Comet OJ

A题 骚动时节的少女们

水题

AC代码：

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;

namespace io {
    const int SIZE = 1e7 + 10;
    char inbuff[SIZE];
    char *l, *r;
    inline void init() {
        l = inbuff;
        r = inbuff + fread(inbuff, 1, SIZE, stdin);
    }
    inline char gc() {
        if (l == r) init();
        return (l != r) ? *(l++) : EOF;
    }
    void read(int &x) {
        x = 0; char ch = gc();
        while(!isdigit(ch)) ch = gc();
        while(isdigit(ch)) x = x * 10 + ch - '0', ch = gc();
    }
} using io::read;

int main(){
    int t;
    cin>>t;
    int a[6];
    int tmp;
    while (t--){
        memset(a, 0, sizeof(a));
        for (int i = 0; i < 5; i++){
            cin>>tmp;
            a[tmp]++;
        }
        int max_a = a[1], flag = 1;
        for (int i = 2; i <= 5; i++){
            if (a[i] > max_a){
                max_a = a[i];
                flag = i;
            }
        }
        cout<<flag<<endl;
    }
    return 0;
}

B题 奇偶性

 

规律题（但我那天晚上把l写成了1改了一晚上都没改出来导致没有ac掉（太过于愚蠢了

AC代码：

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;

namespace io {
    const int SIZE = 1e7 + 10;
    char inbuff[SIZE];
    char *l, *r;
    inline void init() {
        l = inbuff;
        r = inbuff + fread(inbuff, 1, SIZE, stdin);
    }
    inline char gc() {
        if (l == r) init();
        return (l != r) ? *(l++) : EOF;
    }
    void read(int &x) {
        x = 0; char ch = gc();
        while(!isdigit(ch)) ch = gc();
        while(isdigit(ch)) x = x * 10 + ch - '0', ch = gc();
    }
} using io::read;

int main(){
    int t;
    cin>>t;
    ll l, r, k;
    while (t--){
        cin>>l>>r>>k;
        if (k & 1) cout<<r - l + 1<<endl;
        else cout<<r - l + 1 - (r + 1) / (k + 1) + (l + 1) / (k + 1)<<endl;
    }
    return 0;
}