Economics Class

Alice has recently learned in her economics class that the market is said to be in equilibrium when the supply is equal to the demand. Alice has market data for $N$ time points in the form of two integer arrays $S$ and $D$. Here, $S_i$ denotes the supply at the $i^{th}$ point of time and $D_i$ denotes the demand at the $i^{th}$ point of time, for each $1 \leq i \leq N$. Help Alice in finding out