2017Nowcoder Girl初赛重现赛

https://ac.nowcoder.com/acm/contest/315#question

 

A.平方数

代码:

#include <bits/stdc++.h>
using namespace std;

int n;
int ans = 0;

int main() {
    scanf("%d", &n);
    for(int i = n; i >= 1; i --) {
        if((int)sqrt(i) == sqrt(i)) {
            ans = i;
            break;
        }
    }
    printf("%d\n", ans);
    return 0;
}
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B.勇气获得机

代码:

#include <bits/stdc++.h>
using namespace std;

int n;
vector<char> ans;

int main() {
    scanf("%d", &n);
    while(n) {
        if(n % 2 == 0) {
            ans.push_back('G');
            n = (n - 2) / 2;
        } else {
            ans.push_back('N');
            n = (n - 1) / 2;
        }
    }
    for(int i = ans.size() - 1; i >= 0; i --)
        printf("%c", ans[i]);
    printf("\n");
    return 0;
}
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C.排列

代码:

#include <bits/stdc++.h>
using namespace std;

const int maxn = 1e5 + 10;
int n;
int a[maxn];

int main() {
    scanf("%d", &n);
    for(int i = 1; i <= n; i ++)
        scanf("%d", &a[i]);

    int cnt = 0;
    for(int i = 1; i < n; i ++)
        if(a[i] == i) {
            cnt ++;
            swap(a[i], a[i + 1]);
        }

    if(a[n] == n) {
        swap(a[n], a[n - 1]);
        cnt ++;
    }

    printf("%d\n", cnt);

    return 0;
}
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D.打车

代码:

#include <bits/stdc++.h>
using namespace std;
 
int n, s;
int a[15];
 
int main() {
    scanf("%d%d", &n, &s);
    for(int i = 1; i <= n; i ++)
        scanf("%d", &a[i]);
    sort(a + 1, a + 1 + n);
    int sum = 0, i = 0, ans = 0;;
    while(sum < s && i <= n) {
        i ++;
        sum += a[i];
    }
 
    //printf("%d\n", i);
    int cnt = 0;
    for(int j = i; j >= 1; j --) {
        if(sum - a[j] >= s) {
            cnt ++;
            sum -= a[j];
        }
        else continue;
    }
    //printf("%d\n", cnt);
    printf("%d\n", i - cnt);
    return 0;
}
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F.美丽的项链

代码:

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
int n, m;
ll dp[25][220];
ll l[22], r[22];

int main() {
    scanf("%d%d", &n, &m);
    memset(dp, 0, sizeof(dp));
    for(int i = 1; i <= n; i ++)
        scanf("%d%d", &l[i], &r[i]);

    dp[0][0] = 1;
    for(int i = 1; i <= n; i ++) {
        for(int j = 0; j <= m; j ++) {
            for(int k = l[i]; k <= r[i]; k ++)
                dp[i][j + k] += dp[i - 1][j];
        }
    }
    printf("%lld\n", dp[n][m]);
    return 0;
}
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posted @ 2018-12-06 23:45  丧心病狂工科女  阅读(383)  评论(0编辑  收藏  举报