<ll, ll>> dq; // 价钱,剩余个数
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int main(){
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std::iostream::sync_with_stdio(false);
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@ -24,6 +24,7 @@ int main(){
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while(d[i]){
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if(dq.front().second > d[i]){
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ans+=(dq.front().first+i*m)*d[i];
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dq.front().second-=d[i];
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d[i]=0;
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}else if(dq.front().second == d[i]){
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ans+=(dq.front().first+i*m)*d[i];
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24
src/10/10/mn1009t2pai.cpp
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24
src/10/10/mn1009t2pai.cpp
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@ -0,0 +1,24 @@
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#include <chrono>
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#include <cstdint>
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#include <iostream>
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#include <istream>
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#include <random>
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using ll = int64_t;
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std::mt19937 mt (std::chrono::high_resolution_clock::now);
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std::uniform_int_distribution<ll> un(1,2e6);
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int main(){
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std::iostream::sync_with_stdio(false);
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std::cin.tie(nullptr);
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ll n = un(mt);
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std::cout<<n<<"\n";
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for(ll i=1;i<=n;i++){
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std::cout<<un(mt)<<" ";
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}
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std::cout<<"\n";
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for(ll i=1;i<=n;i++){
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std::cout<<un(mt)<<" ";
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}
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std::cout<<"\n";
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}
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54
src/10/10/mn1009t2t.cpp
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54
src/10/10/mn1009t2t.cpp
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@ -0,0 +1,54 @@
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#include<bits/stdc++.h>
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typedef long long LL;
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using namespace std;
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const int N=2e6+100;
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LL d[N],p[N],q[N],w[N];
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int main()
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{
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// freopen("ice.in","r",stdin);
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// freopen("ice.out","w",stdout);
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int n,m,v,i;
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cin>>n>>m>>v;
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LL ans=0,dt=0,s,dn=0;
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for (i=1;i<=n;i++) {
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cin>>d[i];
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}
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for (i=1;i<=n;i++) {
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cin>>p[i];
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}
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int l=1,r=0;
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for (i = 1; i <= n; i++) {
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// 1. 维护队列单调性:移除价格更高的元素
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while (l <= r && p[i] - dt <= p[q[r]]) r--;
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s = d[i]; // 当前需求量
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// 2. 使用队列中更便宜的冰棍
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while (l <= r)
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if (s < w[q[l]] - dn) {
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// 当前需求小于队首能提供的数量
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ans += (p[q[l]] + dt) * s; // 使用s支
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dn += s; // 累计使用量增加
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s = 0;
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break;
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} else {
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// 当前需求大于等于队首能提供的数量
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ans += (p[q[l]] + dt) * (w[q[l]] - dn);
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s -= w[q[l]] - dn;
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dn = w[q[l++]]; // 队首元素完全使用,出队
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}
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// 3. 剩余需求用当前天的价格满足
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ans += 1LL * s * p[i];
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// 4. 将当前天加入队列
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q[++r] = i;
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w[i] = v + dn; // 当前天最多能提供v支(考虑容量)
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p[i] -= dt; // 调整价格(减去时间偏移)
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dt += m; // 时间偏移增加(存储成本)
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}
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printf("%lld\n",ans);
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return 0;
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}
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