int strToInt( string str ){ int i = 0, num = 0; bool isNeg = false; int len = str.Length(); if( str[0] == '-' ){ isNeg = true; i = 1; } while( i < len ){ num *= 10; num += ( str[i++] - '0' ); } if( isNeg ) num *= -1; return num; }
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