目录
RC-u1 大家一起查作弊 分数 15
RC-u2 谁进线下了?II 分数 20
RC-u3 势均力敌 分数 25
RC-u4 City 不 City 分数 30
RC-u5 贪心消消乐 分数 30
RC-u1 大家一起查作弊 分数 15
简单模拟题,对于多行读入使用while(getline(cin,s))即可
// 数学公式要变形
// 莫急莫急先读题
#include <bits/stdc++.h>
using namespace std;
#define lowbit(x) (x&(-x))
#define endl "\n"
#define ios ios::sync_with_stdio(0); cin.tie(0),cout.tie(0);
#define LF(x) fixed<<setprecision(x)// c++ 保留小数
#define den(a) cout << #a << " = " << a << "\n";
#define deg(a) cout << #a << " = " << a << " ";
typedef long long LL;
typedef pair<int, int> PII;
const int N=1000010,M=1010,INF=0x3f3f3f3f,mod=1e9+7;
const double pai=acos(-1.0);// pai
map<int,int> mp;
int t,n,m;
//是不是关键字
bool check(char x){
if('A'<=x and x<='Z') return true;
if('a'<=x and x<='z') return true;
if(isdigit(x)) return true;
return false;
}
//可疑分数计算
int get(string s){
int big = 0, small = 0, sz = 0;
for(auto&x:s){
if('A'<=x and x<='Z') big = 1;
if('a'<=x and x<='z') small = 1;
if(isdigit(x)) sz = 1;
}
if(big and small and sz) return 5;
if(sz and (big or small)) return 3;
if(big and small) return 1;
return 0;
}
void solve(){
int sum = 0,len = 0, cnt = 0;
string s;
while(getline(cin,s)){
string now;
for(auto&v:s)
if(check(v)) now += v;
else{
if(!now.empty()){
sum += get(now);
len += now.size();
cnt++;
}
now.clear();
}
// 可能最后还有东西
if(!now.empty()){
sum += get(now);
len += now.size();
cnt++;
}
}
cout << sum << endl;
cout << len << ' ' << cnt << endl;
return ;
}
signed main ()
{
ios// 不能有printf puts scanf
int t=1;
while(t--){
solve();
}
}
RC-u2 谁进线下了?II 分数 20
简单模拟,按照题目意思模拟即可
// 数学公式要变形
// 莫急莫急先读题
#include <bits/stdc++.h>
using namespace std;
#define lowbit(x) (x&(-x))
#define endl "\n"
#define ios ios::sync_with_stdio(0); cin.tie(0),cout.tie(0);
#define LF(x) fixed<<setprecision(x)// c++ 保留小数
#define den(a) cout << #a << " = " << a << "\n";
#define deg(a) cout << #a << " = " << a << " ";
typedef long long LL;
typedef pair<int, int> PII;
const int N=1000010,M=1010,INF=0x3f3f3f3f,mod=1e9+7;
const double pai=acos(-1.0);// pai
map<int,int> mp;
int t,n,m;
int d[30] = {0,25,21,18,16};
bool st[N];
int w[N];
struct code{
int id,x;
bool operator<(const code&t)const{
if(x==t.x) return id<t.id;
return x>t.x;
}
}e[N];
void solve(){
for(int i=5;i<=20;i++) d[i] = 20 - i;
cin>>n;
while(n--){
m = 20;
while(m--){
int x,r; cin>>x>>r;
w[x] += d[r];
st[x] = true;
}
}
n = 30;
for(int i=1;i<=n;i++) e[i]={i,w[i]};
sort(e+1,e+1+n);
for(int i=1;i<=n;i++){
auto [id,x] = e[i];
if(!st[id]) continue;
cout << id << ' ' << x << endl;
}
cout << endl;
return ;
}
signed main ()
{
ios// 不能有printf puts scanf
int t=1;
while(t--){
solve();
}
}
RC-u3 势均力敌 分数 25
按照题目直接暴力枚举所有情况使用全排列 + 二进制枚举
时间复杂度大致如下 同时不会跑满所以可以通过
// 数学公式要变形
// 莫急莫急先读题
#include <bits/stdc++.h>
using namespace std;
#define lowbit(x) (x&(-x))
#define endl "\n"
#define ios ios::sync_with_stdio(0); cin.tie(0),cout.tie(0);
#define LF(x) fixed<<setprecision(x)// c++ 保留小数
#define den(a) cout << #a << " = " << a << "\n";
#define deg(a) cout << #a << " = " << a << " ";
typedef long long LL;
typedef pair<int, int> PII;
const int N=1000010,M=1010,INF=0x3f3f3f3f,mod=1e9+7;
const double pai=acos(-1.0);// pai
map<int,int> mp;
int t,n,m;
int a[N],p[N];
void solve(){
cin>>n;
for(int i=1;i<=n;i++){
cin>>a[i];
p[i] = i;
}
vector<int> v;
int sum = 0;
do{
int ans = 0;
for(int i=1;i<=n;i++) ans = ans * 10 + a[p[i]];
v.push_back(ans);
sum += ans;
