Tournament (Editorial)

Let us declare two variables, $a$ and $b$, representing the number of games won by the first and second players, respectively. For each game, increase $a$ by one if the first player wins, and increase $b$ by one if the second player wins.

After all $n$ games are completed, compare the values of $a$ and $b$ and print the result.

Algorithm implementation

Read the number of games $n$. Initialize the variables $a$ and $b$ with zeros — they will store the number of wins for each player.

scanf("%d",&n);
a = b = 0;

Read the results of $n$ games and update the values of $a$ and $b$ according to the outcome of each game.

for(i = 0; i < n; i++)
{
  scanf("%d %d",&x,&y);
  if (x > y) a++;
  if (x < y) b++;
}

After processing all the games, compare the number of wins of the players and print the final result.

if (a > b) puts("1"); else
if (a < b) puts("2"); else
           puts("0");