Task: Snake and ladder
C++: #include <iostream>
#include <map>
#include <random>

std::default_random_engine generator;
std::uniform_int_distribution<int> dice(1, 6);
int rollDice() {
    return dice(generator);
}

const bool sixesThrowAgain = true;
const std::map<int, int> snl{
    {4, 14},
    {9, 31},
    {17, 7},
    {20, 38},
    {28, 84},
    {40, 59},
    {51, 67},
    {54, 34},
    {62, 19},
    {63, 81},
    {64, 60},
    {71, 91},
    {87, 24},
    {93, 73},
    {95, 75},
    {99, 78},
};


template <template<class, class, class...> class C, typename K, typename V, typename... Args>
V GetWithDef(const C<K, V, Args...>& m, K const& key, const V & defval) {
    typename C<K, V, Args...>::const_iterator it = m.find(key);
    if (it == m.end())
        return defval;
    return it->second;
}

int turn(int player, int square) {
    while (true) {
        int roll = rollDice();
        printf("Player %d, on square %d, rolls a %d", player, square, roll);
        if (square + roll > 100) {
            printf(" but cannot move.\n");
        } else {
            square += roll;
            printf(" and moves to square %d\n", square);
            if (square == 100) return 100;
            int next = GetWithDef(snl, square, square);
            if (square < next) {
                printf("Yay! Landed on a ladder. Climb up to %d.\n", next);
                square = next;
            } else if (next < square) {
                printf("Oops! landed on a snake. Slither down to %d.\n", next);
                square = next;
            }
        }
        if (roll < 6 || !sixesThrowAgain)return square;
        printf("Rolled a 6 so roll again.\n");
    }
}

int main() {
    
    int players[] = { 1, 1, 1 };

    while (true) {
        for (int i = 0; i < sizeof(players) / sizeof(int); ++i) {
            int ns = turn(i + 1, players[i]);
            if (ns == 100) {
                printf("Player %d wins!\n", i + 1);
                goto out;
            }
            players[i] = ns;
            printf("\n");
        }
    }

out:
    return 0;
}

Python: import random
import sys

snl = {
    4: 14,
    9: 31,
    17: 7,
    20: 38,
    28: 84,
    40: 59,
    51: 67,
    54: 34,
    62: 19,
    63: 81,
    64: 60,
    71: 91,
    87: 24,
    93: 73,
    95: 75,
    99: 78
}
sixesRollAgain = True

def turn(player, square):
    while True:
        roll = random.randint(1,6)
        sys.stdout.write("Player {0} on square {1}, rolls a {2}".format(player, square, roll))
        if square + roll > 100:
            print " but cannot move."
        else:
            square += roll
            print " and moves to square {0}".format(square)
            if square == 100:
                return 100
            next = snl.get(square, square)
            if square < next:
                print "Yay! landed on a ladder. Climb up to {0}.".format(next)
                if square == 100:
                    return 100
                square = next
            elif square > next:
                print "Oops! Landed on a snake. Slither down to {0}.".format(next)
                square = next
        if roll < 6 or not sixesRollAgain:
            return square
        print "Rolled a 6 so roll again."

def main():
    players = [1, 1, 1]
    while True:
        for i in range(0, 3):
            ns = turn(i+1, players[i])
            if ns == 100:
                print "Player {0} wins!".format(i+1)
                return
            players[i] = ns;
            print

main()