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#include<bits/stdc++.h> using namespace std; int a[500001]; int main(){ int n; cin >> n; for(int i=1;i<=n;i++){ cin >> a[i]; } sort(a+1,a+1+n); int cnt=1; for(int i=1;i<=n;i++){ if(a[i]==a[i+1])cnt++; else{ cout << a[i] << " " << cnt << endl; cnt=1; } } return 0; }

 #include<bits/stdc++.h>
using namespace std;
const int N = 101;
string a[N];//名字
int b[N],c[N];//b期末成绩，c班级评议成绩
char d[N],e[N];// d是否为学生干部，e西部学生
int f[N],sum[N];//f论文数 
int main(){
	int n,maxs = 0,cnt=0;
	string maxname = "";
	cin >> n;
	for(int i = 1;i<=n;i++){
		cin >> a[i] >> b[i] >> c[i] >> d[i] >> e[i] >> f[i];
		if(b[i]>80 && f[i]>=1) sum[i]+=8000;//院士奖
		if(b[i]>85 && c[i]>80) sum[i]+=4000;//wusi奖
		if(b[i]>90) sum[i]+=2000;//chengji 奖
		if(b[i]>85 && e[i]=='Y') sum[i]+=1000;//西部奖
		if(c[i]>80 && d[i]=='Y') sum[i]+=850;//班干部奖
		if(sum[i]>maxs){
			maxs = sum[i];
			maxname = a[i];
		}
		cnt += sum[i];
	}
	cout << maxname << endl << maxs <<endl << cnt; 
    return 0;
}

#include<bits/stdc++.h>
using namespace std;
int a,b,cnt = 0;
int rn(int n){
	int num = 0,s = n;
	while(n){
		num = num * 10 + n%10;
		n/=10;
	}
	return num == s;
}
int main(){
	cin >> a >> b;
	for(int i = a;i<=b;i++){ //12345678
		int y = i/10000;
		int m = i%10000/100;
		int d = i%100;
		if(m==1 || m==3 || m==5||m==7||m==8||m==10||m==12){
			if(d>=1 && d <= 31){
				if(rn(i)) cnt++;
			}
		}else if(m==4||m==6||m==9||m==11){
			if(d>=1 && d<= 30){
				if(rn(i)) cnt++;
			}
		}else if(m==2){
			if(y%4==0 && y%100 != 0 || y%400==0){
				if(d>=1 && d <= 29){
					if(rn(i)) cnt++;
				}
			}else{
				if(d>=1 && d<= 28){
					if(rn(i)) cnt++;
				}
			}
		}
	}
	cout << cnt;
    return 0;
}

https://dazi.91xjr.com/?raceId=90250

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oi