}while(next_permutation(p+1,p+1+n));
m = v.size();
for(int i=0;i<(1<<m);i++){
if(__builtin_popcount(i)!=m/2) continue;
int now = 0;
vector<int> ans;
for(int j=0;j<m;j++){
if(i>>j&1){
ans.push_back(v[j]);
now += v[j];
}
}
if(now==sum/2){
for(auto&v:ans) cout << v << endl;
cout << endl;
return ;
}
}
return ;
}
signed main ()
{
ios// 不能有printf puts scanf
int t=1;
while(t--){
solve();
}
}
RC-u4 City 不 City 分数 30
典型的分层图,一个城市有多个状态,跑一遍djikstra即可,注意本题是计算途经城市的hot值,所以初始状态是 d[s][0] = 0,在可以抵达t的时候来判断即可
// 数学公式要变形
// 莫急莫急先读题
#include <bits/stdc++.h>
using namespace std;
#define lowbit(x) (x&(-x))
#define endl "\n"
#define ios ios::sync_with_stdio(0); cin.tie(0),cout.tie(0);
#define LF(x) fixed<<setprecision(x)// c++ 保留小数
#define den(a) cout << #a << " = " << a << "\n";
#define deg(a) cout << #a << " = " << a << " ";
typedef long long LL;
typedef pair<int, int> PII;
typedef array<int,3> ar3;
const int N=1000010,M=1010,INF=0x3f3f3f3f,mod=1e9+7;
const double pai=acos(-1.0);// pai
map<int,int> mp;
int n,m,s,t;
int h[M];
vector<PII> g[M];
int d[M][110];
void solve(){
cin>>n>>m>>s>>t;
for(int i=1;i<=n;i++) cin>>h[i];
while(m--){
int a,b,c; cin>>a>>b>>c;
g[a].push_back({b,c});
g[b].push_back({a,c});
}
int ans = 2e9,pos = -1;
auto dijkstra = [&](){
memset(d,0x3f,sizeof d);
priority_queue<ar3,vector<ar3>,greater<ar3>> q;
d[s][0] = 0, q.push({0,s,0});
while(!q.empty()){
auto [cost,u,hot] = q.top(); q.pop();
for(auto&[v,w]:g[u]){
int ne = max(hot,h[v]);
if(v==t){
if(cost+w<ans){
ans = cost + w;
pos = hot;
}
else if(cost+w==ans and hot<pos){
pos = hot;
}
}
if(d[v][ne]>cost+w){
d[v][ne] = cost + w;
q.push({cost+w,v,ne});
}
}
}
};
dijkstra();
if(pos==-1) cout << "Impossible" << endl;
else cout << ans << ' ' << pos << endl;
return ;
}
signed main ()
{
ios// 不能有printf puts scanf
int t=1;
while(t--){
solve();
}
}
RC-u5 贪心消消乐 分数 30
贪心模拟,每次都暴力的找到可以选取的最大矩阵即可,然后模拟下降,没有找到正解,这里贴一下别人的x*(n^4)比较暴力的做法,赛时通过了
#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
constexpr int inf = 5E6;
void solve() {
int n;
cin >> n;
vector<vector<int>> g(n, vector<int>(n, 0));
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
cin >> g[i][j];
if (g[i][j] == 0) {
g[i][j] = -inf;
}
}
}
vector<vector<i64>> sum(n + 1, vector<i64>(n + 1, 0));
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
sum[i + 1][j + 1] = sum[i + 1][j] + sum[i][j + 1] - sum[i][j] + g[i][j];
}
}
i64 tot = 0;
while (1) {
i64 hi = 0;
int a, b, c, d;
for (int x1 = 0; x1 < n; x1++) {
for (int y1 = 0; y1 < n; y1++) {
for (int x2 = x1; x2 < n; x2++) {
for (int y2 = y1; y2 < n; y2++) {
if (g[y2][x2] == -inf) {
break;
}
i64 cur = sum[y2 + 1][x2 + 1] - sum[y2 + 1][x1] - sum[y1][x2 + 1] + sum[y1][x1];
if (cur > hi) {
hi = cur;
a = x1;
b = y1;
c = x2;
d = y2;
}
if (cur < 0) {
break;
}
}
}
}
}
if (hi <= 0) {
break;
}
tot += hi;
cout << "(" << a + 1 << ", " << b + 1 << ") (" << c + 1 << ", " << d + 1 << ") " << hi << "\n";
int o = d - b + 1;
for (int x = a; x <= c; x++) {
for (int y = d; y >= 0; y--) {
if (y >= o) {
g[y][x] = g[y - o][x];
} else {
g[y][x] = -inf;
}
}
}
for (int i = 0; i <= n; i++) {
fill(sum[i].begin(), sum[i].end(), 0);
}
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
sum[i + 1][j + 1] = sum[i + 1][j] + sum[i][j + 1] - sum[i][j] + g[i][j];
}
}
}
cout << tot << "\n";
}
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int T = 1;
// cin >> T;
while (T--) {
solve();
}
return 0;
}