misha_shik2

#include <iostream>
#include <list>
#include <time.h>
#include <map>
#include <utility>
#include <string>

using namespace std;

void print(string s, multimap<int, float> mp) {
    cout << s;
    for (auto it = mp.begin(); it != mp.end(); ++ it)
        cout << it->first << ":" << it->second << "\n";
}

int main(void) {
    time_t t = time(NULL);
    srand(t);
    cout << "t = " << t << endl;

    int n;
    cout << "Input length> ";
    cin >> n;
    multimap<int, float> mp;
    cout << "\nMap:\n";
    for (int i = 0; i < n; ++ i) {
        int x = rand() % 100;
        mp.insert(pair<int, float>(i, x));
        cout << i << ":" << x << endl;
    }

//1
    multimap<int, float>::iterator iter = mp.begin();
    for (auto it = mp.begin(); it != mp.end(); ++ it) {
        if (it->second < iter->second)
            iter = it;
    }
    mp.erase(iter);
    print("\n(1)Map:\n", mp);

//2
    int key;
    cout << "Input key> ";
    cin >> key;
    iter = mp.find(key);
    if (iter != mp.end())
        mp.erase(iter);
    print("\n(2)Map:\n", mp);

//3
    iter = mp.begin();
    for (auto it = mp.begin(); it != mp.end(); ++ it) {
        if (it->second > iter->second)
            iter = it;
    }
    for (auto it = mp.begin(); it != mp.end(); ++ it)
        it->second *= iter->second;
    print("\n(3)Map:\n", mp);
    return 0;
}