https://vjudge.net/contest/285902#overview
A.Marjar Cola
#include <bits/stdc++.h>
using namespace std;
int T;
int main() {
scanf("%d", &T);
while(T --) {
int x, y, a, b;
int ans = 0;
scanf("%d%d%d%d", &x, &y, &a, &b);
if(x == 1 || y == 1 || (x == 2 && y == 2 && a == 2) ||(x == 2 && y == 2 && b == 2)) {
printf("INF\n");
continue;
}
while(1) {
if(a < x && b < y) break;
int num1 = a / x;
int num2 = b / y;
ans += (num1 + num2);
a = a - num1 * x + num1 + num2;
b = b - num2 * y + num1 + num2;
}
printf("%d\n", ans);
}
return 0;
}
C.How many Nines
#include <bits/stdc++.h>
using namespace std;
int dp[10005][13][33];
int date[13]={0,31,0,31,30,31,30,31,31,30,31,30,31};
int cal(int x)
{
if(x%400==0||(x%4==0&&x%100!=0))
return 29;
else return 28;
}
int check(int x,int y,int z)
{
int ans=0;
while(x)
{
if(x%10==9) ans++;
x/=10;
}
while(y)
{
if(y%10==9) ans++;
y/=10;
}
while(z)
{
if(z%10==9) ans++;
z/=10;
}
return ans;
}
int find_last(int x,int y,int z)
{
if(z!=1) return dp[x][y][z-1];
int day=date[y-1];
if(y==3) day=cal(x);
if(y!=1) return dp[x][y-1][day];
return dp[x-1][12][31];
}
int main()
{
for(int i=2000;i<=9999;i++)
{
int last_day;
for(int j=1;j<=12;j++)
{
int day=date[j];
if(j==2) day=cal(i);
for(int k=1;k<=day;k++)
{
dp[i][j][k]=check(i,j,k);
if(k!=1) dp[i][j][k]+=dp[i][j][k-1];
else if(j!=1) dp[i][j][k]+=dp[i][j-1][last_day];
else dp[i][j][k]+=dp[i-1][12][31];
}
last_day=day;
}
}
int T;scanf("%d",&T);
while(T--)
{
int x1,y1,z1,x2,y2,z2;
scanf("%d%d%d%d%d%d",&x1,&y1,&z1,&x2,&y2,&z2);
printf("%d\n",dp[x2][y2][z2]-find_last(x1,y1,z1));
}
}
F.Intervals
#include <bits/stdc++.h>
using namespace std;
const int maxn = 1e5 + 10;
int T;
struct Node{
int l;
int r;
int num;
}node[maxn], n[maxn];
bool cmp(const Node &a, const Node &b) {
if(a.l != b.l) return a.l < b.l;
else return a.r < b.r;
}
bool cmpp(const Node &a, const Node &b) {
return a.r > b.r;
}
bool isin(const Node &a, const Node &b, const Node &c) {
if(a.r >= b.l && b.r >= c.l && a.r >= c.l) return true;
return false;
}
int main() {
scanf("%d", &T);
while(T --) {
int N;
scanf("%d", &N);
for(int i = 1; i <= N; i ++) {
scanf("%d%d", &node[i].l, &node[i].r);
node[i].num = i;
}
vector<int> ans;
sort(node + 1, node + 1 + N, cmp);
n[1] = node[1], n[2] = node[2];
for(int i = 3; i <= N; i ++) {
n[3] = node[i];
sort(n + 1, n + 1 + 3, cmp);
if(isin(n[1], n[2], n[3])) {
sort(n + 1, n + 1 + 3, cmpp);
ans.push_back(n[1].num);
swap(n[1], n[3]);
}
else sort(n + 1, n + 3 + 1, cmpp);
}
sort(ans.begin(), ans.end());
printf("%d\n", ans.size());
for(int i = 0; i < ans.size(); i ++)
printf("%d%s", ans[i], i != ans.size() - 1 ? " " : "\n");
}
return 0;
}
G.Seven-Segment Display
#include<bits/stdc++.h>
using namespace std;
const int maxn=5500;
bitset<maxn>G[130][10],ans;
int t[9];
bool vis[9];
void work(int P)
{
for(int i=0;i<(1<<7);i++)
{
memset(vis,0,sizeof(vis));
for(int k=0;k<7;k++)
if(!(i>>k&1)) vis[t[k]]=1;
if(vis[1]&&vis[2]) G[i][1][P]=1;
if(vis[0]&&vis[1]&&vis[6]&&vis[4]&&vis[3]) G[i][2][P]=1;
