P1147 连续自然数和

水题 直接暴力就可以了

AC代码：

#include<bits/stdc++.h>
#define pi acos(-1)
typedef long long ll;
typedef unsigned long long ull;
using namespace std;

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;

bool cmp(const int &a, const int &b){
    return a > b;
}

int main(){
    ios::sync_with_stdio(false);
    int n;
    cin>>n;
    int sum;
    for (int i = 1; i <= n / 2; i++){
        sum = i;
        for (int j = i + 1; j < n; j++){
            sum += j;
            if (sum == n){
                cout<<i<<' '<<j<<endl;
                break;
            }
            else if (sum > n) break;
        }
    }
    return 0;
}