三、阅读程序

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#include <iostream>
#include <cstring>
using namespace std;
int main()
{
    int t[256];
    char s[10];
    int i;
    scanf("%s", s);
    for(i = 0; i < 256; i++) t[i] = 0;
    for(i = 0; i < strlen(s); i++) t[s[i]]++;
    for(i = 0; i < strlen(s); i++)
        if(t[s[i]] == 1) {
            cout << s[i] << endl;
            return 0;
        }
    cout << "no" << endl;
    return 0;
}

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#include <stdio.h>
int g(int m, int n, int x) {
    int ans=0;
    int i;
    if(n == 1)
        return 1;
    for(i = x; i <= m / n; i++)
        ans += g(m - i, n - 1, i);
    return ans;
}
int main()
{
    int t, m, n;
    scanf("%d%d", &m, &n);
    printf("%d
", g(m, n, 0));
    return  0;
}

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#include <iostream>
#include <string>
using namespace std;
int main()
{
    string ch;
    int a[200];
    int b[200];
    int n, i, t, res;
    cin >> ch;
    n = ch.length();
    for(i = 0; i < 200; i++) b[i] = 0;
    for(i = 1; i <= n ; i++) {
        a[i] = ch[i-1] - '0';
        b[i] = b[i-1] + a[i];
    }
    res = b[n];
    t = 0;
    for(i = n; i > 0; i--) {
        if(a[i] == 0) t++;
        if(b[i-1] + t < res) res = b[i-1] + t;
    }
    cout << res << endl;
    return 0;
}

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#include <iostream>
using namespace std;
int main()
{
    int n, m;
    cin >> n >> m;
    int x = 1;
    int y = 1;
    int dx = 1;
    int dy = 1;
    int cnt = 0;
    while(cnt != 2) {
        cnt = 0;
        x = x + dx;
        y = y + dy;
        if(x == 1 || x == n) {
            ++cnt;
            dx = -dx;
        }
        if(y == 1 || y == m) {
            ++cnt;
            dy = -dy;
        }
    }
    cout << x << " " << y << endl;
    return  0 ;
}