if(vis[0]&&vis[1]&&vis[6]&&vis[2]&&vis[3]) G[i][3][P]=1;
if(vis[1]&&vis[5]&&vis[6]&&vis[2]) G[i][4][P]=1;
if(vis[0]&&vis[5]&&vis[6]&&vis[2]&&vis[3]) G[i][5][P]=1;
if(vis[0]&&vis[5]&&vis[6]&&vis[4]&&vis[2]&&vis[3]) G[i][6][P]=1;
if(vis[0]&&vis[1]&&vis[2]) G[i][7][P]=1;
if(vis[0]&&vis[1]&&vis[2]&&vis[3]&&vis[4]&&vis[5]&&vis[6]) G[i][8][P]=1;
if(vis[0]&&vis[1]&&vis[2]&&vis[3]&&vis[5]&&vis[6]) G[i][9][P]=1;
}
}
int main()
{
for(int i=0;i<7;i++)
t[i]=i;
int k=0;
do
{
work(k);
k++;
}while(next_permutation(t,t+7));
int T;scanf("%d",&T);
while(T--)
{
ans.set();
int n;scanf("%d",&n);
for(int i=1;i<=n;i++)
{
scanf("%d",&k);
int x=0;char str[9];scanf("%s",&str);
for(int j=0;j<7;j++)
x=x*2+str[j]-‘0‘;
ans&=G[x][k];
}
if(ans.any()) printf("YES\n");
else printf("NO\n");
}
}
H.Saddle Points
#include<bits/stdc++.h>
using namespace std;
const int mod=1e9+7;
int t[1005][1005],p[1005][1005],tmp[1005],kp[2005];
struct node
{
int id,val;
}b[1005];
bool cmp1(const node &A,const node &B)
{
return A.val>B.val;
}
bool cmp2(const node &A,const node &B)
{
return A.val<B.val;
}
int main()
{
kp[0]=1;
for(int i=1;i<2005;i++)
kp[i]=kp[i-1]*2%mod;
int T;scanf("%d",&T);
while(T--)
{
int n,m;scanf("%d%d",&n,&m);
for(int i=1;i<=n;i++)
for(int j=1;j<=m;j++)
scanf("%d",&t[i][j]),p[i][j]=0;
for(int i=1;i<=n;i++)
{
for(int j=1;j<=m;j++)
b[j].id=j,b[j].val=t[i][j],tmp[j]=0;
sort(b+1,b+m+1,cmp1);
for(int j=2;j<=m;j++)
{
if(b[j].val==b[j-1].val)
tmp[b[j].id]=tmp[b[j-1].id];
else tmp[b[j].id]=j-1;
}
for(int j=1;j<=m;j++)
p[i][j]+=tmp[j];
}
for(int j=1;j<=m;j++)
{
for(int i=1;i<=n;i++)
b[i].id=i,b[i].val=t[i][j],tmp[i]=0;
sort(b+1,b+n+1,cmp2);
for(int i=2;i<=n;i++)
{
if(b[i].val==b[i-1].val)
tmp[b[i].id]=tmp[b[i-1].id];
else
tmp[b[i].id]=i-1;
}
for(int i=1;i<=n;i++)
p[i][j]+=tmp[i];
}
int ans=0;
for(int i=1;i<=n;i++)
for(int j=1;j<=m;j++)
ans=(ans+kp[p[i][j]])%mod;
printf("%d\n",ans);
}
}
I.Course Selection System
#include <bits/stdc++.h>
using namespace std;
const int maxn = 1e5 + 10;
int T;
int h[maxn], c[maxn];
int dp[maxn];
int main() {
scanf("%d", &T);
while(T --) {
int N;
long long ans = 0;
scanf("%d", &N);
long long sum1 = 0;
for(int i = 0; i < N; i ++) {
scanf("%d%d", &h[i], &c[i]);
sum1 += c[i];
}
for(int i=0;i<=sum1;i++)
{
dp[i]=0;
}
for(int i = 0; i < N; i ++) {
for(int j = sum1; j >= c[i]; j --) {
if(dp[j] < dp[j - c[i]] + h[i]) {
dp[j] = dp[j - c[i]] + h[i];
long long cnt = 1LL*dp[j] * dp[j] - 1LL * dp[j] * j - 1LL * j * j;
if(cnt > ans) ans = cnt;
}
}
}
printf("%lld\n", ans);
}
return 0;
}
J.Knuth-Morris-Pratt Algorithm
#include <bits/stdc++.h>
using namespace std;
char t[1004];
int main()
{
int T;scanf("%d",&T);
while(T--)
{
scanf("%s",t+1);
int ans=0,len=strlen(t+1);
for(int i=1;i<=len;i++)
{
if(t[i]==‘c‘&&i<=len-2&&t[i+1]==‘a‘&&t[i+2]==‘t‘)
ans++;
if(t[i]==‘d‘&&i<=len-2&&t[i+1]==‘o‘&&t[i+2]==‘g‘)
ans++;
}
printf("%d\n",ans);
}
}
有队友的快落
FH
原文地址：https://www.cnblogs.com/zlrrrr/p/10467266.html
时间： 2024-08-26 22:02:38