codeforces 339A.Helpful Maths B.Xenia and Ringroad 两水题

#include <string.h>
#include <stdio.h>
#include <algorithm>

using namespace std;

int main()
{
    char s[1005];
    int num[105];
    while (scanf("%s" , s) != EOF)
    {
        int l = strlen(s);
        int t = 0;
        int cnt = 0;
        for (int i = 0; i <= l; i++)
        {
            if (s[i] == '+' || !s[i])
            {
                num[++cnt] = t;
                t = 0;
                continue;
            }
            t = t*10 + s[i]-'0';
        }
        sort(num+1, num+cnt+1);
        for (int i = 1; i < cnt; i++)
            printf("%d+", num[i]);
        printf("%d\n", num[cnt]);
    }
    return 0;
}

#include <iostream>
#include <stdio.h>
#include <string.h>
#include <algorithm>
#include <math.h>
#include <stdlib.h>

using namespace std;

int a[100005];

int main()
{
    int n, m;
    __int64 ans;
    a[0] = 1;
    while (scanf("%d %d", &n, &m) != EOF)
    {
        ans = 0;
        for (int i = 1; i <= m; i++)
        {
            scanf("%d", &a[i]);
            if (a[i] >= a[i-1])
                ans += (__int64)(a[i] - a[i-1]);
            else
                ans += (n-a[i-1]+a[i]);
        }
        printf("%I64d\n", ans);
    }
    return 0;
}